[meteorite-list] Interactive Map of Every Meteorite Impact
List, Every known earth impact of a meteorite in an interactive scalable map: http://osm2.cartodb.com/tables/meteoritessize/embed_map?title=truedescription=truesearch=trueshareable=truecartodb_logo=truesql=zoom=2center_lat=39.075375179558346center_lon=0 Fun to play with... More elaborate than the Gaurdian map posted on the List earlier, but inspired by it: http://www.wunderground.com/news/meteorite-map-every-strike-earth-history-20130226 Sterling K. Webb __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Garry and Steve, Most excellent posts and information; thank you. Further to my original question. Would/should we expect that there may be ground-to-air electro-stactic response (lightning) prior to the arrival of the physical body to physical contact with the earth; and has this been simulated or captured on video? Dirk Ross...Tokyo --- On Wed, 2/27/13, Garry Stewart xe...@yahoo.com wrote: From: Garry Stewart xe...@yahoo.com Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: drtanuki drtan...@yahoo.com Date: Wednesday, February 27, 2013, 4:33 PM Hi Dirk and List, This link http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.html explains the propagation of atomic shockwaves with interesting pictures of shockwave propagation. It can explain the effects on meteoric explosions at high altitude. Interesting read but very long article and detailed. - Original Message - From: drtanuki drtan...@yahoo.com To: meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 12:59 AM Subject: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY)
Hi Darryl: Yes, a little more information would be good. How much space (no pun) do you have (floor or table)? How interactive do you want it to be and how many people are there to support what you do? Some activities can be done without a person involved others need a real person to run it. Building (and commenting) on what Peter suggested with respect to activities we have done in large venues: Solar System scale model: takes some space and better if you use one that is not just stringing them out in a line. You can do size comparison separate from distance and there are ways to actually have them make the planet with clay, but this takes time. Comet making can be fun, but for a large venue, probably best to do as a demo. Takes supplies and can get messy. I just did a variation of our Earth/Moon size and distance where you have 50 balls of clay and put them into two piles (totaling 50) to represent the size of the Moon relative to the Earth (40 and 10, 35 and 15, etc.) and then do the relative distance. Works well with hundreds going by over time. What you can do depends on the venue and the age group and whether or not they just wander by or you have them in a group. I could continue this conversation off line, if you want. Larry Hi Darryl, Just a few quick thoughts: Scale model of the solar system Meteorite hunting in a salted strewn field with magnet canes digital polarizing microscope with a cool thin section spectroscope Mars rover race Make a comet telescope observing Many of these ideas may not work for you. Could you tell us more about the event? Thanks, Peter __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY)
I might be old fashioned but - my advice - Just put out some good meteorites with good lighting and let them have a good look at it! There's nothing worse than walking through a display/museum with a token of artifacts around in badly lit cases and just seeing the kids playing around with the wooden wheels and bashing the buttons, they will enjoy it sure, but they won't learn anything and its forgotten 10 minutes later. Whereas I will always remember the first time I saw a large slab of Iron with the classic Widmanstatten pattern! So many museums these days are basically turning into playgrounds for kids. Sure there's room for some fun exhibits but we shouldn't underestimate the power of just showing the raw truth (i.e not posters and PC screens) - nature is wonderful enough, it doesn't need a PC or laser lightshow to jazz it up. The which rocks are from space and why' type display always seem to go down well, kids will always love magnets.. Mark Hi Darryl, Just a few quick thoughts: Scale model of the solar system Meteorite hunting in a salted strewn field with magnet canes digital polarizing microscope with a cool thin section spectroscope Mars rover race Make a comet telescope observing Many of these ideas may not work for you. Could you tell us more about the event? Thanks, Peter __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] New measures to protect fossils
New measures to protect fossils By WANG QIAN, chinadaily, February 27, 2013 http://usa.chinadaily.com.cn/china/2013-02/27/content_16261862.htm The article does not say anything about meteorites. However, if they are rethinking rules about fossils, they might also be rethinking the rules about meteorites. A compilation of web pages about rock and fossil collecting for various states and countries is Fruitbat's Pdf Library - Fossil Collecting – Management, Laws And Regulations at http://www.thefossilforum.com/index.php/topic/18378-fruitbats-pdf-library-fossil-collecting-management-laws-and-regulations/ Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Possible that comet will hit mars next year!!!
Would that be cool or what Thanks for the post...perhaps could re-direct to the Moon by accident of error? A new lunarmeteorite would arrive faster than a Martian. Best Regards, Dirk Ross...Tokyo --- On Wed, 2/27/13, Graham Ensor graham.en...@gmail.com wrote: From: Graham Ensor graham.en...@gmail.com Subject: [meteorite-list] Possible that comet will hit mars next year!!! To: meteorite list meteorite-list@meteoritecentral.com Date: Wednesday, February 27, 2013, 9:38 PM Has anyone come across this yet...unlikelybut would be quite an event? Just got this message from my nephew at Oxford Uni... There is a (admittedly slight) chance that a recently discovered comet, C/2013 A1 (Siding Spring), might be on a collision course with Mars in October 2014. Latest observations certainly include an impact possibility within the range of error. If it hits, estimates suggest a 500km wide, 2km deep crater arising from a ~20 Petaton event. That's something like 4 million times the (estimated) explosive power of the current global nuclear arsenal. Would be interesting to watch and see if any of the rovers on the surface manage to survive such an impact (I would imagine only possibly Curiosity but keeping lines of communication open with it might prove difficult). Might make for (eventually, but not in our lifetimes) some interesting future Martian meteorites. http://www.universetoday.com/100298/is-a-comet-on-a-collision-course-with-mars/ Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Possible that comet will hit mars next year!!!
wow That could be something to watch! But Im affraid it could be end not only for Curiosity but also for mars exploration for dozens of years if not more. So I dont know if I like to see it or not :)) -[ MARCIN CIMALA ]-[ I.M.C.A.#3667 ]- http://www.Meteoryty.pl marcin(at)meteoryty.pl http://www.PolandMET.com marcin(at)polandmet.com http://www.Gao-Guenie.com GSM: +48 (793) 567667 [ Member of Polish Meteoritical Society ] - Original Message - From: Graham Ensor graham.en...@gmail.com To: meteorite list meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 1:38 PM Subject: [meteorite-list] Possible that comet will hit mars next year!!! Has anyone come across this yet...unlikelybut would be quite an event? Just got this message from my nephew at Oxford Uni... There is a (admittedly slight) chance that a recently discovered comet, C/2013 A1 (Siding Spring), might be on a collision course with Mars in October 2014. Latest observations certainly include an impact possibility within the range of error. If it hits, estimates suggest a 500km wide, 2km deep crater arising from a ~20 Petaton event. That's something like 4 million times the (estimated) explosive power of the current global nuclear arsenal. Would be interesting to watch and see if any of the rovers on the surface manage to survive such an impact (I would imagine only possibly Curiosity but keeping lines of communication open with it might prove difficult). Might make for (eventually, but not in our lifetimes) some interesting future Martian meteorites. http://www.universetoday.com/100298/is-a-comet-on-a-collision-course-with-mars/ Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY)
Hi I want to thank everyone for their input. For those taking their first peek, I would like to know the coolest things you've experienced at an exploratorium/museum that pertain to space and space travel—or any other ideas you have pertaining to the same. As it regards further details of the expo in which I'm involved There will be approximately 30,000 square feet devoted to this endeavor which will take place in the most modern exhibition venue in Tel Aviv. (There was a jazz festival which occurred in the same space last year and the production (sound lights, staging, rigging, set design) was among the best I've experienced). The exhibition will contain space memorabilia as well as detailed, full-size replicas of Mercury and Apollo capsules (the latter was used in the film Apolllo 13)—as well as the replica of the space shuttle cockpit used in all big budget films and advertisements. And there will be meteorites! (I mean, after they ramped me in, how could there not be ;-) as well as the Peekskill Meteorite Car. There is a lot of room for possibilities for both group as well as individual exploratorium experiences. It is estimated that over the course of the summer 225,000 visitors will spend on-average approximately 2 1/2 hours at the exhibit, so there is not much that can be done in terms of small group let's build this efforts. To use Larry's phraseology, most of this exhibit is geared to wandering by. Hoping this further clarifies the nature of this event. Keep those ideas rollingLarry, please send me your number, I can't seem to find it. All the best and thanks again / Darryl On Feb 27, 2013, at 5:37 AM, lebof...@lpl.arizona.edu wrote: Hi Darryl: Yes, a little more information would be good. How much space (no pun) do you have (floor or table)? How interactive do you want it to be and how many people are there to support what you do? Some activities can be done without a person involved others need a real person to run it. Building (and commenting) on what Peter suggested with respect to activities we have done in large venues: Solar System scale model: takes some space and better if you use one that is not just stringing them out in a line. You can do size comparison separate from distance and there are ways to actually have them make the planet with clay, but this takes time. Comet making can be fun, but for a large venue, probably best to do as a demo. Takes supplies and can get messy. I just did a variation of our Earth/Moon size and distance where you have 50 balls of clay and put them into two piles (totaling 50) to represent the size of the Moon relative to the Earth (40 and 10, 35 and 15, etc.) and then do the relative distance. Works well with hundreds going by over time. What you can do depends on the venue and the age group and whether or not they just wander by or you have them in a group. I could continue this conversation off line, if you want. Larry Hi Darryl, Just a few quick thoughts: Scale model of the solar system Meteorite hunting in a salted strewn field with magnet canes digital polarizing microscope with a cool thin section spectroscope Mars rover race Make a comet telescope observing Many of these ideas may not work for you. Could you tell us more about the event? Thanks, Peter __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteor fever
Meteor fever is hitting everywhere. My local paper sent a reporter and photographer out yesterday to do a story about me and meteors. If interested, here it is.. http://www.satwatch.org/mike%20meteor%20story%20pueblo%20paper%20for%20web.png Thanks... Mike C. METEORWATCH.NET SATWATCH.ORG __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Alleged Bosnian Meteorite Reported
After the Chelyabinsk Airburst, there has been a noticeable increase in people inquiring about odd rocks that they have found. It all has been interesting and a good thing as I have had a good time looking at rocks and teaching people geology. In addition, as a result of the Chelyabinsk Airburst, the below report appeared in the news: Bosnia 'meteor' intrigues new generation in wake of Russia strike (A mysterious rock at a quarry in central Bosnia has seen has a spike in visitors in the wake of the meteor explosion over Russia last week.) The Telegraph, February 24, 2103. http://www.telegraph.co.uk/news/newstopics/howaboutthat/9890814/Bosnia-meteor-intrigues-new-generation-in-wake-of-Russia-strike.html Is this Bosnia rock a meteorite? by idoubtit, Doubtful News, February 24, 2013 http://doubtfulnews.com/2013/02/is-this-bosnia-rock-a-meteor/ Meteorite Bosnia: scienziati e scolaresche in pellegrinaggio alla roccia caduta dal cielo by Davide Mazzocco, Feb. 25, 2013 http://www.ecoblog.it/post/53649/meteorite-bosnia-scienziati-e-scolaresche-in-pellegrinaggio-alla-roccia-caduta-dal-cielo Judging from the available images, this objects looks like an meter-scale concretion instead of a meteorite. In addition, the statement, “It was so hot that it was impossible to approach..,” is the standard folklore that is associated all too many meteorwrongs. This implausible claim raises a rather large red flag about the validity of other comments about this object. It still would fun and enlightening for someone in the neighborhood to take a firsthand look at this specimen. Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY)
Hi Daryl, Great ideas coming in so far...how about adding a looped slide-show from apod.nasa? Watching Michael's suggested viewing of rain on the sun http://apod.nasa.gov/apod/ap130226.html the other day once again emphasized relative size and our Earth's cyclical climate relativity. I think the kids need to know that we can't just send a big firetruck up there to put out Mr. Sun. I ended up forwarding the link to a few friends who still need a small lesson in self-importance. ;~)) Richard Montgomery - Original Message - From: Darryl Pitt dar...@dof3.com To: meteoritelist meteoritelist meteorite-list@meteoritecentral.com Sent: Tuesday, February 26, 2013 8:28 PM Subject: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY) Hi, I could really use some assistance, please. I am involved in a SPACE EXPO and we're in the process of determining what the most fun interactive exhibits might be for children who are 8-14. With the foregoing in mind, what are some of the best interactive exhibits you've seen that pertain to space or space travel? Any ideas or great experiences that you or your kids had would be much appreciated. Thanks so much! A couple of simple examples: —Child ascends a scale to see how much she weighs on Earth.she moves over to the next scale which is calibrated to reveal how much she would weigh on the Moonshe then moves over to the next scale to see how much she would weigh on Jupiter. —Child Walks on the Moon. [There is a lunar fragment encased in a Lucite brick that a child can walk on, and so they are in effect Walking on the Moon. Thanks again for sharing your faves—and if it's currently exhibited, I would appreciate your mentioning the name of the institution. Thanks! Best / Darryl __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] ODDS
I believe this info is relevant to the List considering all the recent events and pronouncements involving meteorites and firearms this past week.. Odds of Dying in the U.S. from Selected Causes Motor Vehicle Accident 1 in 90 Murder 1 in 300 Fire 1 in 800 Firearms Accident 1 in 2,500 Asteroid/Comet Impact (lower limit) 1 in 3,000 Drdowning 1 in 9,000 Airplane Crash 1 in 30,000 Flood 1 in 30,000 Tornado 1 in 60,000 Earthquake 1 in 130,000 Asteroid/Comet Impact (upper limit) 1 in 250,000 Food Poisoning by Botulism 1 in 3,000,000 Shark Attack 1 in 8,000.000 Odds of winning the PowerBall 1 in 195,249,054 So, the odds of a person dying from a gunshot wound are very close to the odds given to being taken out by a meteorite. Regard, Count Deiro IMCA 3536 and proud member of the NRA. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Hi Dirk and List, Somebody with three letters after their name caused this explanation: As a high velocity meteoroid encounters denser atmosphere, there exists an increasing pressure difference between its frontal and rearward areas. This plus the very high temperatures create the instabilities that ultimately cause the sudden destruction of the body. Chrondite meteoroids are more vulnerable to this type of destruction than iron/nickel bodies because of lesser strength. Now, I as a layman think that what causes a perceived explosion is as above, but more succintly, that the the compression wave created at the leading area of the mass collides with the stationary refractory wave that is almost instantaneously being generated at the rear of the mass. Sort of like clapping your hands together while moving your arms rapidly in one direction. Regards, Guido -Original Message- From: drtanuki drtan...@yahoo.com Sent: Feb 26, 2013 10:59 PM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Hi Dirk and List, This link http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.html explains the propagation of atomic shockwaves with interesting pictures of shockwave propagation. It can explain the effects on meteoric explosions at high altitude. Interesting read but very long article and detailed. - Original Message - From: drtanuki drtan...@yahoo.com To: meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 12:59 AM Subject: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Breaking News -LA TX MX Bolide 27FEB2013
List, Breaking News -LA TX MX Bolide 27FEB2013 http://lunarmeteoritehunters.blogspot.jp/2013/02/breaking-news-la-mx-tx-bolide-fireball.html Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
A body larger than about a centimeter transfers its kinetic energy to other forms primarily by compressing the air in front of it as it descends into the atmosphere. The pressure involved is typically very large- tens or hundreds of megapascals for meter-class bodies. Once this ram pressure exceeds the material strength of the body, it breaks apart (presumably along existing fault lines, so the material properties of the body are important- and generally unknown). Before the breakup, the heat created by compressing air is melting the surface of the meteoroid, resulting in ablation. This ablation is responsible for some of the light we see (along with atmospheric ionization from the same heat source), but is not particularly disruptive to the meteoroid. Only the outer surface is affected. Ablation is a very efficient way of removing energy (which is why spacecraft heat shields prior to the shuttles were ablative). When the meteoroid fragments at hypersonic speeds, however, additional surface area is instantly exposed, resulting in a rapid heating of the surrounding air (which is just a fancy way of saying explosion). If a body breaks into just a few pieces, as is common, we may see a central or terminal brightening. If it completely shatters into thousands of pieces (as seems likely with Chelyabinsk) the energy from the suddenly heated air is immense- an efficient conversion of kinetic energy to thermal energy. The expanding hot air can produce an impressive sonic wave, and probably further disrupts the meteoroid itself. I don't that there are any electrical forces of a significant size to affect the structure or motion of the meteoroid, although atmospheric electrical effects probably occur (e.g. electrophonics). Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/26/2013 11:59 PM, drtanuki wrote: Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Divers Find Russian Meteorite Craters in Chebarkul Lake
http://rt.com/news/russian-meteorite-lake-craters-537/ Divers find Russian meteorite craters in Chebarkul Lake rt.com February 27, 2013 Divers searching Chebarkul Lake in Russia's Urals region have found several craters that may be the impact zones of fragments of the now-famous meteorite that exploded over the area on February 15. The underwater hunt for the rare stones was hampered by cold weather and light-obstructing mud stirred up from the bottom. The divers used powerful lights and probes to uncover several potential sites where meteorite fragments may have landed. On Thursday, a team from Ekaterinburg will join in the search by conducting a magnetic survey of the prospect locations; the initial results could be ready as early as that evening. Some fragments of the meteorite were retrieved in the Chelyabinsk region, which endured the bulk of the spectacular cosmic event. The biggest meteorite chunk discovered was about 1 kilogram. It is hoped that the fragments inside the lake could be much bigger, weighing dozens of kilograms. Videos of the meteorite streaking across Russia's sky proved to be not only awe-inspiring for YouTube, but also served a scientific purpose: Two groups of researchers used the clips to calculate the meteorite's trajectory. Colombian astronomers from the University of Antioquia in Medellin are believed to be the first to report their preliminary results last week at the scientific publishing website arxiv.org. A similar work by researchers at the Astronomical Institute of Czech Academy of Sciences came days later on Monday. Both teams used the proven method of analyzing video footage of the meteorite's descent through a little bit of trigonometry. This time, however, the footage was taken by CCTV, car cameras and smartphones, rather than precisely calibrated observatory recorders. The Russian meteorite was determined to be an Apollo-class asteroid, one of an estimated 5,000 near-Earth bodies orbiting the Sun and occasionally crossing the Earth's orbit. Most of these objects are spread out between the orbits of Venus and Jupiter. Russian astronomers will report their findings later in March, but have already confirmed that the results published by the Columbian and Czech researchers correspond with their findings. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Hi Chris, Do you have any references you could point me to for how break-up scales with size-mass-physical properties etc. of meteoroids. I am interested in knowing the sweet-spot for yielding meteorites on the ground. In other words, when is a meteoroid too small or too big to produce significant large pieces of surviving material? It seems like Chelyabinsk is outside the sweet spot as it apparently produced mostly fragments even though it had large mass. On the other hand much bigger masses may also survive. Is it bimodal? Thanks, Carl Agee -- Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Feb 27, 2013 at 9:21 AM, Chris Peterson c...@alumni.caltech.edu wrote: A body larger than about a centimeter transfers its kinetic energy to other forms primarily by compressing the air in front of it as it descends into the atmosphere. The pressure involved is typically very large- tens or hundreds of megapascals for meter-class bodies. Once this ram pressure exceeds the material strength of the body, it breaks apart (presumably along existing fault lines, so the material properties of the body are important- and generally unknown). Before the breakup, the heat created by compressing air is melting the surface of the meteoroid, resulting in ablation. This ablation is responsible for some of the light we see (along with atmospheric ionization from the same heat source), but is not particularly disruptive to the meteoroid. Only the outer surface is affected. Ablation is a very efficient way of removing energy (which is why spacecraft heat shields prior to the shuttles were ablative). When the meteoroid fragments at hypersonic speeds, however, additional surface area is instantly exposed, resulting in a rapid heating of the surrounding air (which is just a fancy way of saying explosion). If a body breaks into just a few pieces, as is common, we may see a central or terminal brightening. If it completely shatters into thousands of pieces (as seems likely with Chelyabinsk) the energy from the suddenly heated air is immense- an efficient conversion of kinetic energy to thermal energy. The expanding hot air can produce an impressive sonic wave, and probably further disrupts the meteoroid itself. I don't that there are any electrical forces of a significant size to affect the structure or motion of the meteoroid, although atmospheric electrical effects probably occur (e.g. electrophonics). Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/26/2013 11:59 PM, drtanuki wrote: Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New measures to protect fossils
They should be working on a way to stop the flow of fake fossils out of China. Half of the fossils coming out of China now are bogus. I wouldn't touch a Chinese fossil with the proverbial ten-foot pole. Best regards, MikeG On 2/27/13, Paul H. inselb...@cox.net wrote: New measures to protect fossils By WANG QIAN, chinadaily, February 27, 2013 http://usa.chinadaily.com.cn/china/2013-02/27/content_16261862.htm The article does not say anything about meteorites. However, if they are rethinking rules about fossils, they might also be rethinking the rules about meteorites. A compilation of web pages about rock and fossil collecting for various states and countries is Fruitbat's Pdf Library - Fossil Collecting – Management, Laws And Regulations at http://www.thefossilforum.com/index.php/topic/18378-fruitbats-pdf-library-fossil-collecting-management-laws-and-regulations/ Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY)
Hi Darryl, It sounds as if this is a very exciting project. Since the exhibited is in Israel I think you should include a display about Israel's first astronaut, Ilan Ramon. He was killed in the Columbia crash. Portions of his diary survived the crash. If you could display a page of it I think it would be a highlight of the Expo. Even a replica of a page would be of great interest. I think you should strongly consider the scale Solar System. I would use a scale similar to the one that the Boston Science Museum used. http://www.everytrail.com/guide/community-solar-system-trail-boston-museum-o f-science The planets need not be in a line the planets could radiate out from the Sun at the Expo. I think that it is more important that they be in exciting places. They will serve as advertisements for the expo. I can imagine a social media aspect to the display where people post pictures of themselves and their friends at the planets. Thanks, Peter -Original Message- From: Darryl Pitt [mailto:dar...@dof3.com] Sent: Wednesday, February 27, 2013 9:55 AM To: lebof...@lpl.arizona.edu Cc: petersche...@rcn.com; meteoritelist meteoritelist Subject: Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY) Hi I want to thank everyone for their input. For those taking their first peek, I would like to know the coolest things you've experienced at an exploratorium/museum that pertain to space and space travel-or any other ideas you have pertaining to the same. As it regards further details of the expo in which I'm involved There will be approximately 30,000 square feet devoted to this endeavor which will take place in the most modern exhibition venue in Tel Aviv. (There was a jazz festival which occurred in the same space last year and the production (sound lights, staging, rigging, set design) was among the best I've experienced). The exhibition will contain space memorabilia as well as detailed, full-size replicas of Mercury and Apollo capsules (the latter was used in the film Apolllo 13)-as well as the replica of the space shuttle cockpit used in all big budget films and advertisements. And there will be meteorites! (I mean, after they ramped me in, how could there not be ;-) as well as the Peekskill Meteorite Car. There is a lot of room for possibilities for both group as well as individual exploratorium experiences. It is estimated that over the course of the summer 225,000 visitors will spend on-average approximately 2 1/2 hours at the exhibit, so there is not much that can be done in terms of small group let's build this efforts. To use Larry's phraseology, most of this exhibit is geared to wandering by. Hoping this further clarifies the nature of this event. Keep those ideas rollingLarry, please send me your number, I can't seem to find it. All the best and thanks again / Darryl On Feb 27, 2013, at 5:37 AM, lebof...@lpl.arizona.edu wrote: Hi Darryl: Yes, a little more information would be good. How much space (no pun) do you have (floor or table)? How interactive do you want it to be and how many people are there to support what you do? Some activities can be done without a person involved others need a real person to run it. Building (and commenting) on what Peter suggested with respect to activities we have done in large venues: Solar System scale model: takes some space and better if you use one that is not just stringing them out in a line. You can do size comparison separate from distance and there are ways to actually have them make the planet with clay, but this takes time. Comet making can be fun, but for a large venue, probably best to do as a demo. Takes supplies and can get messy. I just did a variation of our Earth/Moon size and distance where you have 50 balls of clay and put them into two piles (totaling 50) to represent the size of the Moon relative to the Earth (40 and 10, 35 and 15, etc.) and then do the relative distance. Works well with hundreds going by over time. What you can do depends on the venue and the age group and whether or not they just wander by or you have them in a group. I could continue this conversation off line, if you want. Larry Hi Darryl, Just a few quick thoughts: Scale model of the solar system Meteorite hunting in a salted strewn field with magnet canes digital polarizing microscope with a cool thin section spectroscope Mars rover race Make a comet telescope observing Many of these ideas may not work for you. Could you tell us more about the event? Thanks, Peter __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Chris and all, I will refine my questions a bit regarding the Russian asteroid (meteoroid) body: Could resonance (differential-harmonics) within the body cause disintegration? Can we expect to see an Earth-ground electrical discharge towards the meteoroid? Is it possible? And could differential electrical charges on the leading and trailing part of the body cause internal disruption leading to disintegration? Thank you. Forgive me if my questions are poorly based or asked. Dirk Ross...Tokyo --- On Thu, 2/28/13, Chris Peterson c...@alumni.caltech.edu wrote: From: Chris Peterson c...@alumni.caltech.edu Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: meteorite-list@meteoritecentral.com Date: Thursday, February 28, 2013, 1:21 AM A body larger than about a centimeter transfers its kinetic energy to other forms primarily by compressing the air in front of it as it descends into the atmosphere. The pressure involved is typically very large- tens or hundreds of megapascals for meter-class bodies. Once this ram pressure exceeds the material strength of the body, it breaks apart (presumably along existing fault lines, so the material properties of the body are important- and generally unknown). Before the breakup, the heat created by compressing air is melting the surface of the meteoroid, resulting in ablation. This ablation is responsible for some of the light we see (along with atmospheric ionization from the same heat source), but is not particularly disruptive to the meteoroid. Only the outer surface is affected. Ablation is a very efficient way of removing energy (which is why spacecraft heat shields prior to the shuttles were ablative). When the meteoroid fragments at hypersonic speeds, however, additional surface area is instantly exposed, resulting in a rapid heating of the surrounding air (which is just a fancy way of saying explosion). If a body breaks into just a few pieces, as is common, we may see a central or terminal brightening. If it completely shatters into thousands of pieces (as seems likely with Chelyabinsk) the energy from the suddenly heated air is immense- an efficient conversion of kinetic energy to thermal energy. The expanding hot air can produce an impressive sonic wave, and probably further disrupts the meteoroid itself. I don't that there are any electrical forces of a significant size to affect the structure or motion of the meteoroid, although atmospheric electrical effects probably occur (e.g. electrophonics). Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/26/2013 11:59 PM, drtanuki wrote: Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY)
Thanks Peter! The Ramon Foundation is indeed involved and Ilan's contributions will be celebrated. (It was as a result of the Foundation, in part, that I was provided access to where so much space program stuff is kept that's not on museum display. Warehouse Row on Redstone Arsenal was mindblowing—and I'm only referring to the few to which I had access...gosh knows what's in some of the others. I completely agree as it regards a scaled solar system. Thank you, again, Peter. On Feb 27, 2013, at 1:24 PM, Peter Scherff wrote: Hi Darryl, It sounds as if this is a very exciting project. Since the exhibited is in Israel I think you should include a display about Israel's first astronaut, Ilan Ramon. He was killed in the Columbia crash. Portions of his diary survived the crash. If you could display a page of it I think it would be a highlight of the Expo. Even a replica of a page would be of great interest. I think you should strongly consider the scale Solar System. I would use a scale similar to the one that the Boston Science Museum used. http://www.everytrail.com/guide/community-solar-system-trail-boston-museum-o f-science The planets need not be in a line the planets could radiate out from the Sun at the Expo. I think that it is more important that they be in exciting places. They will serve as advertisements for the expo. I can imagine a social media aspect to the display where people post pictures of themselves and their friends at the planets. Thanks, Peter -Original Message- From: Darryl Pitt [mailto:dar...@dof3.com] Sent: Wednesday, February 27, 2013 9:55 AM To: lebof...@lpl.arizona.edu Cc: petersche...@rcn.com; meteoritelist meteoritelist Subject: Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY) Hi I want to thank everyone for their input. For those taking their first peek, I would like to know the coolest things you've experienced at an exploratorium/museum that pertain to space and space travel-or any other ideas you have pertaining to the same. As it regards further details of the expo in which I'm involved There will be approximately 30,000 square feet devoted to this endeavor which will take place in the most modern exhibition venue in Tel Aviv. (There was a jazz festival which occurred in the same space last year and the production (sound lights, staging, rigging, set design) was among the best I've experienced). The exhibition will contain space memorabilia as well as detailed, full-size replicas of Mercury and Apollo capsules (the latter was used in the film Apolllo 13)-as well as the replica of the space shuttle cockpit used in all big budget films and advertisements. And there will be meteorites! (I mean, after they ramped me in, how could there not be ;-) as well as the Peekskill Meteorite Car. There is a lot of room for possibilities for both group as well as individual exploratorium experiences. It is estimated that over the course of the summer 225,000 visitors will spend on-average approximately 2 1/2 hours at the exhibit, so there is not much that can be done in terms of small group let's build this efforts. To use Larry's phraseology, most of this exhibit is geared to wandering by. Hoping this further clarifies the nature of this event. Keep those ideas rollingLarry, please send me your number, I can't seem to find it. All the best and thanks again / Darryl On Feb 27, 2013, at 5:37 AM, lebof...@lpl.arizona.edu wrote: Hi Darryl: Yes, a little more information would be good. How much space (no pun) do you have (floor or table)? How interactive do you want it to be and how many people are there to support what you do? Some activities can be done without a person involved others need a real person to run it. Building (and commenting) on what Peter suggested with respect to activities we have done in large venues: Solar System scale model: takes some space and better if you use one that is not just stringing them out in a line. You can do size comparison separate from distance and there are ways to actually have them make the planet with clay, but this takes time. Comet making can be fun, but for a large venue, probably best to do as a demo. Takes supplies and can get messy. I just did a variation of our Earth/Moon size and distance where you have 50 balls of clay and put them into two piles (totaling 50) to represent the size of the Moon relative to the Earth (40 and 10, 35 and 15, etc.) and then do the relative distance. Works well with hundreds going by over time. What you can do depends on the venue and the age group and whether or not they just wander by or you have them in a group. I could continue this conversation off line, if you want. Larry Hi Darryl, Just a few quick thoughts: Scale model of the solar system Meteorite hunting in a salted
Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY)
I agree totally with you Mark. Museums are turning into amusement parks for kids and they forget the adults. I much prefer the Vienna Museum style to all those toys. Anne M. Black www.IMPACTIKA.com impact...@aol.com -Original Message- From: Mark Ford mark.f...@southernscientific.co.uk To: Meteorite-list Meteorite-list@meteoritecentral.com Sent: Wed, Feb 27, 2013 4:15 am Subject: Re: [meteorite-list] SPACE EXPO - OFF TOPIC (TANGENTIALLY) I might be old fashioned but - my advice - Just put out some good meteorites with good lighting and let them have a good look at it! There's nothing worse than walking through a display/museum with a token of artifacts around in badly lit cases and just seeing the kids playing around with the wooden wheels and bashing the buttons, they will enjoy it sure, but they won't learn anything and its forgotten 10 minutes later. Whereas I will always remember the first time I saw a large slab of Iron with the classic Widmanstatten pattern! So many museums these days are basically turning into playgrounds for kids. Sure there's room for some fun exhibits but we shouldn't underestimate the power of just showing the raw truth (i.e not posters and PC screens) - nature is wonderful enough, it doesn't need a PC or laser lightshow to jazz it up. The which rocks are from space and why' type display always seem to go down well, kids will always love magnets.. Mark Hi Darryl, Just a few quick thoughts: Scale model of the solar system Meteorite hunting in a salted strewn field with magnet canes digital polarizing microscope with a cool thin section spectroscope Mars rover race Make a comet telescope observing Many of these ideas may not work for you. Could you tell us more about the event? Thanks, Peter __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Chris, Working on oil and gas wells it is routine to test the fracture point of the rock at the bottom of the well after having run and cemented a casing string (leak off test). You do this by shutting in the well at surface and pumping incremental volumes of mud into the hole and noting the rise in surface pressure with each injection. When the rock is behaving elastically the rise in pressure is linear with volume, but you can see when the rock has reached its elastic limit when the pressure increase with volume becomes less. This occurs at the onset of fracture generation, and continued pumping typically results in extensive fracture propagation and an actual lowering of surface pressure as it is dissipated by mud flowing into the fractures. Same principal is employed with hydraulic fracturing to increase production surface from low permeability lithologies (shale etc). Empirically testing the fracture point of the rock gives you a handle on the maximum mud density the well can sustain when drilling the next hole section, and the maximum pressure one could hold at surface with the BOP in the event of encountering formation pressure in excess of the mud hydrostatic. If you exceed the fracture pressure by increasing the mud 'weight' (density) to control formation pressure, the danger is you induce fractures, lose height in your your mud column as it drains into the wellbore thereby reducing hydrostatic pressure at the bottom of the well and thereby risking falling below the formation pressure inducing the well to flow (kick) or blowout in the worst case. Shutting a flowing well in with the BOP when the formation pressure is higher than the mud hydrostatic (I.e. Flowing) you ideally do not want the surface pressure plus the mud hydrostatic to exceed the 'leak off' as then you run the risk of an underground blowout where the high formation pressure flowing zone breaks down a weaker zone (generally higher up) and flows formation fluid (oil/water/gas) into it displacing the mud present between the two zones. I apologise for the off topic background above but I am wondering if the disintegration mechanism is analogous for a meteor. The pressures you quote at the leading surface of the meteor are in the typical range I would expect from the well experience. Presumably the pressure at the rear is relatively low, and the pressure cannot dissipate around the object due to the speed of entry exceeding the speed of flow of compressed air around it. So if this pressure differential is applied to the front of the object there must come a point where the elastic limit is breached, fractures are induced, and then rapidly propagate. Once there are multiple paths of pressure communication through the former solid object rather than around it, there is presumably a rapid lowering of differential pressure from front to rear occurring as air rushes through the gaps between the fractured pieces and expands as the pressure lowers towards the rear of the disintegrating meteor pushing everything apart (I.e. Exploding). As Chris says this also vastly increases the surface area for incandescence and the the luminosity might be expected to greatly increase. I am wondering if this is at all a realistic description of what might be going on? I am unsure of the temperatures involved at the leading edge and in any case I can't find phase properties for water at those extremes, but also wonder if water exists as a liquid or gaseous phase at the leading edge or is it entirely plasma?. I'm sure the pressure would take it past the dewpoint but is the elevated temperature sufficient to prevent condensation at some point so that a liquid 'injection' phase forms at some point during disintegration and collapse of the initial pressure differential? Condensed water seems evident in the trail judging by white colour evident in some 'smoke trails'. Are there any published properties for typical chondrites/irons/mesosiderites available (e.g. Porosity, permeability, Poisson's ratio etc), and have any destructive pressure experiments been conducted to determine failure mechanisms for these materials? I presume the ductility inherent in irons versus the brittle nature of chondrites results in disintegration along far fewer planes of fracture, generally resulting in larger pieces after failure. Regards, John On 27/02/2013 09:21, Chris Peterson c...@alumni.caltech.edu wrote: A body larger than about a centimeter transfers its kinetic energy to other forms primarily by compressing the air in front of it as it descends into the atmosphere. The pressure involved is typically very large- tens or hundreds of megapascals for meter-class bodies. Once this ram pressure exceeds the material strength of the body, it breaks apart (presumably along existing fault lines, so the material properties of the body are important- and generally unknown). Before the breakup, the heat created by compressing air is melting the surface of the meteoroid, resulting
[meteorite-list] OT-sort of - Sci-fi Comet killer using Microwave Blast Weapon
List, Sorry for the sci-fi off-topic sort of question. Given IF we can get close enough to a comet body how effective would a microwave weapon be and is it possible to launch a large enough microwave weapon into space? Thank you. Dirk Ross...Tokyo Yes, we have 2 comets visible this year. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Possible that comet will hit mars next year!!!
If only we were a few decades ahead in our space tech, then we could make sure the comet hits mars at a low angle for high ablation and begin our terraforming efforts! The gases from a 50 km comet will be substantial! Not to mention the heat/energy from impact could help raise temperature, which would turn Mar's dry ice into even more atmosphere; a nice chain reaction. -Yinan On Wed, Feb 27, 2013 at 7:59 AM, Marcin Cimala mar...@meteoryt.net wrote: wow That could be something to watch! But Im affraid it could be end not only for Curiosity but also for mars exploration for dozens of years if not more. So I dont know if I like to see it or not :)) -[ MARCIN CIMALA ]-[ I.M.C.A.#3667 ]- http://www.Meteoryty.pl marcin(at)meteoryty.pl http://www.PolandMET.com marcin(at)polandmet.com http://www.Gao-Guenie.com GSM: +48 (793) 567667 [ Member of Polish Meteoritical Society ] - Original Message - From: Graham Ensor graham.en...@gmail.com To: meteorite list meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 1:38 PM Subject: [meteorite-list] Possible that comet will hit mars next year!!! Has anyone come across this yet...unlikelybut would be quite an event? Just got this message from my nephew at Oxford Uni... There is a (admittedly slight) chance that a recently discovered comet, C/2013 A1 (Siding Spring), might be on a collision course with Mars in October 2014. Latest observations certainly include an impact possibility within the range of error. If it hits, estimates suggest a 500km wide, 2km deep crater arising from a ~20 Petaton event. That's something like 4 million times the (estimated) explosive power of the current global nuclear arsenal. Would be interesting to watch and see if any of the rovers on the surface manage to survive such an impact (I would imagine only possibly Curiosity but keeping lines of communication open with it might prove difficult). Might make for (eventually, but not in our lifetimes) some interesting future Martian meteorites. http://www.universetoday.com/100298/is-a-comet-on-a-collision-course-with-mars/ Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Hi John- I don't doubt that there are analogs between the fracturing you describe at the bottom of a well and what happens with a meteor. However, there may be some fundamental material differences. The rock at the bottom of the well is typically very large compared with the area where pressure is applied, and is already under high pressure. A meteoroid may range from nearly monolithic (particularly in the case of an iron body) to something like a rubble pile. Obviously, the response to a non-isotropic force from ram pressure will be very different in those cases. I'm not sure what happens to water during meteoritic flight. Most meteor trails are largely composed of dust, but if water trails are observed, I suspect they are largely produced in the same way that many airplane contrails are- the condensation of existing atmospheric water vapor onto solid particles, particularly in response to aerodynamic effects such as vortex production. There is lots of published information on the material properties of meteoritic material, but that is only of limited value in explaining the behavior of meteors, since the microscopic bulk properties are largely unrelated to the material properties extended over a meter-class or larger body. This is why we don't usually know much about the class of material producing a large fireball until an actual recovery is made. The fireball observations alone simply aren't enough. In fact, the best information on possible material comes not from how the meteor breaks up, but from the deceleration profile and mass estimates. Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/27/2013 11:52 AM, Pict wrote: Chris, Working on oil and gas wells it is routine to test the fracture point of the rock at the bottom of the well after having run and cemented a casing string (leak off test). You do this by shutting in the well at surface and pumping incremental volumes of mud into the hole and noting the rise in surface pressure with each injection. When the rock is behaving elastically the rise in pressure is linear with volume, but you can see when the rock has reached its elastic limit when the pressure increase with volume becomes less. This occurs at the onset of fracture generation, and continued pumping typically results in extensive fracture propagation and an actual lowering of surface pressure as it is dissipated by mud flowing into the fractures. Same principal is employed with hydraulic fracturing to increase production surface from low permeability lithologies (shale etc). Empirically testing the fracture point of the rock gives you a handle on the maximum mud density the well can sustain when drilling the next hole section, and the maximum pressure one could hold at surface with the BOP in the event of encountering formation pressure in excess of the mud hydrostatic. If you exceed the fracture pressure by increasing the mud 'weight' (density) to control formation pressure, the danger is you induce fractures, lose height in your your mud column as it drains into the wellbore thereby reducing hydrostatic pressure at the bottom of the well and thereby risking falling below the formation pressure inducing the well to flow (kick) or blowout in the worst case. Shutting a flowing well in with the BOP when the formation pressure is higher than the mud hydrostatic (I.e. Flowing) you ideally do not want the surface pressure plus the mud hydrostatic to exceed the 'leak off' as then you run the risk of an underground blowout where the high formation pressure flowing zone breaks down a weaker zone (generally higher up) and flows formation fluid (oil/water/gas) into it displacing the mud present between the two zones. I apologise for the off topic background above but I am wondering if the disintegration mechanism is analogous for a meteor. The pressures you quote at the leading surface of the meteor are in the typical range I would expect from the well experience. Presumably the pressure at the rear is relatively low, and the pressure cannot dissipate around the object due to the speed of entry exceeding the speed of flow of compressed air around it. So if this pressure differential is applied to the front of the object there must come a point where the elastic limit is breached, fractures are induced, and then rapidly propagate. Once there are multiple paths of pressure communication through the former solid object rather than around it, there is presumably a rapid lowering of differential pressure from front to rear occurring as air rushes through the gaps between the fractured pieces and expands as the pressure lowers towards the rear of the disintegrating meteor pushing everything apart (I.e. Exploding). As Chris says this also vastly increases the surface area for incandescence and the the luminosity might be expected to greatly increase. I am wondering if this is at all a realistic description of what
Re: [meteorite-list] Possible that comet will hit mars next year!!!
Hello Graham, With the current orbit from the MPC, my simulation has it missing Mars by a little over 700,000km, or about the same distance again from the MRO as MRO is from Mars at its furthest (according to what I've read of its altitude above the surface). Of course, I think everyone is anxiously awaiting every update as we get closer, to close the gap on uncertainty! I've yet to be able to dig up orbital elements for MRO. By my simulation, HST will be on the other side of the planet from closest approach and its view will be occluded. I'd love to figure out where MRO will be though - assuming that this first-blush ends-up being anywhere close to reality, and MRO is in position to train its instrumentation on C/2013 A1, and being the same distance from the comet that it is from Mars, the science could be _incredibly fortunate_, MRO paying for itself twice! --- Jodie Wednesday, February 27, 2013, 4:38:24 AM, you wrote: Has anyone come across this yet...unlikelybut would be quite an event? Just got this message from my nephew at Oxford Uni... There is a (admittedly slight) chance that a recently discovered comet, C/2013 A1 (Siding Spring), might be on a collision course with Mars in October 2014. Latest observations certainly include an impact possibility within the range of error. If it hits, estimates suggest a 500km wide, 2km deep crater arising from a ~20 Petaton event. That's something like 4 million times the (estimated) explosive power of the current global nuclear arsenal. Would be interesting to watch and see if any of the rovers on the surface manage to survive such an impact (I would imagine only possibly Curiosity but keeping lines of communication open with it might prove difficult). Might make for (eventually, but not in our lifetimes) some interesting future Martian meteorites. http://www.universetoday.com/100298/is-a-comet-on-a-collision-course-with-mars/ Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodiemailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Hi Carl- For the most part, breakup characteristics don't correlate well with either size or material. I think it's largely a matter of the bulk properties of the meteoroid- how monolithic versus faulted it is- and any material can exist on a wide range between those extremes. For the most part, I'd say if there's any sweet-spot, it is largely determined by the same factors that have been seen as key for a long time- a shallow entry angle, low entry speed, and low altitude terminal explosion all bode well for meteorite production. Of course, larger bodies have more material, and might well be expected to yield more meteorites under equivalent entry conditions. But that's a very broad generalization. I think that the nature of the terminal explosion of Chelyabinsk resulted in such tiny fragmentation that something in excess of 99% of the initial mass was lost. A somewhat stronger body of the same size might have survived a little longer, slowing enough that the disruption would be less violent, and a lot more could survive. Consider that Sikhote-Alin was a smaller body, but much more material survived to the ground- both because it was materially stronger, and because it didn't explode until it was much lower. Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/27/2013 10:42 AM, Carl Agee wrote: Hi Chris, Do you have any references you could point me to for how break-up scales with size-mass-physical properties etc. of meteoroids. I am interested in knowing the sweet-spot for yielding meteorites on the ground. In other words, when is a meteoroid too small or too big to produce significant large pieces of surviving material? It seems like Chelyabinsk is outside the sweet spot as it apparently produced mostly fragments even though it had large mass. On the other hand much bigger masses may also survive. Is it bimodal? Thanks, Carl Agee __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Possible that comet will hit mars next year!!!
Should be amazing for comets over the next couple of years then... Graham On Wed, Feb 27, 2013 at 8:03 PM, Jodie Reynolds spacero...@spaceballoon.org wrote: Hello Graham, With the current orbit from the MPC, my simulation has it missing Mars by a little over 700,000km, or about the same distance again from the MRO as MRO is from Mars at its furthest (according to what I've read of its altitude above the surface). Of course, I think everyone is anxiously awaiting every update as we get closer, to close the gap on uncertainty! I've yet to be able to dig up orbital elements for MRO. By my simulation, HST will be on the other side of the planet from closest approach and its view will be occluded. I'd love to figure out where MRO will be though - assuming that this first-blush ends-up being anywhere close to reality, and MRO is in position to train its instrumentation on C/2013 A1, and being the same distance from the comet that it is from Mars, the science could be _incredibly fortunate_, MRO paying for itself twice! --- Jodie Wednesday, February 27, 2013, 4:38:24 AM, you wrote: Has anyone come across this yet...unlikelybut would be quite an event? Just got this message from my nephew at Oxford Uni... There is a (admittedly slight) chance that a recently discovered comet, C/2013 A1 (Siding Spring), might be on a collision course with Mars in October 2014. Latest observations certainly include an impact possibility within the range of error. If it hits, estimates suggest a 500km wide, 2km deep crater arising from a ~20 Petaton event. That's something like 4 million times the (estimated) explosive power of the current global nuclear arsenal. Would be interesting to watch and see if any of the rovers on the surface manage to survive such an impact (I would imagine only possibly Curiosity but keeping lines of communication open with it might prove difficult). Might make for (eventually, but not in our lifetimes) some interesting future Martian meteorites. http://www.universetoday.com/100298/is-a-comet-on-a-collision-course-with-mars/ Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodiemailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New measures to protect fossils
I think all Chinese goods should be taken off of the U.S. market until they are proven worthy. Fake Chinese medications that made it into American pharmacies almost killed my mother-in-law. I had a GE microwave that failed after 13 months. I thought it had a lifetime warranty but after reading the small print it was a limited lifetime warranty The only things covered for a lifetime were the hinges, door handle and power cord. The rest was covered for 12 months. I turned it around and was appalled to see the made in China sticker on the back of a GE appliance! I also had an Igloo stainless steel bar fridge fail after 8 months with nearly the same warranty as the GE appliance. I was simply out the money on the GE but got a new Igloo fridge which failed again after 14 months. It could have caught my garage on fire as it was a smoker! Doesn't anybody take pride in workmanship these days? I think fake Chinese fossils, meteorites, artifacts, gemstones and anything else they can make a buck on are the least of our concerns! I am sure people have died due to bogus Chinese medications. I won't touch generic meds! It seems these days our own government cares very little otherwise they would do something about it. Adam - Original Message - From: Galactic Stone Ironworks meteoritem...@gmail.com To: Paul H. inselb...@cox.net Cc: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 10:14 AM Subject: Re: [meteorite-list] New measures to protect fossils They should be working on a way to stop the flow of fake fossils out of China. Half of the fossils coming out of China now are bogus. I wouldn't touch a Chinese fossil with the proverbial ten-foot pole. Best regards, MikeG On 2/27/13, Paul H. inselb...@cox.net wrote: New measures to protect fossils By WANG QIAN, chinadaily, February 27, 2013 http://usa.chinadaily.com.cn/china/2013-02/27/content_16261862.htm The article does not say anything about meteorites. However, if they are rethinking rules about fossils, they might also be rethinking the rules about meteorites. A compilation of web pages about rock and fossil collecting for various states and countries is Fruitbat's Pdf Library - Fossil Collecting – Management, Laws And Regulations at http://www.thefossilforum.com/index.php/topic/18378-fruitbats-pdf-library-fossil-collecting-management-laws-and-regulations/ Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Watch out for ebay buyer caue they know nothing about meteorite collecting.
Hello Listers Watch out for ebay buyer peterbilt701 It seems he knows nothing about meteorites and left a negative comment about a 354mg Valera meteorite fragment he won from me which is down below... Next time I will go out to my gravel pit and type up some BS about a rock Buyer: Member id peterbilt701 ( Feedback Score Of 29) Feb-27-13 05:29 http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2userid=peterbilt701ftab=FeedbackLeftForOthers FYI about this buyer and hope sellers on ebay wont have to deal with him and get bashed. Shawn Alan IMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Watch out for ebay buyer caue they know nothing about meteorite collecting.
Hello Shawn, Wow, that's a lot of documentation for a $12 meteorite, I think he got a, dare I say, killer deal? Seriously, that guy's a moron. --- Jodie Wednesday, February 27, 2013, 12:50:01 PM, you wrote: Hello Listers Watch out for ebay buyer peterbilt701 It seems he knows nothing about meteorites and left a negative comment about a 354mg Valera meteorite fragment he won from me which is down below... Next time I will go out to my gravel pit and type up some BS about a rock Buyer: Member id peterbilt701 ( Feedback Score Of 29) Feb-27-13 05:29 http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2userid=peterbilt701ftab=FeedbackLeftForOthers FYI about this buyer and hope sellers on ebay wont have to deal with him and get bashed. Shawn Alan IMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodiemailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Watch out for ebay buyer caue they knownothing about meteorite collecting.
Very sad Shawn. Maybe you can keep a watch on him so that when he sells something you can buy it and when it is in your possession, you send him the favor back with negative feedback! Sincerely Don Merchant Founder-Cosmic Treasures Celestial Wonders www.ctreasurescwonders.com IMCA #0960 - Original Message - From: Jodie Reynolds spacero...@spaceballoon.org To: Shawn Alan photoph...@yahoo.com Cc: Meteorite Central meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 3:56 PM Subject: Re: [meteorite-list] Watch out for ebay buyer caue they knownothing about meteorite collecting. Hello Shawn, Wow, that's a lot of documentation for a $12 meteorite, I think he got a, dare I say, killer deal? Seriously, that guy's a moron. --- Jodie Wednesday, February 27, 2013, 12:50:01 PM, you wrote: Hello Listers Watch out for ebay buyer peterbilt701 It seems he knows nothing about meteorites and left a negative comment about a 354mg Valera meteorite fragment he won from me which is down below... Next time I will go out to my gravel pit and type up some BS about a rock Buyer: Member id peterbilt701 ( Feedback Score Of 29) Feb-27-13 05:29 http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2userid=peterbilt701ftab=FeedbackLeftForOthers FYI about this buyer and hope sellers on ebay wont have to deal with him and get bashed. Shawn Alan IMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodiemailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Watch out for ebay buyer caue they know nothing about meteorite collecting.
One more reason I gave up on eBay long ago - idiot buyers. Isn't it great to pay eBay money for fees and get treated like garbage in return? I'd rather flush specimens down the toliet than list them on eBay. Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - On 2/27/13, Shawn Alan photoph...@yahoo.com wrote: Hello Listers Watch out for ebay buyer peterbilt701 It seems he knows nothing about meteorites and left a negative comment about a 354mg Valera meteorite fragment he won from me which is down below... Next time I will go out to my gravel pit and type up some BS about a rock Buyer: Member id peterbilt701 ( Feedback Score Of 29) Feb-27-13 05:29 http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2userid=peterbilt701ftab=FeedbackLeftForOthers FYI about this buyer and hope sellers on ebay wont have to deal with him and get bashed. Shawn Alan IMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Possible that comet will hit mars next year!!!
Break out the 100mm binoculars and get ready. Time to go comet chasin again. I have about 5 or 6 under my belt, but I'll need darker skies this time around. I'm now living on the outskirts of Tampa, and the light pollution is pretty bad here. I'll need to drive about an hour north of here and get out into boonies so I can catch some comets - when the time comes. :) Let's hope a 2013 comet puts on a big show like comet Holmes did. Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - On 2/27/13, Jodie Reynolds spacero...@spaceballoon.org wrote: Hello Graham, With the current orbit from the MPC, my simulation has it missing Mars by a little over 700,000km, or about the same distance again from the MRO as MRO is from Mars at its furthest (according to what I've read of its altitude above the surface). Of course, I think everyone is anxiously awaiting every update as we get closer, to close the gap on uncertainty! I've yet to be able to dig up orbital elements for MRO. By my simulation, HST will be on the other side of the planet from closest approach and its view will be occluded. I'd love to figure out where MRO will be though - assuming that this first-blush ends-up being anywhere close to reality, and MRO is in position to train its instrumentation on C/2013 A1, and being the same distance from the comet that it is from Mars, the science could be _incredibly fortunate_, MRO paying for itself twice! --- Jodie Wednesday, February 27, 2013, 4:38:24 AM, you wrote: Has anyone come across this yet...unlikelybut would be quite an event? Just got this message from my nephew at Oxford Uni... There is a (admittedly slight) chance that a recently discovered comet, C/2013 A1 (Siding Spring), might be on a collision course with Mars in October 2014. Latest observations certainly include an impact possibility within the range of error. If it hits, estimates suggest a 500km wide, 2km deep crater arising from a ~20 Petaton event. That's something like 4 million times the (estimated) explosive power of the current global nuclear arsenal. Would be interesting to watch and see if any of the rovers on the surface manage to survive such an impact (I would imagine only possibly Curiosity but keeping lines of communication open with it might prove difficult). Might make for (eventually, but not in our lifetimes) some interesting future Martian meteorites. http://www.universetoday.com/100298/is-a-comet-on-a-collision-course-with-mars/ Graham __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodiemailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Watch out for ebay buyer caue they know nothing about meteorite collecting
Seems the guy's feedback shows he usually buys nothing except from the automotive section. It's too bad you can't change your feedback to him. Garry - One more reason I gave up on eBay long ago - idiot buyers. Isn't it great to pay eBay money for fees and get treated like garbage in return? I'd rather flush specimens down the toliet than list them on eBay. Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - On 2/27/13, Shawn Alan photoph...@yahoo.com wrote: Hello Listers Watch out for ebay buyer peterbilt701 It seems he knows nothing about meteorites and left a negative comment about a 354mg Valera meteorite fragment he won from me which is down below... Next time I will go out to my gravel pit and type up some BS about a rock Buyer: Member id peterbilt701 ( Feedback Score Of 29) Feb-27-13 05:29 http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2userid=peterbilt701ftab=FeedbackLeftForOthers FYI about this buyer and hope sellers on ebay wont have to deal with him and get bashed. Shawn Alan IMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD: New Specimens, old falls, and more
Dear List Members, I uploaded many new specimens to my sales page today. There are quite a few numbered and ex. museum pieces as well as some neat odds and ends: http://www.historicmeteorites.com/Sales.html Additionally, I have uploaded many specimens to eBay including a handful of 99 cent starting auctions and some nice unclassified stones. www.ebay.com/sch/historic-meteorites/m.html Thanks for looking and have a great week! -- Mike Bandli Historic Meteorites www.HistoricMeteorites.com and join us on Facebook: www.facebook.com/Meteorites1 IMCA #5765 --- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New measures to protect fossils
Sorry for replying off topic, but this is the latest Chinese scam out there. And we thought we had seen it all. http://www.treehugger.com/green-food/fake-concrete-filled-walnuts-sold-china.html Life is what happens to you while you're busy making other plans. John Lennon - Original Message - From: Adam Hupe raremeteori...@yahoo.com To: Adam meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 2:46 PM Subject: Re: [meteorite-list] New measures to protect fossils I think all Chinese goods should be taken off of the U.S. market until they are proven worthy. Fake Chinese medications that made it into American pharmacies almost killed my mother-in-law. I had a GE microwave that failed after 13 months. I thought it had a lifetime warranty but after reading the small print it was a limited lifetime warranty The only things covered for a lifetime were the hinges, door handle and power cord. The rest was covered for 12 months. I turned it around and was appalled to see the made in China sticker on the back of a GE appliance! I also had an Igloo stainless steel bar fridge fail after 8 months with nearly the same warranty as the GE appliance. I was simply out the money on the GE but got a new Igloo fridge which failed again after 14 months. It could have caught my garage on fire as it was a smoker! Doesn't anybody take pride in workmanship these days? I think fake Chinese fossils, meteorites, artifacts, gemstones and anything else they can make a buck on are the least of our concerns! I am sure people have died due to bogus Chinese medications. I won't touch generic meds! It seems these days our own government cares very little otherwise they would do something about it. Adam - Original Message - From: Galactic Stone Ironworks meteoritem...@gmail.com To: Paul H. inselb...@cox.net Cc: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 10:14 AM Subject: Re: [meteorite-list] New measures to protect fossils They should be working on a way to stop the flow of fake fossils out of China. Half of the fossils coming out of China now are bogus. I wouldn't touch a Chinese fossil with the proverbial ten-foot pole. Best regards, MikeG On 2/27/13, Paul H. inselb...@cox.net wrote: New measures to protect fossils By WANG QIAN, chinadaily, February 27, 2013 http://usa.chinadaily.com.cn/china/2013-02/27/content_16261862.htm The article does not say anything about meteorites. However, if they are rethinking rules about fossils, they might also be rethinking the rules about meteorites. A compilation of web pages about rock and fossil collecting for various states and countries is Fruitbat's Pdf Library - Fossil Collecting – Management, Laws And Regulations at http://www.thefossilforum.com/index.php/topic/18378-fruitbats-pdf-library-fossil-collecting-management-laws-and-regulations/ Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] [off topic] New measures to protect fossils
The Ministry of Tofu? Make that the Ministry of Meteorites, some time soon. Get your cement achondrites, your hematite irons, and other assorted fakes from China, at a really good price! But hey, I got this really nice 5g achondrite from Vesta for only $20.00! Fred PS: Or you can come to Colorado and get your fake meteorites from Steve C. (unless he is back in jail!) Sorry for replying off topic, but this is the latest Chinese scam out there. And we thought we had seen it all. http://www.treehugger.com/green-food/fake-concrete-filled-walnuts-sold-china.html  Life is what happens to you while you're busy making other plans. John Lennon - Original Message - From: Adam Hupe raremeteori...@yahoo.com To: Adam meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 2:46 PM Subject: Re: [meteorite-list] New measures to protect fossils I think all Chinese goods should be taken off of the U.S. market until they are proven worthy. Fake Chinese medications that made it into American pharmacies almost killed my mother-in-law. I had a GE microwave that failed after 13 months. I thought it had a lifetime warranty but after reading the small print it was a limited lifetime warranty The only things covered for a lifetime were the hinges, door handle and power cord. The rest was covered for 12 months. I turned it around and was appalled to see the made in China sticker on the back of a GE appliance! I also had an Igloo stainless steel bar fridge fail after 8 months with nearly the same warranty as the GE appliance. I was simply out the money on the GE but got a new Igloo fridge which failed again after 14 months. It could have caught my garage on fire as it was a smoker! Doesn't anybody take pride in workmanship these days? I think fake Chinese fossils, meteorites, artifacts, gemstones and anything else they can make a buck on are the least of our concerns! I am sure people have died due to bogus Chinese medications. I won't touch generic meds! It seems these days our own government cares very little otherwise they would do something about it. Adam  - Original Message - From: Galactic Stone Ironworks meteoritem...@gmail.com To: Paul H. inselb...@cox.net Cc: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 10:14 AM Subject: Re: [meteorite-list] New measures to protect fossils They should be working on a way to stop the flow of fake fossils out of China. Half of the fossils coming out of China now are bogus. I wouldn't touch a Chinese fossil with the proverbial ten-foot pole. Best regards, MikeG On 2/27/13, Paul H. inselb...@cox.net wrote: New measures to protect fossils By WANG QIAN, chinadaily, February 27, 2013 http://usa.chinadaily.com.cn/china/2013-02/27/content_16261862.htm The article does not say anything about meteorites. However, if they are rethinking rules about fossils, they might also be rethinking the rules about meteorites. A compilation of web pages about rock and fossil collecting for various states and countries is Fruitbat's Pdf Library - Fossil Collecting â Management, Laws And Regulations at http://www.thefossilforum.com/index.php/topic/18378-fruitbats-pdf-library-fossil-collecting-management-laws-and-regulations/ Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] [off topic] New measures to protect fossils
Unfortunately you are correct, we are to blame. I think we are becoming a Wall Mart society where Chinese garbage is tolerated by people with an everything including people are disposable attitude. Why else would anybody purchase products with labels on them like Genuine intimation chrome plated plastic knobs, Genuine Pleather, Simulated Naugahyde or Realistic hard wood? Have you ever notice a woozy feeling after being in Wall Mart for more than a few minutes? My best guess it is all of the Chinese products degassing Benzene, Dioxins and other deadly gasses used in manufacture. Without Wall Mart, I am sure the Chinese economy would be crippled. Enough from me, now lets talk about the number one marketeer of fake iron meteorites, You guessed it, Adam - Original Message - From: h...@meteorhall.com h...@meteorhall.com To: Garry Stewart xe...@yahoo.com Cc: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 1:51 PM Subject: Re: [meteorite-list] [off topic] New measures to protect fossils The Ministry of Tofu? Make that the Ministry of Meteorites, some time soon. Get your cement achondrites, your hematite irons, and other assorted fakes from China, at a really good price! But hey, I got this really nice 5g achondrite from Vesta for only $20.00! Fred PS: Or you can come to Colorado and get your fake meteorites from Steve C. (unless he is back in jail!) Sorry for replying off topic, but this is the latest Chinese scam out there. And we thought we had seen it all. http://www.treehugger.com/green-food/fake-concrete-filled-walnuts-sold-china.html  Life is what happens to you while you're busy making other plans. John Lennon - Original Message - From: Adam Hupe raremeteori...@yahoo.com To: Adam meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 2:46 PM Subject: Re: [meteorite-list] New measures to protect fossils I think all Chinese goods should be taken off of the U.S. market until they are proven worthy. Fake Chinese medications that made it into American pharmacies almost killed my mother-in-law. I had a GE microwave that failed after 13 months. I thought it had a lifetime warranty but after reading the small print it was a limited lifetime warranty The only things covered for a lifetime were the hinges, door handle and power cord. The rest was covered for 12 months. I turned it around and was appalled to see the made in China sticker on the back of a GE appliance! I also had an Igloo stainless steel bar fridge fail after 8 months with nearly the same warranty as the GE appliance. I was simply out the money on the GE but got a new Igloo fridge which failed again after 14 months. It could have caught my garage on fire as it was a smoker! Doesn't anybody take pride in workmanship these days? I think fake Chinese fossils, meteorites, artifacts, gemstones and anything else they can make a buck on are the least of our concerns! I am sure people have died due to bogus Chinese medications. I won't touch generic meds! It seems these days our own government cares very little otherwise they would do something about it. Adam  - Original Message - From: Galactic Stone Ironworks meteoritem...@gmail.com To: Paul H. inselb...@cox.net Cc: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 10:14 AM Subject: Re: [meteorite-list] New measures to protect fossils They should be working on a way to stop the flow of fake fossils out of China. Half of the fossils coming out of China now are bogus. I wouldn't touch a Chinese fossil with the proverbial ten-foot pole. Best regards, MikeG On 2/27/13, Paul H. inselb...@cox.net wrote: New measures to protect fossils By WANG QIAN, chinadaily, February 27, 2013 http://usa.chinadaily.com.cn/china/2013-02/27/content_16261862.htm The article does not say anything about meteorites. However, if they are rethinking rules about fossils, they might also be rethinking the rules about meteorites. A compilation of web pages about rock and fossil collecting for various states and countries is Fruitbat's Pdf Library - Fossil Collecting – Management, Laws And Regulations at http://www.thefossilforum.com/index.php/topic/18378-fruitbats-pdf-library-fossil-collecting-management-laws-and-regulations/ Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS -
Re: [meteorite-list] Watch out for ebay buyer caue they know nothing about meteorite collecting.
Mike G Let me know when you want to flush your meteorites, cause Ill save you the hassle and you can mail them to me :) And I have blocked this buyer, so I wont have to deal with him again and hope other seller have done the same. SA Shawn AlanIMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ From: Galactic Stone Ironworks meteoritem...@gmail.com To: Shawn Alan photoph...@yahoo.com Cc: Meteorite Central meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 4:13 PM Subject: Re: [meteorite-list] Watch out for ebay buyer caue they know nothing about meteorite collecting. One more reason I gave up on eBay long ago - idiot buyers. Isn't it great to pay eBay money for fees and get treated like garbage in return? I'd rather flush specimens down the toliet than list them on eBay. Best regards, MikeG -- - Web - http://www.galactic-stone.com/ Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - On 2/27/13, Shawn Alan photoph...@yahoo.com wrote: Hello Listers Watch out for ebay buyer peterbilt701 It seems he knows nothing about meteorites and left a negative comment about a 354mg Valera meteorite fragment he won from me which is down below... Next time I will go out to my gravel pit and type up some BS about a rock Buyer: Member id peterbilt701 ( Feedback Score Of 29) Feb-27-13 05:29 http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2userid=peterbilt701ftab=FeedbackLeftForOthers FYI about this buyer and hope sellers on ebay wont have to deal with him and get bashed. Shawn Alan IMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ __ Visit the Archives at http://www.meteorite-list-archives.com/ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Chris, there are indeed obvious differences. However, typically in leak-off tests you are applying pressure to a relatively small area, maybe inside a cylinder 6ft long and 1ft in diameter (you might typically drill 2m of new formation below the casing shoe prior to the test). The rock is however prestressed by the overburden load and formation pore pressure so that needs to be overcome to an extent before 'expansional' stress is applied to the matrix itself. Once the 'preloading' is overcome however, I think perhaps it is an analogous situation - a small volume of rock with a significant stress gradient across it. I really was wondering what happens to the pressure distribution around the meteor when a multitude of fractures rapidly propagate through a monolithic body offering additional pathways for pressure equalisation front to rear, and if the resulting redistribution of pressure through these fracture pathways could be a mechanism to change a solid body into a dispersed cloud of rubble (i.e. Blow it up) rather than a fragmented rock continuing in tight formation. I'm sure it's a complicated scenario to model. Alternatively, the vastly increased surface area from the near instantaneous formation of a multitude of pieces might be the cause because of a sharp rise in drag drastically augmenting thermal dissipation of kinetic energy. Seems an equally plausible explanation within the confines of my imagination. Regards, John On 27/02/2013 12:58, Chris Peterson c...@alumni.caltech.edu wrote: Hi John- I don't doubt that there are analogs between the fracturing you describe at the bottom of a well and what happens with a meteor. However, there may be some fundamental material differences. The rock at the bottom of the well is typically very large compared with the area where pressure is applied, and is already under high pressure. A meteoroid may range from nearly monolithic (particularly in the case of an iron body) to something like a rubble pile. Obviously, the response to a non-isotropic force from ram pressure will be very different in those cases. I'm not sure what happens to water during meteoritic flight. Most meteor trails are largely composed of dust, but if water trails are observed, I suspect they are largely produced in the same way that many airplane contrails are- the condensation of existing atmospheric water vapor onto solid particles, particularly in response to aerodynamic effects such as vortex production. There is lots of published information on the material properties of meteoritic material, but that is only of limited value in explaining the behavior of meteors, since the microscopic bulk properties are largely unrelated to the material properties extended over a meter-class or larger body. This is why we don't usually know much about the class of material producing a large fireball until an actual recovery is made. The fireball observations alone simply aren't enough. In fact, the best information on possible material comes not from how the meteor breaks up, but from the deceleration profile and mass estimates. Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/27/2013 11:52 AM, Pict wrote: Chris, Working on oil and gas wells it is routine to test the fracture point of the rock at the bottom of the well after having run and cemented a casing string (leak off test). You do this by shutting in the well at surface and pumping incremental volumes of mud into the hole and noting the rise in surface pressure with each injection. When the rock is behaving elastically the rise in pressure is linear with volume, but you can see when the rock has reached its elastic limit when the pressure increase with volume becomes less. This occurs at the onset of fracture generation, and continued pumping typically results in extensive fracture propagation and an actual lowering of surface pressure as it is dissipated by mud flowing into the fractures. Same principal is employed with hydraulic fracturing to increase production surface from low permeability lithologies (shale etc). Empirically testing the fracture point of the rock gives you a handle on the maximum mud density the well can sustain when drilling the next hole section, and the maximum pressure one could hold at surface with the BOP in the event of encountering formation pressure in excess of the mud hydrostatic. If you exceed the fracture pressure by increasing the mud 'weight' (density) to control formation pressure, the danger is you induce fractures, lose height in your your mud column as it drains into the wellbore thereby reducing hydrostatic pressure at the bottom of the well and thereby risking falling below the formation pressure inducing the well to flow (kick) or blowout in the worst case. Shutting a flowing well in with the BOP when the formation pressure is higher than the mud hydrostatic (I.e. Flowing) you ideally do not want the
[meteorite-list] sharp protrusion from an iron meteorite
I recieved a well prepared letter from a fellow with a question that I can't begin to answer. Maybe someone on the list has seen this kind of thing before. He bought a Baygorria (Iron, IAB complex) from a dealer 3 years ago. He picked it up recently to find a metal protrusion sticking out of the thing that was sharp enough to prick his thumb. Here's a jpg of his scanned photo. http://meteorites.wustl.edu/baygorria.jpg What's happened here? Randy Korotev St. Louis __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] sharp protrusion from an iron meteorite
Isn't Baygorria another meteorite with a fake provenance? Basically a cleaned up Campo with a delaminated section protruding after a not-so-careful makeover. I would just tell him to seek first aid so he doesn't catch the dreaded Lawrencite disease. Adam - Original Message - From: Randy Korotev koro...@wustl.edu To: meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 2:41 PM Subject: [meteorite-list] sharp protrusion from an iron meteorite I recieved a well prepared letter from a fellow with a question that I can't begin to answer. Maybe someone on the list has seen this kind of thing before. He bought a Baygorria (Iron, IAB complex) from a dealer 3 years ago. He picked it up recently to find a metal protrusion sticking out of the thing that was sharp enough to prick his thumb. Here's a jpg of his scanned photo. http://meteorites.wustl.edu/baygorria.jpg What's happened here? Randy Korotev St. Louis __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] sharp protrusion from an iron meteorite
My guess is the the metal was pushed out due to oxidization. The metal seems to be protruding from a crack. I'm thinking moisture made its way into the crack and as the iron oxide formed, it forced the metal to cleave and then pushed the metal up. Mendy Ouzillou On Feb 27, 2013, at 11:41 PM, Randy Korotev koro...@wustl.edu wrote: I recieved a well prepared letter from a fellow with a question that I can't begin to answer. Maybe someone on the list has seen this kind of thing before. He bought a Baygorria (Iron, IAB complex) from a dealer 3 years ago. He picked it up recently to find a metal protrusion sticking out of the thing that was sharp enough to prick his thumb. Here's a jpg of his scanned photo. http://meteorites.wustl.edu/baygorria.jpg What's happened here? Randy Korotev St. Louis __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] OT-sort of - Sci-fi Comet killer using Microwave Blast Weapon
Interesting question and no so much in the annals of just sci-fi but one to be thought through. One of my mentors with a lot of experience in the Apollo program had the inspiration to microwave lunar soil and found it formed a glassy concrete. A lot of research was prepared during the return to the moon initiative for robotic solar powered microwave pavers to go to the moon and prepare landing pads and shelters. What makes the moon regolith suitable is the content of iron nickel powder from pulverized micro-meteorites. The point being is that some design work was already explored on space/lunar based microwave excavators/pavers. From what we believe about low metal but high solid-water and hydrocarbon content of comets, it would probably be a different reaction: triggering outgassing and an accelerated change of mass and ergo Delta T /orbit. I would imagine it would take a swarm of these microwave robots to effect a change more like a hive of thousands of the suitcase variety rather than one or two massive slicer dicers. They would also have to have Topaz-like power generators as solar panels would be less efficient and get in the way of decomposing comet. The microwave unit is a minor comparatively speaking off the shelf scale-able technology. Steering thruster arrays are also off the shelf. Right now the Russians are the only nation with major lift to put massive numbers out of Earth Orbit, I assume. Seems like it is a matter of integrating off the shelf technologies to put a swarm of interacting drone-like microwave excavators in a catch up approach to some future threat. Elton From: drtanuki drtan...@yahoo.com To: meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 2:24 PM Subject: [meteorite-list] OT-sort of - Sci-fi Comet killer using Microwave Blast Weapon List, Sorry for the sci-fi off-topic sort of question. Given IF we can get close enough to a comet body how effective would a microwave weapon be and is it possible to launch a large enough microwave weapon into space? Thank you. Dirk Ross...Tokyo Yes, we have 2 comets visible this year. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD, HED, LOT OC , Imilchil small pallasite and few items
Hello List i have some few items for sale, HED, small pallasite, imilchil nice lot,and lot OC at good prices PM me if you are interested best greetings -- Rachid Chaoui IMCA # 4157 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] MRO HiRISE Images - February 20, 2013
MARS RECONNAISSANCE ORBITER HIRISE IMAGES February 20, 2013 o Fault in Ius Chasma http://hirise.lpl.arizona.edu/ESP_025231_1720 This image in Ius Chasma, a portion of the massive canyon system Vallis Marineris, draws our attention because a fault previously imaged by the Mars Orbiter Camera. o Cratered Cones in the Cydonia Region http://hirise.lpl.arizona.edu/ESP_025439_2210 This observation focuses on an unusally high density of cratered cones, imaged previously by the Mars Orbiter Camera. These cones could possibly be mud volcanoes. o More Impact Craters from MSL http://hirise.lpl.arizona.edu/ESP_030524_1755 MSL released 8 tungsten masses during its entry and descent, leaving some resulting craters we captured enhanced color. o Delta Structure in Eberswalde Crater http://hirise.lpl.arizona.edu/PSP_001336_1560 This delta is distinguished from other fan-shaped deposits on Mars by the presence of a preserved distributary network including lobes, inverted channels, and meander cutoffs. All of the HiRISE images are archived here: http://hirise.lpl.arizona.edu/ Information about the Mars Reconnaissance Orbiter is online at http://www.nasa.gov/mro. The mission is managed by NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, for the NASA Science Mission Directorate, Washington, D.C. Lockheed Martin Space Systems, of Denver, is the prime contractor and built the spacecraft. HiRISE is operated by the University of Arizona. Ball Aerospace and Technologies Corp., of Boulder, Colo., built the HiRISE instrument. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Watch out for ebay buyer caue they know
I have bought a number of meteorites from the good folks on THIS meteorite list. eBay is fine, the BUYER has to know the seller. They need to do their homework or they run the risk of getting ripped off. It's no different than any other sale. KNOW YOUR SELLER folks, don't trust people you don't know. ASK AROUND. Ask people on this list. Ask ME. ASK! Point people to this meteorite list. If ANY of that Russian meteorite gets on the market you can bet I'll be buying it from someone on THIS list. If affordable of coarse! Regards! Tom __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] I have heard the Chelyabinsk Meteorite could be classified as a ........
Hello Listers I have heard that the Chelyabinsk Meteorite fall could be a LL5?? Any thoughts on that. I for one do not have the eye for that, but I have been told that who did some slicing of this meteorite said from what they could tell that it could be an LL5 from looking at it in person. Here are some images someone sent me of the Chelyabinsk Meteorite fragments http://image.tsn.ua/media/images2/original/Feb2013/383747428.jpg http://img1.1tv.ru/imgsize640x360/PR20130225151539.JPG http://www.apiural.ru/UserFiles/Storage/ContentPhoto/0/0/63/6343_original.jpg Shawn Alan IMCA 1633 ebay store http://www.ebay.com/sch/imca1633ny/m.html http://meteoritefalls.com/ __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] AD: Oriented TAZA
That is one of the coolest oriented meteorites I have ever seen. (Half bullet) Sent from my iPhone On Feb 27, 2013, at 4:00 PM, Ruben Garcia rubengarcia85...@gmail.com wrote: Hi all, Worth seeing even if you're not interested in buying. $3 per gram view it here http://s1066.beta.photobucket.com/user/rubengarcia85382/media/taza004_zps4996dc41.jpg.html -- Rock On! Ruben Garcia http://www.MrMeteorite.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] (AD) a few meteorites for sale
Hi Steve do you have anymore of the sequel slices you posted about a week ago? Don - Original Message - From: steve arnold chicagosteve1...@gmail.com To: meteorite-list Meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 6:53 PM Subject: [meteorite-list] (AD) a few meteorites for sale Hello list. I have a few meteorites for sale. I have a 7 gram imichil iron, $25, I also have (2) 5 gram imichil irons both $20. I also have a small group of small oriented nwa 869 $50, I also have a 344 gram 99.9 % fusion crusted black beauty unclassed stoney. This is a must see. $450 OBO. And finally I have a 171 gram oriented black beauty $375 OBO. This also a unclassed stoney. As usual off list please and it is a new week so 1 ad per week. And free shipping. Thanks and pics upon asking. -- Steve R. Anold, chicago, ill. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] (AD) a few meteorites for sale
Is this some form of new advertising? Steve- You really should correct your name in your signature. If anything, it makes you look more reputable and competent to potential buyers. Just a friendly suggestion :) Best, Brndon D. On Feb 27, 2013, at 6:26 PM, Don Merchant dmerc...@rochester.rr.com wrote: Hi Steve do you have anymore of the sequel slices you posted about a week ago? Don - Original Message - From: steve arnold chicagosteve1...@gmail.com To: meteorite-list Meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 6:53 PM Subject: [meteorite-list] (AD) a few meteorites for sale Hello list. I have a few meteorites for sale. I have a 7 gram imichil iron, $25, I also have (2) 5 gram imichil irons both $20. I also have a small group of small oriented nwa 869 $50, I also have a 344 gram 99.9 % fusion crusted black beauty unclassed stoney. This is a must see. $450 OBO. And finally I have a 171 gram oriented black beauty $375 OBO. This also a unclassed stoney. As usual off list please and it is a new week so 1 ad per week. And free shipping. Thanks and pics upon asking. -- Steve R. Anold, chicago, ill. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Hi Dirk and all! There were so many different pressures placed on this object, not sure you could point to a single one conclusively to answer your question about resonance. You would have to define the causes to consider resonance. I suppose if we knew the air density we could SWAG the ram pressure (which I'd guess may be the single largest contributor) as the mass has already been determined. I have not heard anyone give those details yet. Was the mass determined upon entry or when it burst? It did have some time to ablate. I think the physicists have their work cut out and I look forward to reading about it! In regards to the strewn field. I think it's going to take a lot of time to determine it. They have a great opportunity to record a spectacular strewn field. The frenzy probably hosed that hope up already. With other known strewn fields, such as JaH 073 at ~19.6km long and Franconia at ~17km long, it may take a while to find large fragments. We know in both of these fields, thousands of small 0-20 gram fragments were recovered on the beginning end and middle of the fields and much much larger fragments down field many kilometers away. I am hoping to hear some 40kg + frags are found! Cheers! Jim Wooddell On Wed, Feb 27, 2013 at 11:36 AM, drtanuki drtan...@yahoo.com wrote: Chris and all, I will refine my questions a bit regarding the Russian asteroid (meteoroid) body: Could resonance (differential-harmonics) within the body cause disintegration? Can we expect to see an Earth-ground electrical discharge towards the meteoroid? Is it possible? And could differential electrical charges on the leading and trailing part of the body cause internal disruption leading to disintegration? Thank you. Forgive me if my questions are poorly based or asked. Dirk Ross...Tokyo --- On Thu, 2/28/13, Chris Peterson c...@alumni.caltech.edu wrote: From: Chris Peterson c...@alumni.caltech.edu Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: meteorite-list@meteoritecentral.com Date: Thursday, February 28, 2013, 1:21 AM A body larger than about a centimeter transfers its kinetic energy to other forms primarily by compressing the air in front of it as it descends into the atmosphere. The pressure involved is typically very large- tens or hundreds of megapascals for meter-class bodies. Once this ram pressure exceeds the material strength of the body, it breaks apart (presumably along existing fault lines, so the material properties of the body are important- and generally unknown). Before the breakup, the heat created by compressing air is melting the surface of the meteoroid, resulting in ablation. This ablation is responsible for some of the light we see (along with atmospheric ionization from the same heat source), but is not particularly disruptive to the meteoroid. Only the outer surface is affected. Ablation is a very efficient way of removing energy (which is why spacecraft heat shields prior to the shuttles were ablative). When the meteoroid fragments at hypersonic speeds, however, additional surface area is instantly exposed, resulting in a rapid heating of the surrounding air (which is just a fancy way of saying explosion). If a body breaks into just a few pieces, as is common, we may see a central or terminal brightening. If it completely shatters into thousands of pieces (as seems likely with Chelyabinsk) the energy from the suddenly heated air is immense- an efficient conversion of kinetic energy to thermal energy. The expanding hot air can produce an impressive sonic wave, and probably further disrupts the meteoroid itself. I don't that there are any electrical forces of a significant size to affect the structure or motion of the meteoroid, although atmospheric electrical effects probably occur (e.g. electrophonics). Chris *** Chris L Peterson Cloudbait Observatory http://www.cloudbait.com On 2/26/2013 11:59 PM, drtanuki wrote: Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Jim Wooddell jimwoodd...@gmail.com 928-247-2675 __ Visit the
Re: [meteorite-list] [off topic] New measures to protect fossils
Good evening: Just to continue the rant, you can buy gold coated Tungsten bars in China. They are sold as Executive Novely items or Executive paper weights. I had one company email me with photos and a price list. Here is the story if you are interested. By the way, Tungsten has almost exactly the same density as Gold, 19.3 gm /cc. http://www.businessinsider.com/tungsten-filled-gold-bars-found-in-new-york-2012-9 Murray On Wed, Feb 27, 2013 at 3:20 PM, Adam Hupe raremeteori...@yahoo.com wrote: Unfortunately you are correct, we are to blame. I think we are becoming a Wall Mart society where Chinese garbage is tolerated by people with an everything including people are disposable attitude. Why else would anybody purchase products with labels on them like Genuine intimation chrome plated plastic knobs, Genuine Pleather, Simulated Naugahyde or Realistic hard wood? Have you ever notice a woozy feeling after being in Wall Mart for more than a few minutes? My best guess it is all of the Chinese products degassing Benzene, Dioxins and other deadly gasses used in manufacture. Without Wall Mart, I am sure the Chinese economy would be crippled. Enough from me, now lets talk about the number one marketeer of fake iron meteorites, You guessed it, Adam - Original Message - From: h...@meteorhall.com h...@meteorhall.com To: Garry Stewart xe...@yahoo.com Cc: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 1:51 PM Subject: Re: [meteorite-list] [off topic] New measures to protect fossils The Ministry of Tofu? Make that the Ministry of Meteorites, some time soon. Get your cement achondrites, your hematite irons, and other assorted fakes from China, at a really good price! But hey, I got this really nice 5g achondrite from Vesta for only $20.00! Fred PS: Or you can come to Colorado and get your fake meteorites from Steve C. (unless he is back in jail!) Sorry for replying off topic, but this is the latest Chinese scam out there. And we thought we had seen it all. http://www.treehugger.com/green-food/fake-concrete-filled-walnuts-sold-china.html  Life is what happens to you while you're busy making other plans. John Lennon - Original Message - From: Adam Hupe raremeteori...@yahoo.com To: Adam meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 2:46 PM Subject: Re: [meteorite-list] New measures to protect fossils I think all Chinese goods should be taken off of the U.S. market until they are proven worthy. Fake Chinese medications that made it into American pharmacies almost killed my mother-in-law. I had a GE microwave that failed after 13 months. I thought it had a lifetime warranty but after reading the small print it was a limited lifetime warranty The only things covered for a lifetime were the hinges, door handle and power cord. The rest was covered for 12 months. I turned it around and was appalled to see the made in China sticker on the back of a GE appliance! I also had an Igloo stainless steel bar fridge fail after 8 months with nearly the same warranty as the GE appliance. I was simply out the money on the GE but got a new Igloo fridge which failed again after 14 months. It could have caught my garage on fire as it was a smoker! Doesn't anybody take pride in workmanship these days? I think fake Chinese fossils, meteorites, artifacts, gemstones and anything else they can make a buck on are the least of our concerns! I am sure people have died due to bogus Chinese medications. I won't touch generic meds! It seems these days our own government cares very little otherwise they would do something about it. Adam  - Original Message - From: Galactic Stone Ironworks meteoritem...@gmail.com To: Paul H. inselb...@cox.net Cc: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Sent: Wednesday, February 27, 2013 10:14 AM Subject: Re: [meteorite-list] New measures to protect fossils They should be working on a way to stop the flow of fake fossils out of China. Half of the fossils coming out of China now are bogus. I wouldn't touch a Chinese fossil with the proverbial ten-foot pole. Best regards, MikeG On 2/27/13, Paul H. inselb...@cox.net wrote: New measures to protect fossils By WANG QIAN, chinadaily, February 27, 2013 http://usa.chinadaily.com.cn/china/2013-02/27/content_16261862.htm The article does not say anything about meteorites. However, if they are rethinking rules about fossils, they might also be rethinking the rules about meteorites. A compilation of web pages about rock and fossil collecting for various states and countries is Fruitbat's Pdf Library - Fossil Collecting – Management, Laws And Regulations at
Re: [meteorite-list] Divers Find Russian Meteorite Craters in Chebarkul Lake
I'm very skeptical here. The water would absorb almost all of the kinetic energy. Unless the lake is a few inches deep, craters are highly unlikely. This sounds like more urban legend. Sent from my iPad On Feb 27, 2013, at 10:29 AM, Ron Baalke baa...@zagami.jpl.nasa.gov wrote: http://rt.com/news/russian-meteorite-lake-craters-537/ Divers find Russian meteorite craters in Chebarkul Lake rt.com February 27, 2013 Divers searching Chebarkul Lake in Russia's Urals region have found several craters that may be the impact zones of fragments of the now-famous meteorite that exploded over the area on February 15. The underwater hunt for the rare stones was hampered by cold weather and light-obstructing mud stirred up from the bottom. The divers used powerful lights and probes to uncover several potential sites where meteorite fragments may have landed. On Thursday, a team from Ekaterinburg will join in the search by conducting a magnetic survey of the prospect locations; the initial results could be ready as early as that evening. Some fragments of the meteorite were retrieved in the Chelyabinsk region, which endured the bulk of the spectacular cosmic event. The biggest meteorite chunk discovered was about 1 kilogram. It is hoped that the fragments inside the lake could be much bigger, weighing dozens of kilograms. Videos of the meteorite streaking across Russia's sky proved to be not only awe-inspiring for YouTube, but also served a scientific purpose: Two groups of researchers used the clips to calculate the meteorite's trajectory. Colombian astronomers from the University of Antioquia in Medellin are believed to be the first to report their preliminary results last week at the scientific publishing website arxiv.org. A similar work by researchers at the Astronomical Institute of Czech Academy of Sciences came days later on Monday. Both teams used the proven method of analyzing video footage of the meteorite's descent through a little bit of trigonometry. This time, however, the footage was taken by CCTV, car cameras and smartphones, rather than precisely calibrated observatory recorders. The Russian meteorite was determined to be an Apollo-class asteroid, one of an estimated 5,000 near-Earth bodies orbiting the Sun and occasionally crossing the Earth's orbit. Most of these objects are spread out between the orbits of Venus and Jupiter. Russian astronomers will report their findings later in March, but have already confirmed that the results published by the Columbian and Czech researchers correspond with their findings. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Divers Find Russian Meteorite Craters in Chebarkul Lake
Hi List, Perhaps, maybe, a large mass plunging to the bottom of the lake might result in a disturbance at the bottom of the lake, but I agree that it would not result in a crater under these circumstances. However, they did mention in an article that the bottom of this lake has poor visibility because of fine sediments that are easily disturbed by the slightest motion. What the divers might be seeing is depressions where the sediments have been kicked up and out by the mass as it hit the bottom. Some silts might wash back down and cover the mass, leaving it buried under a thin layer of sediment at the bottom of shallow depression. I guess something like that would be an impact pit, and not a crater. Maybe. Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/GalacticStone Pinterest - http://pinterest.com/galacticstone RSS - http://www.galactic-stone.com/rss/126516 - On 2/27/13, James Beauchamp falco...@sbcglobal.net wrote: I'm very skeptical here. The water would absorb almost all of the kinetic energy. Unless the lake is a few inches deep, craters are highly unlikely. This sounds like more urban legend. Sent from my iPad On Feb 27, 2013, at 10:29 AM, Ron Baalke baa...@zagami.jpl.nasa.gov wrote: http://rt.com/news/russian-meteorite-lake-craters-537/ Divers find Russian meteorite craters in Chebarkul Lake rt.com February 27, 2013 Divers searching Chebarkul Lake in Russia's Urals region have found several craters that may be the impact zones of fragments of the now-famous meteorite that exploded over the area on February 15. The underwater hunt for the rare stones was hampered by cold weather and light-obstructing mud stirred up from the bottom. The divers used powerful lights and probes to uncover several potential sites where meteorite fragments may have landed. On Thursday, a team from Ekaterinburg will join in the search by conducting a magnetic survey of the prospect locations; the initial results could be ready as early as that evening. Some fragments of the meteorite were retrieved in the Chelyabinsk region, which endured the bulk of the spectacular cosmic event. The biggest meteorite chunk discovered was about 1 kilogram. It is hoped that the fragments inside the lake could be much bigger, weighing dozens of kilograms. Videos of the meteorite streaking across Russia's sky proved to be not only awe-inspiring for YouTube, but also served a scientific purpose: Two groups of researchers used the clips to calculate the meteorite's trajectory. Colombian astronomers from the University of Antioquia in Medellin are believed to be the first to report their preliminary results last week at the scientific publishing website arxiv.org. A similar work by researchers at the Astronomical Institute of Czech Academy of Sciences came days later on Monday. Both teams used the proven method of analyzing video footage of the meteorite's descent through a little bit of trigonometry. This time, however, the footage was taken by CCTV, car cameras and smartphones, rather than precisely calibrated observatory recorders. The Russian meteorite was determined to be an Apollo-class asteroid, one of an estimated 5,000 near-Earth bodies orbiting the Sun and occasionally crossing the Earth's orbit. Most of these objects are spread out between the orbits of Venus and Jupiter. Russian astronomers will report their findings later in March, but have already confirmed that the results published by the Columbian and Czech researchers correspond with their findings. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NC VA meteor 27FEB2013
DEar List, NC VA meteor 27FEB2013 approximately 20:15 EST http://lunarmeteoritehunters.blogspot.jp/2013/02/nc-va-fireball-meteor-27feb2013.html Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Hi Dirk, A very small amount of equivalent energy is involved with free electron release. Perhaps the moving electrons cause localized magnetic fields, but far lower than those needed to have large-scale charge separation. I can see the electron clouds on the radar because free electrons are conductive. But energy exchange is kept pretty locally. Now, posing in intriguing situation - lets say a russian-like event occurs over a supercell thunderstorm. It could skim across the anvil. The line of conducting plasma would short circuit the heavily charge separated areas (Charges migrate due to the supercooled freezing process). I think you would get a nice lightshow. Kind of interesting... CC meteortites, low pressure. Volatile amino acids, carbon, and lightning, Would be a nice situation for early life forms. --- On Wed, 2/27/13, drtanuki drtan...@yahoo.com wrote: From: drtanuki drtan...@yahoo.com Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: Garry Stewart xe...@yahoo.com, meteorite-list@meteoritecentral.com, steve.dunk...@yahoo.com Date: Wednesday, February 27, 2013, 2:15 AM Garry and Steve, Most excellent posts and information; thank you. Further to my original question. Would/should we expect that there may be ground-to-air electro-stactic response (lightning) prior to the arrival of the physical body to physical contact with the earth; and has this been simulated or captured on video? Dirk Ross...Tokyo --- On Wed, 2/27/13, Garry Stewart xe...@yahoo.com wrote: From: Garry Stewart xe...@yahoo.com Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: drtanuki drtan...@yahoo.com Date: Wednesday, February 27, 2013, 4:33 PM Hi Dirk and List, This link http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.html explains the propagation of atomic shockwaves with interesting pictures of shockwave propagation. It can explain the effects on meteoric explosions at high altitude. Interesting read but very long article and detailed. - Original Message - From: drtanuki drtan...@yahoo.com To: meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 12:59 AM Subject: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Chelyabinsk on Ebay
Hello All, These auctions' photos show freshly fallen ordinary chondrites. All look good: http://www.ebay.com/sch/.a./m.html?item=300868095223rt=nc_trksid=p2047675.l2562 http://www.ebay.com/sch/ablipih/m.html?item=121072639061pt=LH_DefaultDomain_0hash=item1c307ddc55rt=nc_trksid=p2047675.l2562 http://www.ebay.com/sch/m.html?item=160979414962pt=LH_DefaultDomain_0_sacat=0_from=R40hash=item257b1eefb2_ssn=malkki2006_nkw=meteorite+chelyabinsk_nkwusc=meteorite+chelybinsk_rdc=1 http://www.ebay.com/sch/gogig/m.html?item=121073304718pt=LH_DefaultDomain_0hash=item1c3088048ert=nc_trksid=p2047675.l2562 http://www.ebay.com/sch/alexanches/m.html?item=251236221505pt=LH_DefaultDomain_0hash=item3a7ed88241rt=nc_trksid=p2047675.l2562 http://www.ebay.com/itm/Chelyabinsk-Russia-meteorite-fragments-/221194267252?pt=LH_DefaultDomain_0hash=item338034aa74 BUT, BE CAREFUL! Bassikounou or Chergach: http://www.ebay.com/itm/Chelyabinsk-RUSSIA-2013-Meteor-Event-19-00gr-Very-Rare-Meteorite-Specimen-/321081034359?pt=LH_DefaultDomain_0hash=item4ac1ebc677 [Generally, I'd stay way from all of this seller's auctions. Much misrepresented material, nothing anyone can do about it. Their smaller Chelyabinsk pieces look a little funky as well -- I'd assume Bensour or similar, but do not have any proof beyond appearance.] River rock: http://www.ebay.com/itm/02-15-13-Russia-Chelyabinsk-meteorite-fragment-6-g-Rare-Alien-Shaped-NR-/300868377874?pt=LH_DefaultDomain_0hash=item460d271d12 Road gravel (light rock with tar on exterior): http://www.ebay.com/itm/Chelyabinsk-meteorite-VERY-RARE-/251232951607?pt=UK_Collectables_RocksFossils_Minerals_EHhash=item3a7ea69d37 Sketchy auction showing a few photos of stones also pictured in a news release, with a photo of a cut...something that doesn't really look like a meteorite in the last photo: http://www.ebay.com/itm/Meteorite-from-Chelyabinsk-15-02-13-/230935960665?pt=LH_DefaultDomain_0hash=item35c4db1c59 If I wanted to buy one of the first pieces of this meteorite (why/why not?), I'd place a bid on something in the links above the 'be careful' note. I can't vouch for the sellers, but if you pay via paypal, you should be fine thanks to their pretty solid buyer protection. That said, we may be looking at a Gao-sized event, so ~$20/g might be a bit much. But, they're small, pristine, complete stones from a fall, so you probably won't do too badly. As you will. Regards, Jason On Wed, Feb 27, 2013 at 3:47 PM, Tom Randall tommy2...@hvc.rr.com wrote: I have bought a number of meteorites from the good folks on THIS meteorite list. eBay is fine, the BUYER has to know the seller. They need to do their homework or they run the risk of getting ripped off. It's no different than any other sale. KNOW YOUR SELLER folks, don't trust people you don't know. ASK AROUND. Ask people on this list. Ask ME. ASK! Point people to this meteorite list. If ANY of that Russian meteorite gets on the market you can bet I'll be buying it from someone on THIS list. If affordable of coarse! Regards! Tom __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: Stanfield (prov) Contributed by: Larry Atkins http://www.tucsonmeteorites.com/mpod.asp __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] CTBTO
http://www.space.com/19860-russia-meteor-explosion-largest-detected.html enjoy Steve __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties?
Ouch! Imagine the extra energy released if the detonation occured inside a thunderhead? I had a physics instructor who thought small amounts of nuclear reactions were caused by lightning as in nitrogen converted to ozone. He said keep your eyes open. Just because something is improbable it doesnt make it impossible. Some detonations happen when pressures get to high as stated by Chris Peterson but others happen when the forward pressure suddenly drops causing expasion or instability. most are the result of some kind of forward pressure change be it up or down. cheers Steve --- On Thu, 2/28/13, James Beauchamp falco...@sbcglobal.net wrote: From: James Beauchamp falco...@sbcglobal.net Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: Garry Stewart xe...@yahoo.com, meteorite-list@meteoritecentral.com, steve.dunk...@yahoo.com, drtanuki drtan...@yahoo.com Date: Thursday, February 28, 2013, 4:52 AM Hi Dirk, A very small amount of equivalent energy is involved with free electron release. Perhaps the moving electrons cause localized magnetic fields, but far lower than those needed to have large-scale charge separation. I can see the electron clouds on the radar because free electrons are conductive. But energy exchange is kept pretty locally. Now, posing in intriguing situation - lets say a russian-like event occurs over a supercell thunderstorm. It could skim across the anvil. The line of conducting plasma would short circuit the heavily charge separated areas (Charges migrate due to the supercooled freezing process). I think you would get a nice lightshow. Kind of interesting... CC meteortites, low pressure. Volatile amino acids, carbon, and lightning, Would be a nice situation for early life forms. --- On Wed, 2/27/13, drtanuki drtan...@yahoo.com wrote: From: drtanuki drtan...@yahoo.com Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: Garry Stewart xe...@yahoo.com, meteorite-list@meteoritecentral.com, steve.dunk...@yahoo.com Date: Wednesday, February 27, 2013, 2:15 AM Garry and Steve, Most excellent posts and information; thank you. Further to my original question. Would/should we expect that there may be ground-to-air electro-stactic response (lightning) prior to the arrival of the physical body to physical contact with the earth; and has this been simulated or captured on video? Dirk Ross...Tokyo --- On Wed, 2/27/13, Garry Stewart xe...@yahoo.com wrote: From: Garry Stewart xe...@yahoo.com Subject: Re: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? To: drtanuki drtan...@yahoo.com Date: Wednesday, February 27, 2013, 4:33 PM Hi Dirk and List, This link http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.html explains the propagation of atomic shockwaves with interesting pictures of shockwave propagation. It can explain the effects on meteoric explosions at high altitude. Interesting read but very long article and detailed. - Original Message - From: drtanuki drtan...@yahoo.com To: meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, February 27, 2013 12:59 AM Subject: [meteorite-list] Meteoroid/Asteroid Electro-Magnetic Disruption and Charge Properties? Dear List, If there is anyone willing to discuss the how and why meteoroids/asteroids detonate please explain for the list and myself. I am interested learning more about the electrical/mechanical/physical forces that these bodies undergo as they reach the earth such as in the latest Russian event. Thank you. Dirk Ross...Tokyo __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Russian crater source of diamonds.
http://www.delivermediamonds.com/will-russian-astroid-diamond-source-ruin-the-market/ cheers Steve __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
