[meteorite-list] Rocks from Space Picture of the Day - February 26, 2008
http://www.rocksfromspace.org/Febrruary_26_2008.html __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD: Auctions Ending and 25% off everything in my ebay store, SEE Highlights!
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[meteorite-list] AD Bassikounou and El Hammami
Hello everyone, I have got Bassikounou for sale from my private collection: Beautiful 2059g specimen split in two during impact (amazing impact marks!). http://picasaweb.google.com/illaenus/Bassikounou2059Grams and El Hammami 1060 g, specimen have great black fusion crust (about 50% of fusion crust) and fresh interior with visible chondrules also have nice iron veins visible on fusion crust surface. http://picasaweb.google.com/illaenus/ElHammami1060Grams If you are interest please write to [EMAIL PROTECTED] . I can send more photos on private mail. Kind Regards Tomasz Jakubowski IMCA #2321 Seksowne tancerki i zakochani młodzi mężczyźni, oraz gangsterzy trzymający twardą ręką show biznes. Zobacz to na żywo: http://klik.wp.pl/?adr=http%3A%2F%2Fcorto.www.wp.pl%2Fas%2FLewe-interesy.htmlsid=236 __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD: Auctions Ending and 25% off everything in my ebay store, SEE Highlights!
From: michael cottingham [mailto:[EMAIL PROTECTED] Sent: Monday, February 25, 2008 8:52 PM To: 'michael cottingham' Subject: AD: Auctions Ending and 25% off everything in my ebay store, SEE Highlights! Hello Everyone, Busy, busy, busy 25% off of everything in my ebay store and auctions ending! Check out the highlights! Of course this link will be too long, but if you cut and paste! After 10 years you would think I could figure it out! http://search.ebay.com/_W0QQfbfmtZ1QQfrppZ50QQfsooZ1QQfsopZ1QQrdZ0QQsabfmtsZ 1QQsascsZ1QQsassZmeteoriteQ2dcollector or this auction link: http://stores.ebay.com/VOYAGE-BOTANICA-NATURAL-HISTORY_W0QQcolZ4QQdirZ1QQfti dZ2QQsclZ2QQtZkm or my entire store link, to see 25% OFF ITEMS. http://stores.ebay.com/Voyage-Botanica-Natural-History HIGHLIGHTS: I am down to my very last Lahoma, Ok., slices, nice material! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201315418 A very beautiful Howardite slice, 12+ gram. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201316319 Bonita Springs, Florida. Rare. When these are gone you probably wont see any for a decade! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201315951 A nice specimen of NWA 2920, LL3.5, 23.93 gram! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201316327 A superb slice of NWA 3118, CV3, Large 16+ gram! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201316998 This Texas Iron has a total known weight of ONLY 500 grams! I would say very rare! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201318393 Albion, Washington, Rare Iron! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201318104 Diep River Hammer Stone. Super Rare, Super Buy it now price! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200202819010 You will not find this for sale anywhere else! Check and See! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200202819009 Cali Columbia, one of my last specimens for sale! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201533398 My NEW Meteorite from New Mexico! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201320696 Hamlet, Indiana, Another Rare Hammer stone! Rare witnessed fall. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201318748 Rare Achondrite and one of my last specimens! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201314330 Cow killer, VALERA, nice part slice! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201314898 A nice Diogenite specimen! Still at 0.99 cents! This is an $80.00 specimen! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201317207 And a whole lot more! Thanks and Best Wishes Michael Cottingham __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Carancas in the news
Messages aren't going through the list, so I'm sending this to you directly. http://cosmiclog.msnbc.msn.com/archive/2008/02/25/701427.aspx Meteorites spark mysteries Posted: Monday, February 25, 2008 8:20 PM by Alan Boyle Five months after a meteorite made an international splash in Peru, experts are suggesting explanations for some of the space rock's effects - for example, the sickening odor villagers smelled at the crash site, and the bubbles that were seen emanating from the water-filled crater left behind. But a study due to be presented next month also raises fundamental questions about the event. In fact, an international research team declares that the impact should not have happened at all. Yet another study sets forth a mystery surrounding two other meteorites found in Antarctica a couple of years ago. The rocks don't match any other class of meteorite - so where did they come from? The two studies are among hundreds submitted for the annual Lunar and Planetary Science Conference, scheduled March 10-14 in League City, Texas. The conference offers the cream of the crop in planetary science - focusing on topics ranging from the solar wind, to Mercury and Mars, to the icy dwarfs on the solar system's edge. The Peruvian meteorite impact comes in for a fresh round of scientific scrutiny in a study submitted by researchers from Brown University and institutes in Peru and Uruguay. Just after the impact was reported, some scientists doubted whether a meteorite was actually responsible for the crater - but subsequent analysis proved that a stony space rock was involved (as opposed to a denser iron meteorite). Scientists previously thought that stony meteorites on the scale of the one that hit Peru would break apart into little pieces before they hit the ground. The fact that this one survived to create a 40-foot-wide crater threw the researchers what they called a hypervelocity curveball. They said the standard model used to estimate the effects of stony meteorites will need to be revised as a result. The study does propose two possible explanations for the reports of boiling water seen within the crater: The bubbles could have come from the compressed air that surrounded the meteorite as it blasted into the wet earth - or it could have been caused by clumps of clay that dissolved and frothed as they fell into the crater. These two processes may have been responsible for local reports of water bubbling up from the floor soon after impact, the researchers wrote. While there would have been heat generated at impact, it is unlikely that this could have sustained bubbling an hour later. Meteorite hunter Michael Farmer, who visited the site last year soon after the impact, has said the sickening odor that villagers said emanated from the crater was most likely caused by sulfurous compounds such as triolite interacting with the ground water - and there's nothing in the latest study that contradicts that suggestion. The Peruvian meteorite may be in for another shot at fame: Just last week, Living in Peru reported that Japanese investors are interested in building a space museum near the impact site, and that National Geographic is planning a documentary about the meteorite. Now to the other space-rock study: Meteorite hunters from the Lunar and Planetary Institute and NASA's Johnson Space Center reported finding a pair of specimens in 2006 in Antarctica's Graves Nunataks area. These meteorites are not obviously like any other meteorites, so their origin is unclear, the Lunar and Planetary Institute said in its media advisory. The mineralogy and chemical composition of these meteorites are so unusual that scientists have been struggling to find the right term to describe them. Numerous parent bodies have been proposed. Could they have come from the moon? From Venus? Scientists are currently debating these issues. The researchers behind the study say they're not finished with their analysis of the rocks, and more findings may emerge at next month's conference. So stay tuned as the meteorite tales and other mysteries are fully brought to light. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Test delete
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[meteorite-list] [AD] Ozona 128 grams.
G'day fellow Rockabillies, Last week I posted a few not everydays meteorites. All are gone (thanks lads !!) but one left Ozona. Chondrite H6. 128 grams fragment Found: 1929 Crockett Co. Texas. A purchase from Al Lang back in the early 90's.(Comes with his specimen card) Link to picture: http://pic70.picturetrail.com/VOL1850/8117688/19076437/304713632.jpg Make me an offer off list pls. Greets, Jan Bartels. Heavenly Bodies Meteorites. Holland IMCA 9833 www.heavenlybodies.nl __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite Prices 2000/2001
Hiho, I just tried - like so often - to enlighten the newer collectors in the German forum in what for favourable times they're living and listed them some prices of the year 2000/2001. Maybe they are also of interest for you. The prices stem from a compilation, I made 2001. They contain all prices I could get from dealers, dealer-collectors, collectors (all in all 72 persons/places) from internet or by real mail. Prices given here are averaged from all offers for the respective meteorite. Those sorted by classes, are all of that type, which I had found offered. To balance the inflation, multiply the given prices by the factor 1.2 Let's go: Brenham8.48$/g Brahin 6.86$/g Imilac 10.10$/g (including fragments). Pallasovka not available Seymchannot available Campo del Cielo 0.61$/g Canyon Diablo1.10$/g Mounionalusta26$/g Morasko 2.81$/g Ureilites DaG 084 103.5$/g DaG 319 111.83$/g DaG 340 95.46$/g DaG 485 142.30$/g DaG 801 160$/g Goalpara 590.60$/g SAH 98501257$/g SAH 98505174.4$/g SAH 99201200$/g Howardites: Chaves 511$/g DaG 443 129.2$/g DaG 773 238.3$/g GSS010 624.4$/g Kapoeta 778.8$/g Dho 018 175$/g Luotolax 600$/g SAH 99314250$/g R-Chondrites DaG 013 on request HaH 119 on request Ouzina 389.2$/g SAH 98248 675$/g SAH 99527 600$/g SAH 99531 600$/g SAH 99537 704.5$/g Acapulcoites: Acapulco 1100$/g Monument Draw 793.9$/g Mars: Shergottites: Dag 476 1353.7$/g DaG 489792.4$/g DaG 670558.3$/g DaG 735550$/g Dho 0192000$ for micros, 400$/g for 100g. LA 001 5600$/g for micros - 2500$/g for 20g+ SaU 005 727$/g Shergotty 5000$/g Zagami 1424.6$/g Nakhlites: Lafayette 35,129$/g Nakhla 2854$/g Moon: Calalong Creek Micros 0.002g - 0.582g 350,000-77,500$/g DaG 262 38,594$/g DaG 400 19,074$/g CKs: DaG 250 on request DaG 275120$/g Dag 430163.33$/g DaG 431250$/g Maralinga 131$/g Unequilibrated - 3ers: Barratta L325.25$/g Begaa LL3 37.55$/g Bremervörde H/L3.9 Micros 200$ each Brownfield (1937) H3 14.67$/g Clovis N°1 H3 23.33$/g DaG 054 LL3 45$/g DaG 315 H3-5 7$/g DaG 318 H37$/g DaG 353 H3-5 3$/g DaG 369 L(H)3 22$/g DaG 632 LL3.2-3.4 100$/g DaG 736 L3 6.5$/g DaG 785 LL3 20$/g Felt(b) L3.5 15$/g HaH 160 H3-5 10.8$/g HaH 260 L32.95$/g Julesburg L3.6 12.31$/g NWA 028 H3.7 10$/g Dho 024 H3.9 1.75$/g Dho 189 H3.8 5$/g Mezö-Madaras L3.7 74.3$/g Parnallee LL355.74$/g Richfield LL3.7 25.77$/g Rio Limay L3/5 on request SAH97193 L3.937.5$/g SAH97211 LL3-6 13.62$/g SAH98044 LL/L3 50$/g SAH98175 LL3.5 35$/g SAH99159 LL3 34.4$/g SAH99228 H3.810$/g Sarir Quattusah 001 LL(L3) 80$/g Tag 019 LL3.7 10.8$/g Tag 077 H3.815$/g Tulia(a) H3-53.14$/g Zag H3-6 3.1$/g Zegdou H33.17$/g 1st NWAs: NWA 002 EL6, S5, W4 15$/g NWA 003 H4, S3, W2 1.5$/g NWA 005 H4, S3, W3 1.5$/g NWA 006 H5, S4, W4 1.5$/g and so on... Cheers! Martin __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Meteorite Prices 2000/2001
Ha More meteorites-price-trends (sorry - polish language ;-( http://www.woreczko.pl/meteorites/sale/Price_trends.htm Best Woreczko www.woreczko.pl - Original Message - From: Martin Altmann [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Tuesday, February 26, 2008 6:29 PM Subject: [meteorite-list] Meteorite Prices 2000/2001 Hiho, I just tried - like so often - to enlighten the newer collectors in the German forum in what for favourable times they're living and listed them some prices of the year 2000/2001. Maybe they are also of interest for you. The prices stem from a compilation, I made 2001. They contain all prices I could get from dealers, dealer-collectors, collectors (all in all 72 persons/places) from internet or by real mail. Prices given here are averaged from all offers for the respective meteorite. Those sorted by classes, are all of that type, which I had found offered. To balance the inflation, multiply the given prices by the factor 1.2 Let's go: Brenham8.48$/g Brahin 6.86$/g Imilac 10.10$/g (including fragments). Pallasovka not available Seymchannot available Campo del Cielo 0.61$/g Canyon Diablo1.10$/g Mounionalusta26$/g Morasko 2.81$/g Ureilites DaG 084 103.5$/g DaG 319 111.83$/g DaG 340 95.46$/g DaG 485 142.30$/g DaG 801 160$/g Goalpara 590.60$/g SAH 98501257$/g SAH 98505174.4$/g SAH 99201200$/g Howardites: Chaves 511$/g DaG 443 129.2$/g DaG 773 238.3$/g GSS010 624.4$/g Kapoeta 778.8$/g Dho 018 175$/g Luotolax 600$/g SAH 99314250$/g R-Chondrites DaG 013 on request HaH 119 on request Ouzina 389.2$/g SAH 98248 675$/g SAH 99527 600$/g SAH 99531 600$/g SAH 99537 704.5$/g Acapulcoites: Acapulco 1100$/g Monument Draw 793.9$/g Mars: Shergottites: Dag 476 1353.7$/g DaG 489792.4$/g DaG 670558.3$/g DaG 735550$/g Dho 0192000$ for micros, 400$/g for 100g. LA 001 5600$/g for micros - 2500$/g for 20g+ SaU 005 727$/g Shergotty 5000$/g Zagami 1424.6$/g Nakhlites: Lafayette 35,129$/g Nakhla 2854$/g Moon: Calalong Creek Micros 0.002g - 0.582g 350,000-77,500$/g DaG 262 38,594$/g DaG 400 19,074$/g CKs: DaG 250 on request DaG 275120$/g Dag 430163.33$/g DaG 431250$/g Maralinga 131$/g Unequilibrated - 3ers: Barratta L325.25$/g Begaa LL3 37.55$/g Bremervörde H/L3.9 Micros 200$ each Brownfield (1937) H3 14.67$/g Clovis N°1 H3 23.33$/g DaG 054 LL3 45$/g DaG 315 H3-5 7$/g DaG 318 H37$/g DaG 353 H3-5 3$/g DaG 369 L(H)3 22$/g DaG 632 LL3.2-3.4 100$/g DaG 736 L3 6.5$/g DaG 785 LL3 20$/g Felt(b) L3.5 15$/g HaH 160 H3-5 10.8$/g HaH 260 L32.95$/g Julesburg L3.6 12.31$/g NWA 028 H3.7 10$/g Dho 024 H3.9 1.75$/g Dho 189 H3.8 5$/g Mezö-Madaras L3.7 74.3$/g Parnallee LL355.74$/g Richfield LL3.7 25.77$/g Rio Limay L3/5 on request SAH97193 L3.937.5$/g SAH97211 LL3-6 13.62$/g SAH98044 LL/L3 50$/g SAH98175 LL3.5 35$/g SAH99159 LL3 34.4$/g SAH99228 H3.810$/g Sarir Quattusah 001 LL(L3) 80$/g Tag 019 LL3.7 10.8$/g Tag 077 H3.815$/g Tulia(a) H3-53.14$/g Zag H3-6 3.1$/g Zegdou H33.17$/g 1st NWAs: NWA 002 EL6, S5, W4 15$/g NWA 003 H4, S3, W2 1.5$/g NWA 005 H4, S3, W3 1.5$/g NWA 006 H5, S4, W4 1.5$/g and so on... Cheers! Martin __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list This email was Anti Virus checked by Astaro Security Gateway. __ NOD32 2903 (20080226) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] piece or slice of Allende
Hi list, someone of you have a slice or end cut of Allende ? I need only a little piece for show at students. I'm a paypal user for payment. Many thanks Paolo __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] February Meteorite-Times Now Up
Hello Everyone, The February Meteorite-Times is now up. http://www.meteorite-times.com/ The March issue will be up around the middle of March. Thank you! Paul and Jim __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] February Meteorite-Times Now Up
The February Meteorite-Times is now up. http://www.meteorite-times.com/ Just back from watching Ruben's Hunting Grounds. Thank you, Ruben. This was the next best thing to actually being there! Thanks also to Arizona Keith for all those Tucson Show pictures! Bernd __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD: MORE THAN A HUNDRED 99 CENT EBAY AUCTIONS PLUS MALI
I have more than 100 NWAs ending on ebay now all at 99 cents. Plus hundreds of buy it now store items just waiting for you See me ebay user id AMUNRE or click here: http://stores.ebay.com/DEANS-COLLECTIBLES-AND-GEMSTONES_Meteorites_W0QQcolZ4QQdirZ1QQfsubZ4QQftidZ2QQtZkm I also have some more Mali http://www.meteoriteshop.com/metsale/mali1.jpg http://www.meteoriteshop.com/metsale/mali2.jpg Weights are noted in red and are $2 a gram plus shipping. Sincerely DEAN BESSEY Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] MeteoriteWatch.com Weekly Meteorite Giveaway!
Hi all, Sorry if this is a double post. I posted it yesterday but it didn't post I guess... ORIGINAL POST--- MeteoriteWatch.com Weekly Meteorite Giveaway! Thanks to all of you who have joined the MW newsletter. The Meteorite Giveaway is a great success, and other than a few people who complained about not getting the emails in time for auction endings and about not winning the giveaway meteorite it's been a wonderful promotion for all. So good in fact I've decided to make it a permanent feature of MW. This gives eveyone a chance a great meteorites to add to their collections with no out of pocket expense. Having said that I have an announcement to make! A private collector has generously donated a very nice 24.3gram Sikhote Alin meteorite for the MW Meteorite Giveaway. How cool is that? This is a great piece with nice regmaglypts, and it even includes a SA meteorite label from MeteoriteLabels.com Now that is awesome! To get a chance at this FANTASTIC meteorite you can become a member of the MW newsletter list: http://www.meteoritewatch.com/newsletter/ Every week I'll pick one lucky person from the list to receive the meteorite. This is a chance for everyone to receive a FREE meteorite just for joining the MW newsletter. It's a MEMBERS ONLY giveaway. If you're not a member already what are you waiting for? Click here for photos of this great piece: www.MeteoriteWatch.com I also have more than 2 Kilos Of Auctions Ending Tonight: http://search.ebay.com/_W0QQsassZfreel3orn Regards, Eric Wichman MeteoriteWatch.com Meteorites USA __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Some Meteorite Prices prior to 2000/2001
Martin wrote: Maralinga 131$/g I purchased my 2.8-gram slice from David New in 91/92 and had to pay $39 per gram. Barratta L3 25.25$/g 12 grams from David New ... purchased October 1987. Price: $4.16/g Julesburg L3.6 12.31$/g 43.5 grams purchased from Walter Zeitschel in 1987. Price: 8 DM*/g *One US dollar was about 1.80 German Marks (DM) at that time, so about $4.44 per gram. Parnallee LL3 55.74$/g 11.9 grams purchased from David New in March 1989 for $145. That is $12.18 per gram. Well, these examples may suffice to show that the prices rose steeply, sometimes even skyrocketed toward the turn of the century! Cheers, Bernd __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Some Meteorite Prices prior to 2000/2001
See my latest METEORITE MARKET TRENDS for recent surge in prices: http://www.michaelbloodmeteorites.com/MMT.html You can also get to it via the current issue of METEORITE TIMES. Best wishes, Michael on 2/26/08 1:05 PM, [EMAIL PROTECTED] at [EMAIL PROTECTED] wrote: Martin wrote: Maralinga 131$/g I purchased my 2.8-gram slice from David New in 91/92 and had to pay $39 per gram. Barratta L3 25.25$/g 12 grams from David New ... purchased October 1987. Price: $4.16/g Julesburg L3.6 12.31$/g 43.5 grams purchased from Walter Zeitschel in 1987. Price: 8 DM*/g *One US dollar was about 1.80 German Marks (DM) at that time, so about $4.44 per gram. Parnallee LL3 55.74$/g 11.9 grams purchased from David New in March 1989 for $145. That is $12.18 per gram. Well, these examples may suffice to show that the prices rose steeply, sometimes even skyrocketed toward the turn of the century! Cheers, Bernd __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] advice on polishing irons
I need help and advice on how to polish largish (up to 1 ft or so in diameter) pieces of iron meteorites. What equipment do I need etc. Please email me off this list at [EMAIL PROTECTED] . Thanks in advance. Laurence meteorites.asu.edu __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Cyclic meteorite streams?
Hi all - This seems a good a time as any to being this topic up once again, as the ISS is given a chance of somewhere between 1 in 20 to 1 in 100 of being holed by ordinary man made space junk. While many have taken a look at annual fall patterns, I have often wondered if some meteorite falls are not instead cyclic, in other words come from intercepting recurring debris streams from asteroids? Along those lines, why are meteor showers (comet debris stream intercepts) annual, and not cyclic on another basis? E.P. Grondine Man and Impact in the Americas Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD: Auctions Ending SOON and 25% off everything in my ebay store, MORE Highlights Added!
From: michael cottingham [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 26, 2008 3:35 PM To: 'michael cottingham' Subject: AD: Auctions Ending SOON and 25% off everything in my ebay store, MORE Highlights Added! Hello Everyone, *There appear to be some deals to be had tonight! Place a bid and walk away with a deal! Busy, busy, busy 25% off of everything in my ebay store and auctions ending! Check out the highlights! Of course this link will be too long, but if you cut and paste! After 10 years you would think I could figure it out! http://search.ebay.com/_W0QQfbfmtZ1QQfrppZ50QQfsooZ1QQfsopZ1QQrdZ0QQsabfmtsZ 1QQsascsZ1QQsassZmeteoriteQ2dcollector or this auction link: http://stores.ebay.com/VOYAGE-BOTANICA-NATURAL-HISTORY_W0QQcolZ4QQdirZ1QQfti dZ2QQsclZ2QQtZkm or my entire store link, to see 25% OFF ITEMS. http://stores.ebay.com/Voyage-Botanica-Natural-History HIGHLIGHTS: Tenham, Australia Fall..nice part slice, still at 0.99 cents! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201315192 Awesome specimen of a difficult to acquire meteorite! Sacramento Wash http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201320008 New, NWA 4972, Brecciated L4-5, A very large slice at 340 grams! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201323305 Lunar Impact Melt specimen! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201323310 New, NWA 5057, 22.76 gram. Only a few specimens available. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201321146 New, NWA 4953, LKW, L/LL6, 12.78g, nice specimen! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201320810 New, NWA 4971, 30.7 gram slice. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201320256 I am down to my very last Lahoma, Ok., slices, nice material! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201315418 A very cool LL5 Slice, 26.24 gram, NWA 2380, still pretty cheap! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201318051 A very beautiful Howardite slice, 12+ gram. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201316319 Bonita Springs, Florida. Rare. When these are gone you probably wont see any for a decade! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201315951 A nice specimen of NWA 2920, LL3.5, 23.93 gram! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201316327 A superb slice of NWA 3118, CV3, Large 16+ gram! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201316998 This Texas Iron has a total known weight of ONLY 500 grams! I would say very rare! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201318393 Albion, Washington, Rare Iron! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201318104 Diep River Hammer Stone. Super Rare, Super Buy it now price! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200202819010 You will not find this for sale anywhere else! Check and See! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200202819009 Cali Columbia, one of my last specimens for sale! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201533398 My NEW Meteorite from New Mexico! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201320696 Hamlet, Indiana, Another Rare Hammer stone! Rare witnessed fall. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201318748 Rare Achondrite and one of my last specimens! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201314330 Cow killer, VALERA, nice part slice! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201314898 A nice Diogenite specimen! Still at 0.99 cents! This is an $80.00 specimen! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200201317207 And a whole lot more! Thanks and Best Wishes Michael Cottingham __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Carancas in the news
Hi, All, The papers on Carancas referred to are this one... http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1216.pdf ...and this one: http://www.lpi.usra.edu/meetings/lpsc2008/pdf/2446.pdf The first paper suggests, by an analysis of witness reports from the surrounding area, an azimuth of 82° and an altitude of 63° for the incoming trajectory, with an impact velocity of 3000 m/sec. Orbital calculations based on this track suggest a body of low inclination (5° ) but in an orbit very different from known near-Earth asteroids. An unique, or at least odd, object, with an unique, or at least odd, orbit. It came from somewhere else, folks... Its strange appearance and texture show a very heavily shocked history. The second paper, which studies the impact effects on the materials of the locality, suggests that many of the shock features mean a greater impact velocity, perhaps 4000 m/sec or more. Their analysis of the stratigraphy of the crater suggests that the bolide reached the ground in one piece and penetrated intact to the depth of about 1/3rd of a meter before exploding. Large overturned blocks of ejecta are riddled (their word) with meteoritic fragments ON THE UNDERSIDE. Both papers are short and sweet (2 pages) and they are worth the read. We've been having this discussion on the List about the List, and the Carancas story is a perfect example of the virtues of the List and what it can do in its informal way. The suggestion that the boiling and odors of the crater were due the thermal dissociation of troilite (which is abundant in the meteorite) was first made here on the List (and first made anywhere) by member Piper R. W. Hollier. From that, others were able to calculate that the impact velocity had to be in excess of 1611 m/sec, probably at least twice that, to vaporize the troilite -- a figure that matches that calculated in the first paper cited above. There were arguments presented for a high altitude angle for the impact (later determined to be 63°) and for an orbit like that suggested in that first paper. In fact, a good deal of this information about Carancas presented in these papers could be found, in somewhat more speculative form, on the lengthy and voluminous List discussion of Carancas in the first weeks after the event. There was nothing else like this List discussion of Carancas going on anywhere else and no other place where information could be found, sifted, and analyzed, or witness reports could be found. There was even a good explanation of how the bolide managed to get to the ground in defiance of the models which all say, no way. All I'm saying here is: Hooray for the List. There's nothing else like it. Sterling K. Webb - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Tuesday, February 26, 2008 10:24 AM Subject: [meteorite-list] Carancas in the news http://cosmiclog.msnbc.msn.com/archive/2008/02/25/701427.aspx Meteorites spark mysteries Posted: Monday, February 25, 2008 8:20 PM by Alan Boyle Five months after a meteorite made an international splash in Peru, experts are suggesting explanations for some of the space rock's effects - for example, the sickening odor villagers smelled at the crash site, and the bubbles that were seen emanating from the water-filled crater left behind. But a study due to be presented next month also raises fundamental questions about the event. In fact, an international research team declares that the impact should not have happened at all. Yet another study sets forth a mystery surrounding two other meteorites found in Antarctica a couple of years ago. The rocks don't match any other class of meteorite - so where did they come from? The two studies are among hundreds submitted for the annual Lunar and Planetary Science Conference, scheduled March 10-14 in League City, Texas. The conference offers the cream of the crop in planetary science - focusing on topics ranging from the solar wind, to Mercury and Mars, to the icy dwarfs on the solar system's edge. The Peruvian meteorite impact comes in for a fresh round of scientific scrutiny in a study submitted by researchers from Brown University and institutes in Peru and Uruguay. Just after the impact was reported, some scientists doubted whether a meteorite was actually responsible for the crater - but subsequent analysis proved that a stony space rock was involved (as opposed to a denser iron meteorite). Scientists previously thought that stony meteorites on the scale of the one that hit Peru would break apart into little pieces before they hit the ground. The fact that this one survived to create a 40-foot-wide crater threw the researchers what they called a hypervelocity curveball. They said the standard model used to estimate the effects of stony meteorites will need to be
Re: [meteorite-list] Cyclic meteorite streams?
Hi, E. P. Grondine wrote: Along those lines, why are meteor showers (comet debris stream intercepts) annual, and not cyclic on another basis? A small fraction of comets have orbits that intersect the Earth's orbit at some specific spot. Debris from a comet tend to eventually get spread out all along the comet's orbit The density of the debris is thick or thin depending on how long it's been riding along in the general envelope of the cometary orbit. A location, a specific spot, on the Earth's orbit is actually a date, a time disguised as a place. Our calendar is walk around the circumference of the Earth's orbit in 24-hour steps. Pick any date -- August 11 -- and you have pinned down a roughly one-degree patch at a particular location on the Earth's orbit, like an address on a circular street. If that location is where a comet's orbit intersects the Earth's orbit there may (or may not) be debris going through the volume of the intersection at the same time the Earth is. If the debris stream is reasonably dense in that location year after year, we call it a meteor shower. There have long been suspicions and suggestions of what you're talking about: asteroidal streams, particularly associated with near-Earth asteroids. For a history of the evidence, scroll down to page four of this paper: http://www.lpi.usra.edu/books/AsteroidsIII/pdf/3017.pdf Sterling K. Webb - Original Message - From: E.P. Grondine [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Tuesday, February 26, 2008 4:25 PM Subject: [meteorite-list] Cyclic meteorite streams? Hi all - This seems a good a time as any to being this topic up once again, as the ISS is given a chance of somewhere between 1 in 20 to 1 in 100 of being holed by ordinary man made space junk. While many have taken a look at annual fall patterns, I have often wondered if some meteorite falls are not instead cyclic, in other words come from intercepting recurring debris streams from asteroids? Along those lines, why are meteor showers (comet debris stream intercepts) annual, and not cyclic on another basis? E.P. Grondine Man and Impact in the Americas Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Bad News
Hello again, The phone call came this morning. My father passed away during the night (Denver time). It was not unexpected since he had not recovered consciousness since his stroke 2 weeks ago. And it was the best solution for him. My father was a very active person to the end (he was driving his BMW 5 days before the stroke) and he would have been horrified and furious to find himself on oxygen and IV if he had regained consciousness. I am glad I went to France and saw him one last time. Now my brother is handling everything and I won't be going back to France, at least not until June. Thank you everybody for all your emails or sympathy and encouragement. I really appreciate. And now back to work! The best remedy for me. Anne M. Black www.IMPACTIKA.com [EMAIL PROTECTED] Vice-President, I.M.C.A. Inc. www.IMCA.cc **Ideas to please picky eaters. Watch video on AOL Living. (http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/ 2050827?NCID=aolcmp0030002598) __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Bad News
Dear Anne: I'm sure all List members will want to join me in expressing our condolences for your loss. I am glad you made the decision to return to France during the gem show to see your father. We only get one dad, but there are plenty of gem shows in your future. Your father had a long and active life, and I'm sure he was very proud of your many accomplishments. Now might be a good time to say thanks to you, personally, for all you do with the IMCA to help make the meteorite community a better place. It was a privilege to share a showroom with you during Tucson '08. Respectfully, Geoff N. www.aerolite.org www.campometeorites.com __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Carancas in the news
I certainly agree with you Mr Webb. That willingness to share by people in the know such as yourself, and Mr. Matson, and Mr. Lebofsky, and quite a few others with the wealth of knowledge, training and expertise on meteor/meteorite and so many other related sciences, is definitely a big plus for the Met-List. My hat is off to all of you. And thank you. Mike in CO On Feb 26, 2008, at 3:47 PM, Sterling K. Webb wrote: Hi, All, The papers on Carancas referred to are this one... http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1216.pdf ...and this one: http://www.lpi.usra.edu/meetings/lpsc2008/pdf/2446.pdf The first paper suggests, by an analysis of witness reports from the surrounding area, an azimuth of 82° and an altitude of 63° for the incoming trajectory, with an impact velocity of 3000 m/sec. Orbital calculations based on this track suggest a body of low inclination (5° ) but in an orbit very different from known near-Earth asteroids. An unique, or at least odd, object, with an unique, or at least odd, orbit. It came from somewhere else, folks... Its strange appearance and texture show a very heavily shocked history. The second paper, which studies the impact effects on the materials of the locality, suggests that many of the shock features mean a greater impact velocity, perhaps 4000 m/sec or more. Their analysis of the stratigraphy of the crater suggests that the bolide reached the ground in one piece and penetrated intact to the depth of about 1/3rd of a meter before exploding. Large overturned blocks of ejecta are riddled (their word) with meteoritic fragments ON THE UNDERSIDE. Both papers are short and sweet (2 pages) and they are worth the read. We've been having this discussion on the List about the List, and the Carancas story is a perfect example of the virtues of the List and what it can do in its informal way. The suggestion that the boiling and odors of the crater were due the thermal dissociation of troilite (which is abundant in the meteorite) was first made here on the List (and first made anywhere) by member Piper R. W. Hollier. From that, others were able to calculate that the impact velocity had to be in excess of 1611 m/sec, probably at least twice that, to vaporize the troilite -- a figure that matches that calculated in the first paper cited above. There were arguments presented for a high altitude angle for the impact (later determined to be 63°) and for an orbit like that suggested in that first paper. In fact, a good deal of this information about Carancas presented in these papers could be found, in somewhat more speculative form, on the lengthy and voluminous List discussion of Carancas in the first weeks after the event. There was nothing else like this List discussion of Carancas going on anywhere else and no other place where information could be found, sifted, and analyzed, or witness reports could be found. There was even a good explanation of how the bolide managed to get to the ground in defiance of the models which all say, no way. All I'm saying here is: Hooray for the List. There's nothing else like it. Sterling K. Webb -- -- - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Tuesday, February 26, 2008 10:24 AM Subject: [meteorite-list] Carancas in the news http://cosmiclog.msnbc.msn.com/archive/2008/02/25/701427.aspx Meteorites spark mysteries Posted: Monday, February 25, 2008 8:20 PM by Alan Boyle Five months after a meteorite made an international splash in Peru, experts are suggesting explanations for some of the space rock's effects - for example, the sickening odor villagers smelled at the crash site, and the bubbles that were seen emanating from the water-filled crater left behind. But a study due to be presented next month also raises fundamental questions about the event. In fact, an international research team declares that the impact should not have happened at all. Yet another study sets forth a mystery surrounding two other meteorites found in Antarctica a couple of years ago. The rocks don't match any other class of meteorite - so where did they come from? The two studies are among hundreds submitted for the annual Lunar and Planetary Science Conference, scheduled March 10-14 in League City, Texas. The conference offers the cream of the crop in planetary science - focusing on topics ranging from the solar wind, to Mercury and Mars, to the icy dwarfs on the solar system's edge. The Peruvian meteorite impact comes in for a fresh round of scientific scrutiny in a study submitted by researchers from Brown University and institutes in Peru and Uruguay. Just after the impact was reported, some scientists doubted whether a meteorite was actually responsible for the crater - but subsequent analysis proved
Re: [meteorite-list] Some Meteorite Prices prior to 2000/2001
Hi Bernd, indeed it seems that the 90ies were the decade, when meteorites woke up from their Big Sleep and stepped out from their splendid isolation they were kept in from a very few meteoriticist on the globe. Maybe because of the developments regarding internet, not to forget such great propagandists like a Haag. Of course there were also locales in the 90ies to be had much cheaper than today and not all were so mythical affordable in the 80ies (Bernd look on your Zeitschel-Labels - paid for my small Mundrabillas and Odessa more than today, was the same time, when you started). But the main difference was that the collectors had a poor choice, compared to the glut of especially the rare types today. To accomplish a systematic type-collection then was a quite impossible venture. And especially in the 90ies one would have had to sell wife children, if such a collection shouldn't consists of specks and crumbs only. Btw. I'm not so old, but the 60ies and 70ies seemed to be quite a slump for meteorites, especially if one looks at the price compilations of Cohen from the late 19th century, where the prices don't differ from the non-desert level of today. My concern is, that the newer collectors recognize, that they are just living in the very years, where all types are without larger efforts accessible, even the (still) most and really exceedingly rare stuff and that they are still priced, that it is possibleaffordable for almost everyone to assemble a really meaningful, significant and relatively complete collection of all types and classes. That they are collecting now in a time, which (maybe in a shorter time than it should) once could be referred as a kind of Golden Age. Has anyone prices from the 20ies to 60ies to share? Best! Martin -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von [EMAIL PROTECTED] Gesendet: Dienstag, 26. Februar 2008 22:06 An: Meteorite-list@meteoritecentral.com Betreff: [meteorite-list] Some Meteorite Prices prior to 2000/2001 Martin wrote: Maralinga 131$/g I purchased my 2.8-gram slice from David New in 91/92 and had to pay $39 per gram. Barratta L3 25.25$/g 12 grams from David New ... purchased October 1987. Price: $4.16/g Julesburg L3.6 12.31$/g 43.5 grams purchased from Walter Zeitschel in 1987. Price: 8 DM*/g *One US dollar was about 1.80 German Marks (DM) at that time, so about $4.44 per gram. Parnallee LL3 55.74$/g 11.9 grams purchased from David New in March 1989 for $145. That is $12.18 per gram. Well, these examples may suffice to show that the prices rose steeply, sometimes even skyrocketed toward the turn of the century! Cheers, Bernd __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Life Forms Ejected on Asteroid Impact Could Survive to Reseed Earth According to Study
http://www.liebertpub.com/prdetails.aspx?pr_id=618 Mary Ann Liebert, Inc. For Immediate Release Contact Vicki Cohn, (914) 740-2156, [EMAIL PROTECTED] Life Forms Ejected on Asteroid Impact Could Survive to Reseed Earth According to a Study Published in Astrobiology New Rochelle, February 26, 2008 - In the event that an asteroid or comet would impact Earth and send rock fragments containing embedded microorganisms into space, at least some of those organisms might survive and reseed on Earth or another planetary surface able to support life, according to a study published in the Spring 2008 (Volume 8, Number 1) issue of Astrobiology http://www.liebertonline.com/toc/ast/8/1, a peer-reviewed journal published by Mary Ann Liebert, Inc http://www.liebertpub.com/. The paper is available free online http://www.liebertonline.com/doi/pdfplus/10.1089/ast.2007.0134. In the report entitled, Microbial Rock Inhabitants Survive Hypervelocity Impacts on Mars-like Host Planets: First Phase of Lithopanspermia Experimentally Tested, http://www.liebertonline.com/doi/pdfplus/10.1089/ast.2007.0134 Gerda Horneck and colleagues describe systematic shock recovery experiments designed to simulate a scenario called lithopanspermia, in which microorganisms are transported between planets via meteorites. The first step of lithopanspermia would involve ejection of the microorganism-containing rock from the host planet as a result of an impact event. The researchers sandwiched dry layers of three kinds of biological test systems, including bacterial endospores, endolithic cyanobacteria, and epilithic lichens, between gabbro discs, which are analogous to martian rocks. They then simulated the shock pressures martian meteorites experienced when they were ejected from Mars and determined the ability of the organisms to survive the harsh conditions. The organisms selected represent potential 'hitchhikers' within impact-ejected rocks, explain the authors, and are hardy examples of microbes that can withstand extreme environmental stress conditions, write the authors. The results support the potential for rocks ejected on asteroidal impact to carry microorganisms capable of reseeding the Earth, according to Horneck and coworkers, from the Institute of Aerospace Medicine (Kon, Germany), Humboldt University of Berlin, Heinrich-Heine University (Dusseldorf, Germany), Ernst-Mach Institute for Short-Term Dynamics (Freiberg, Germany), Open University (Milton Keynes, U.K.), the German Collection of Microorganism and Cell Cultures (Braunschweig, Germany), the Russian Academy of Science (Moscow), and the Planetary Science Institute (Tucson, AZ). Given that impacts have occurred on planetary bodies throughout the history of our solar system, says journal Editor, Sherry L. Cady, PhD, Associate Professor in the Department of Geology at Portland State University, the hypothesis that life in rock could have been transferred between planets at different times during the past 3.5 billion years is plausible. These experiments advance our understanding of the constraints on life's ability to survive the magnitude of impact that would accompany a meteoric trip from Mars to Earth. Astrobiology is an authoritative peer-reviewed journal published bimonthly in print and online. The journal provides a forum for scientists seeking to advance our understanding of lifeâs origins, evolution, distribution and destiny in the universe. A complete table of contents and a full text for this issue may be viewed online http://www.liebertonline.com/toc/ast/8/1. Astrobiology is the leading peer-reviewed journal in its field. To promote this developing field, the Journal has teamed up with The Astrobiology Web to highlight one outstanding paper per issue of Astrobiology. This paper is available free online and to visitors of The Astrobiology Web http://www.astrobiology.com/. __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Ad: 23 Lb Canyon Diablo Meteorite with Hole for sale.
Hi all, Anyone seriously interested in purchasing this beautiful specimen should contact me directly for price. http://www.mr-meteorite.com/23lbcanyondiablo.htm Ruben Garcia Phoenix, Arizona http://www.mr-meteorite.com Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Fwd: RE: Cyclic meteorite streams?
--- Matson, Robert D. wrote: Hi E.P., While many have taken a look at annual fall patterns, I have often wondered if some meteorite falls are not instead cyclic, in other words come from intercepting recurring debris streams from asteroids? So far there is no (strong) evidence for any currently existing meteoroid streams that intersect earth's orbit, with the possible exception of fragments from 2003 EH1 (more on that later). Meteoroid streams (and comet streams, for that matter) have short dynamical lifetimes due to the combined effects of gravitational perturbations by the planets, solar radiation pressure, and Yarkovsky effect, and therefore become decoherent on time scales of 10,000 to 100,000 years. But the similarities between comet streams and meteoroid streams ends there; the mechanisms for producing the two different types of streams are quite different. Since it takes timeframes of longer than a million years for an asteroid to migrate from the inner main belt through a resonance into an earth- crossing orbit, the impact events (which produce the meteoroid streams) must occur *after* the asteroid has become a NEA. The probability of impacts between NEAs is much, much lower than the probability of an impact in the main belt, so you begin to see why meteoroid streams are not only short-lived, but rare. To summarize, you need three things to happen to have a meteoroid stream: 1. rare impact between two NEAs 2. the NEAs are in orbits that actually cross earth's orbit 3. #1 has occurred within the last 10^4-10^5 years Along those lines, why are meteor showers (comet debris stream intercepts) annual, and not cyclic on another basis? Because the date of a shower is tied to when the parent comet's orbit crosses the earth's orbit (nodal crossing). Perturbations will cause the comet's nodal crossing point to slowly precess over the centuries, so the date of each shower's peak does slowly drift, but nothing noticeable on decade time scales. It ~is~ possible for a comet (or an asteroid for that matter) to have an orbit that crosses earth's orbit in two locations: an ascending node and a descending node. In fact, the most famous comet, 1P/Halley has two crossings (Eta Aquarids in early May and the Orionids in late October.) (I'm not aware of any other comets that have two nodal crossings.) Now, 2003 EH1 is an interesting case as it has been tied to the Quadrantids. 2003 EH1 is in a highly inclined orbit that does not currently intersect earth's orbit. The closest it gets is about 0.21 a.u. However, only a few centuries ago its perihelion would have been inside earth's orbit. I still wouldn't call 2003 EH1 the source of a meteoroid stream, since its orbit is clearly cometary rather than asteroidal. In short, 2003 EH1 is an extinct comet nucleus. --Rob P.S. If you would, please forward to the Met-list; Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Check this out ! Personal Locator
Hi , Check this out. Here is a great tool for all of the outdoors man that spend time in remote areas. I have been looking at satellite phones for an upcoming hunt and this might be cheaper. Sonny http://www.findmespot.com/ __ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
