Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event !
Hello all, I have just looked at the superoutburst of 17P/Holmes, as follows: 2007 Oct. 24.72 UT: m1=2.8, Dia.=, DC=9, by NE Katsu. OHTSUKA Tokyo, JAPAN - Original Message - From: giovannisostero [EMAIL PROTECTED] To: mexicodoug [EMAIL PROTECTED] Cc: meteorite-list meteorite-list@meteoritecentral.com Sent: Thursday, October 25, 2007 1:22 AM Subject: Re: [meteorite-list] Fw: Comet 17P (Holmes) Visible Event ! Hi all, this is our BVR shot of 17P/Holmes in outburst (brightest object in the field center): http://tinyurl.com/2mxrmx Cheers, Giovanni and Ernesto __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Publications of the Carancas event ADDITIONAL
Hello Sterling, Thank you for letting me know your translation of the Bolivian publications, which is very interesting. Just before, I visited http://spaceweather.com/, where another latest infrasound analysis of the Peruvian event by Peter Brown (Univ. W. Ontario) is introduced. His team estimated the kinetic energy of the impactor about 0.03 kton TNT. Best wishes, Kastu - Original Message - From: Sterling K. Webb [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Cc: Rob Matson [EMAIL PROTECTED]; K. Ohtsuka [EMAIL PROTECTED] Sent: Tuesday, October 09, 2007 9:14 AM Subject: Re: [meteorite-list] Publications of the Carancas event ADDITIONAL Hi, I downloaded all the publications on the site (URL below) and started translating then, but... One is the earlier analysis which I already translated and posted a week ago. The two PowerPoint presentations are general presentations of craters (very nicely done, BTW -- muy bueno!) but don't mention Carancas. One is a press-release style .pdf that describes the event and spends a lot of time explaining what a meteorite is, that they come from the asteroids, that there are craters elsewhere on the planet, that the world is not ending, the usual... There are a few more .pdf are press releases. The only document with any specifics is their physical estimates of the impact and such, all taken from playing with the LPI online Impact Calculator; I recognize the language! Like I haven't already done that 300 times this last week (and you too). And if you're keeping score, the Bolivians (unlike the Peruvians) got the Universal Time of the event right. Sterling K. Webb -- -- - Original Message - From: K. Ohtsuka [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Monday, October 08, 2007 9:37 AM Subject: [meteorite-list] Publications of the Carancas event Hello list members, I have just reached the Carancas' publication list site in Peru: http://fcpn.umsa.bo/fcpn/app?service=page/Planetarium_PublicationList where some articles have already been introduced by some list members, but the rest ones are not introduced yet and seem indeed interesting, although I cannot understand Spanish at all. Does anyone translate and introduce their summary? Best wishes, Katsu OHTSUKA Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Publications of the Carancas event
Hello list members, I have just reached the Carancas' publication list site in Peru: http://fcpn.umsa.bo/fcpn/app?service=page/Planetarium_PublicationList where some articles have already been introduced by some list members, but the rest ones are not introduced yet and seem indeed interesting, although I cannot understand Spanish at all. Does anyone translate and introduce their summary? Best wishes, Katsu OHTSUKA Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Publications of the Carancas event
Sorry the link is by Mayor de San Andres Universitys Web site (UMSA) in Bolivia. Katsu - Original Message - From: K. Ohtsuka [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Monday, October 08, 2007 11:37 PM Subject: Publications of the Carancas event Hello list members, I have just reached the Carancas' publication list site in Peru: http://fcpn.umsa.bo/fcpn/app?service=page/Planetarium_PublicationList where some articles have already been introduced by some list members, but the rest ones are not introduced yet and seem indeed interesting, although I cannot understand Spanish at all. Does anyone translate and introduce their summary? Best wishes, Katsu OHTSUKA Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] COMET McNAUGHT like COMET WEST
Amazing COMET! COMET McNAUGHT is just reverse COMET WEST in 1976! http://spaceweather.com/comets/mcnaught/17jan07/Crause2.jpg http://www.spacew.com/gallery/image005564.html Katsuhito Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Week-Long Meteor Shower to Dazzle (Geminids)
Hello Sterling and all, Please see also the following papers on Apollo asteroid 2005 UD, mini Phaethon, if you are interested in: Title: Apollo asteroid 2005 UD: split nucleus of (3200) Phaethon? Authors: Ohtsuka, K.; Sekiguchi, T.; Kinoshita, D.; Watanabe, J.-I.; Ito, T.; Arakida, H.; Kasuga, Publication: Astronomy and Astrophysics, Volume 450, Issue 3, May II 2006, pp.L25-L28. The PDF file of my paper is in paper folder in the following link: http://briefcase.yahoo.co.jp/bc/tokyometeor/ Title: Physical Observations of 2005 UD: A Mini-Phaethon Authors: Jewitt, David; Hsieh, Henry Publication: The Astronomical Journal, Volume 132, Issue 4, pp. 1624-1629. The PDF file of Jewitt's paper is in the following link: http://www.ifa.hawaii.edu/faculty/jewitt/papers/2006/JH06.pdf Both Phaethon and 2005 UD are F or B-type asteroids, thus linking to thermally metamorphosed CI/CM. Katsuhito OHTSUKA Tokyo, JAPAN - Original Message - From: Sterling K. Webb [EMAIL PROTECTED] To: Ron Baalke [EMAIL PROTECTED]; Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Saturday, December 09, 2006 5:53 AM Subject: Re: [meteorite-list] Week-Long Meteor Shower to Dazzle (Geminids) Hi, Nice timing, since we've been talking about chunks of comet: A final point to note are that Geminids stand apart from the other meteor showers in that they seem to have been spawned not by a comet, but by 3200 Phaeton, an Earth-crossing asteroid. Then again, the Geminids may be comet debris after all, for some astronomers consider Phaeton to really be the dead nucleus of a burned-out comet that somehow got trapped into an unusually tight orbit. Discovered in 1983, Phaethon is 5100 meters in diameter and weighs in at 140,000,000 metric tons. It has a very dark surface and a density (vaguely) calculated at twice that of water. Despite being in a cometary orbit and being the parent body of a meteor stream in the same orbit, it has never shown any coma, dust, or gas outbursts. Dead comet? Asteroid? Or can we be sure there's really any difference? Yet? Phaethon approaches the Sun closer than any other numbered asteroid; its perihelion is only 0.140 AU, 58% of Mercury's orbital radius. The surface temperature at perihelion could reach ~1025 K. Obviously, it's not a ball of ice. If you plan on hanging around until 2093, it will closely approach the Earth, passing within 0.0198 AU, on December 14 of that year. Only a week and 87 years to go. 3200 Phaethon is one of the objects that fit unto a pattern of a past breakup of a Comet Encke parent body, based on its orbital properties, an admittedly controversial idea (but a good one). The asteroid 3200 Phaethon was discovered as an asteroid, confirmed, plotted, and published, before Fred (Mr. Comet) Whipple pointed out that its orbit was identical with that of the Geminids. Sterling K. Webb -- - - Original Message - From: Ron Baalke [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Friday, December 08, 2006 1:46 PM Subject: [meteorite-list] Week-Long Meteor Shower to Dazzle (Geminids) http://www.space.com/spacewatch/061208_night_sky.html Week-Long Meteor Shower to Dazzle By Joe Rao SPACE.com 08 December 2006 The annual Geminid meteor shower is expected to produce a reliable shooting star show that will get going Sunday and peak the middle of next week. The Geminid event is known for producing one or two meteors every minute during the peak for viewers with dark skies willing to brave chilly nights. If the Geminid Meteor Shower occurred during a warmer month, it would be as familiar to most people as the famous August Perseids. Indeed, a night all snuggled-up in a sleeping bag under the stars is an attractive proposition in summer. But it's hard to imagine anything more bone chilling than lying on the ground in mid-December for several hours at night. But if you are willing to bundle up, late next Wednesday night into early Thursday morning will be when the Geminids are predicted to be at their peak. Most satisfying shower The Geminids are a very fine winter shower, and usually the most satisfying of all the annual showers, even surpassing the Perseids. Studies of past displays show that this shower has a reputation for being rich both in slow, bright, graceful meteors and fireballs as well as faint meteors, with relatively fewer objects of medium brightness. Many appear yellowish in hue. Some even appear to form jagged or divided paths. Unfortunately, as was the case this year with its summertime counterpart, this year's December Geminids will be hindered somewhat by moonlight, although to a much lesser degree than the brilliant gibbous Moon that wreaked havoc with the Perseids. On Thursday
Re: [meteorite-list] Meteorites Used To Study Solar Activity AT LAST!!!
Hello list members, see the following link, http://www.aanda.org/index.php?option=com_contenttask=viewid=181Itemid=42lang=en where you can download the PDF file of the AA letter. Katsuhito O. Tokyo, JAPAN - Original Message - From: Rob McCafferty [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Thursday, September 28, 2006 7:00 AM Subject: [meteorite-list] Meteorites Used To Study Solar Activity AT LAST!!! Hi all This phenomena of cosmic ray alteration of isotope concentration has been known to me for a long while. As solar activity increases, it deflects the cosmic rays which reduces the effect of cosmic rays. On earth, one of it's best effects is altering the amount of Carbon 14 (C14) prodced during periods of high solar activity. C14 has a known half-life of approx 5800 years and is created constantly so all things once living have a known amount of it. Once they die, this proportion decreases. Less well known is that year on year, the proportion of C12/C14 changes according to solar activity. Correction factors have to be made in carbon dating. Individual tree rings can be measured for actual vs predicted C12/C14 ratios and a picture of solar activity can be build up. This method shows several things Tree rings from 1640 to 1710 show a big increase in C14 vs predicted signifying a low solar activity. This roughly corresponds to a period of low temperature. The Thames in London used to freeze each winter and was so thick fairs could be held on the ice. It suggests that in Roman times, temperatures were even warmer than today. Grapes can only be grown in south east England today. Back then they could be grown North of York. It also suggests a general increase in solar activity over the last few hundred years, since the Maunder minimum, in fact. We're on a rise now, apparently. If meteorites are also showing this trend, some credence must be give to the The Human Race is a bunch of arrogant idiots who think they are more influential in the Grand Scheme of Things than they really are school of thought which I aspire to ascribe. Equally, I suggest that this blip in the epochs of time should be a timely reminder not to mess with things too much as we really have no idea how much influence we really have. Just my thoughts for the subject. (DISCLAIMER: this post was not sponsored by Shell/BP/XXon/FINA/Texaco or any other petrolium industry, etc. The author cannot discount the possibility that the original meteorite study may have been. He would like to distance himself from any suggestions to that effect I think that puts me in the clear) Anon (just in case) --- Matson, Robert [EMAIL PROTECTED] wrote: Hi All, Who'da thunk that global warming could become an on-topic subject for the meteorite list?! --Rob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ron Baalke Sent: Tuesday, September 26, 2006 2:15 PM To: Meteorite Mailing List Subject: [meteorite-list] Meteorites Used To Study Solar Activity http://www.upi.com/NewsTrack/view.php?StoryID=20060926-015940-3936r Meteorites used to study solar activity UPI September 26, 2006 OULU, Finland (UPI) -- A Finnish-led international team has used meteorites to investigate the sun's solar activity of past centuries. Ilya Usoskin at Finland's Sodankyla Geophysical Observatory and colleagues compared the amount of Titanium 44 in 19 meteorites that have fallen to the Earth the past 240 years. They said their findings confirm that solar activity increased strongly during the 20th century. They also find the sun has been particularly active during the past few decades. The scientists say studying the sun's activity is one of the oldest astrophysical projects, as astronomers began recording the number of sunspots to trace the sun's magnetic activity 400 years ago. The team examined a set of 19 meteorites whose dates of fall are precisely known, measuring the amount of radioactive isotope Titanium 44 in each meteorite. Titanium 44 is produced by the cosmic rays in the meteorites while they are outside the Earth's atmosphere. After the meteorite has fallen, it stops producing the isotope. By measuring the Titanium 44 in the meteorites, the scientists determined the level of solar activity at the time the meteorite fell. The study appears in the journal Astronomy Astrophysics Letters. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ Meteorite-list mailing list
[meteorite-list] Great fireball in Japan
Hello list members, A great fireball was witnessed by numerous people in Japan on the night of August 9, 23:28:41 JST (=14:28:41 UT). Saturated images, due to its strong luminosity, were recorded by several CCD cameras in the Fireball Network in Japan, and now their data are processed. It maybe a member of the Capricornid meteor shower with the geocentric velocity of around 20 km/sec. If so, it is no meteorite dropping fireball. http://sonotaco.jp/forum/viewtopic.php?t=1080 Katsuhito O. Tokyo __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Tokyo Area Boloide...info required
Hello Dirk-san, This event? I could not see this bolide, too. http://sonotaco.jp/forum/viewtopic.php?t=929 Katsuhito O. Tokyo, JAPAN - Original Message - From: drtanuki To: meteorite-list@meteoritecentral.com Sent: Wednesday, April 12, 2006 5:58 PM Subject: [meteorite-list] Tokyo Area Boloide...info required Dear List, A boloide was seen and photographed in the Tokyo area while I was absent from Japan (in the past two weeks). My wife said film was shown on Japanese TV but she was not paying attention. I have done a websearch but found nothing. If I gain any information I will pass it on to the list. Best, Dirk Ross...Tokyo __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Problems with ebay
I was also troubled as well as Matteo, some five hours before. But, now no problem. That may be caused by the eBay website, I guess. Katsuhito O. Tokyo - Original Message - From: Michael Farmer [EMAIL PROTECTED] To: M come Meteorite Meteorites [EMAIL PROTECTED]; MeteoriteList meteorite-list@meteoritecentral.com Sent: Friday, February 24, 2006 12:53 AM Subject: Re: [meteorite-list] Problems with ebay That is very interesting, I have the same problem on my laptop when I go to the Comcast homepage, it will not open and IU get high pitched clicks non-stop. Any computer guru out there know what this might be? mike - Original Message - From: M come Meteorite Meteorites [EMAIL PROTECTED] To: MeteoriteList meteorite-list@meteoritecentral.com Sent: Thursday, February 23, 2006 12:58 AM Subject: [meteorite-list] Problems with ebay Hello its from yesterday I have problems to enter in My Ebay page on ebay.com. When I click this not open and it hears itself a continue click,click,click of background...you have the same problem? If I enter with ebay.it I not have this problem. Matteo M come Meteorite - Matteo Chinellato Via Triestina 126/A - 30030 - TESSERA, VENEZIA, ITALY Email: [EMAIL PROTECTED] Sale Site: http://www.mcomemeteorite.it Collection Site: http://www.mcomemeteorite.info MSN Messanger: spacerocks at hotmail.com EBAY.COM:http://members.ebay.com/aboutme/mcomemeteorite/ ___ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Harvey Awards - New Catagory
Yes from Tokyo, JAPAN Katsuhito OHTSUKA - Original Message - From: Greg Hupe [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Wednesday, January 25, 2006 4:24 AM Subject: [meteorite-list] Harvey Awards - New Catagory Dear List Members, A month or two ago I posted to the list that I felt that Steve Arnold - IMB and Phil Mani should be nominated for a Harvey Award for their Huge Brenham Main Mass discovery and also Geoff Notkin for his tireless work on behalf of the Hurricane Katrina Fund Raiser among other too-numerous to list meteorite-related activities. I know that Geoff and Steve originally set up the Harvey Awards where they could not nominate themselves for an award. I would like all list members to join me here on the list to nominate these fine gentleman for a Harvey Award an encourage them to make a new category where they could receive an award if enough of us voted YES to this. Maybe they could create a People's Choice award or something along these lines. Everyone in favor, send the list a resounding YES and lets acknowledge their contributions and achievements in public. Consider this my YES vote... Best regards, Greg Hupe The Hupe Collection NaturesVault (eBay) [EMAIL PROTECTED] IMCA 3163 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NIPR meteorite newsletter
Hello list, The latest NIPR meteorite newsletter ,vol.13 no.1 (pdf 17.0 Mb), was published, which includes some color pictures of thin sections and PTS. http://yamato.nipr.ac.jp/AMRC/AMRC/MeteoriteNewsletter_13-1.pdf K. Ohtsuka, TOKYO __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Unlocking the Organic Composition of AncientAsteroids
see also http://ads.nao.ac.jp/cgi-bin/nph-bib_query?bibcode=2005P%26SS...53.1280Samp;db_key=ASTamp;data_type=HTMLamp;format=amp;high=411ea5d28b29620 Kat. O., TOKYO - Original Message - From: Ron Baalke [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Saturday, October 08, 2005 1:28 AM Subject: [meteorite-list] Unlocking the Organic Composition of AncientAsteroids http://www.physorg.com/news7056.html Unlocking the organic composition of ancient asteroids by Gina Buss PhysOrg.com October 07, 2005 Meteorites contain fragments of asteroids brought about by collisions within the asteroid belt. These meteorites have not been exposed to geological processes experienced by planets and stars. Therefore, much of the matter in these meteorites originates from the formation of the Solar System some 4.5 billion years ago. Being the only record of the Solar System's pre-biotic chemical evolution, scientists have tried for years to extract and study this material. It is believed that discovering the composition of meteorites will reveal what the Solar System was made of at its birth and how those materials evolved into our current-day universe. Most of the methods used to extract this matter have failed leading to the destruction of the meteorite material or just the inability to extract any compounds. However, a recent study from the Planetary and Space Science Journal explains how scientists have developed a novel approach to extracting these meteoric materials. It's called hydropyrolysis. This new technology uses high hydrogen gas pressures, extreme temperature, and water as a non-destructive means for extracting organic and inorganic compounds from meteorites. This process has revealed high amounts of carbon and nitrogen- elements essential to life at the core of the meteorites. Also, this new technology revealed several never-before-seen organic molecules. The results of this study also contradict a common understanding to the origin of meteorites. It is thought that meteoric material originated from a molecular could that collapsed to form the Solar System. Scientists using hydropyrolysis believe this is a misconception and seek to use this technology to find the true origin of the organic matter in meteorites. Scientists hope that the use of this new technology will offer even more clues into the composition of the Solar System when it was forming. Finally researchers have a way to trace the evolutionary path of organic compounds which will ultimately lead to knowledge of the evolution of our universe. Reference: Sephton M, Love G, Meredith W, Snape C, Sun C, and Watson J. 2005. Planetary and Space Science Journal. Article in Press. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Hayabusa Begins Daring Close Encouter WithAsteroid
Hello Jeff-san You can find Itokawa's latest image(s) at the following site: http://www.isas.ac.jp/e/snews/index.shtml K. Ohtsuka, Tokyo Meteor Network - Original Message - From: Jeff Kuyken [EMAIL PROTECTED] To: Ron Baalke [EMAIL PROTECTED]; Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Thursday, September 15, 2005 9:02 AM Subject: Re: [meteorite-list] Hayabusa Begins Daring Close Encouter WithAsteroid Hi List, Does anyone have a link to images that Hayabusa is sending back? Thanks, Jeff - Original Message - From: Ron Baalke To: Meteorite Mailing List Sent: Thursday, September 15, 2005 9:27 AM Subject: [meteorite-list] Hayabusa Begins Daring Close Encouter With Asteroid http://www.spaceflightnow.com/news/n0509/14hayabusa/ Probe begins daring close encounter with asteroid BY STEPHEN CLARK SPACEFLIGHT NOW September 12, 2005 A $100 million Japanese space explorer parked in the vicinity of an enigmatic asteroid this week, allowing scientists to get a first glimpse of the mid-sized rock that will become the source of the first samples of such an object to ever be returned to Earth. After methodically tweaking its course - first by electrical ion propulsion, then by conventional chemical thrusters - toward its target over the past few months, the Hayabusa probe finally arrived at its station keeping position some 12 miles from the asteroid early Monday. Officials timed the arrival by when the 1,000-pound craft's closure rate relative to the object reached zero, indicating the probe was now essentially anchored in the gate position located about 12 miles from the space rock. That moment occurred as the spacecraft commanded its maneuvering jets to fire one last time at about 0117 GMT Monday, or in the late-morning hours in Japan. Hayabusa's ion drive propulsion system took a the leading role for the rendezvous up until August 28, when control switched to the liquid-fueled chemical thrusters. That milestone left the four ion engines with a cumulative burn time of almost 26,000 hours, and the system will be re-started once the probe embarks on the last leg of its journey back to Earth. The delicate space ballet took place almost 200 million miles from controllers on Earth, who left responsibility for the rendezvous to an on-board navigation system that is designed to operate without ground intervention. The goal of the mission is to study asteroid 1998 SF36 - later named Itokawa in honor of an early Japanese pioneer in rocketry. The object was discovered in September 1998 by a joint team consisting of scientists from the U.S. Air Force, NASA, and the Massachusetts Institute of Technology. Details about Itokawa have largely remained elusive in the seven years since its discovery, but scientists now have a much clearer picture of the potato-shaped asteroid estimated to measure 2,000 feet by around 900 feet. Its orbit stretches from inside Earth's out to a distance of 157 million miles from the Sun, making it a member of the Apollo class of near-Earth asteroids that pose potential impact threats to our planet. Astronomers studied Itokawa via several ground-based telescopes during its last Earth fly-by in 2001, and they found evidence that the asteroid was brighter and more reflective than first expected. Scientists had a difficult time predicting what Hayabusa would find as it closed in on the object, and many questions were left unanswered. However, many of those issues can now be thoroughly remedied with the new higher resolution images Hayabusa's optical asteroid multi-band imaging camera has captured. The pictures show a contrast of rocky and hilly terrain with smooth regions, but detailed analysis and sample retrieval will be conducted before scientists can announce the results of their detailed study. A first look at the new images appears to show a loose layer of dust and dirt-like material covering the smooth surfaces of parts of the asteroid, which is a surprise to some project officials. According to a certain theory, small objects do not have regolith, said Hayabusa project manager Jun Kawaguchi. But this asteroid seems to have smooth portions that appear (to have) some regolith. Work with Hayabusa's science payload has already begun, with the near-infrared and X-ray spectrometers now gathering measurements. The craft's laser altimeter is also conducting observations to learn more details about Itokawa's terrain. The pair of spectrometers will labor to determine the elemental and mineral composition of Itokawa to help astronomers in their quest to link asteroids and comets to meteorites that have fallen to Earth and been recovered. The analysis has just started and no conclusive results (are) given until the measurements are detailed and analyzed, Kawaguchi told Spaceflight Now. When we talk about the shape just from impression and not from a scientific point
Re: [meteorite-list] Hayabusa Begins Daring Close EncouterWithAsteroid
P.S. Color composite images (but still looks like b/w image) of Itokawa are released in Japanese page, but not yet in English page. http://www.isas.ac.jp/j/snews/2005/0914.shtml Katsu O. - Original Message - From: K. Ohtsuka [EMAIL PROTECTED] To: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Thursday, September 15, 2005 9:45 AM Subject: Re: [meteorite-list] Hayabusa Begins Daring Close EncouterWithAsteroid Hello Jeff-san You can find Itokawa's latest image(s) at the following site: http://www.isas.ac.jp/e/snews/index.shtml K. Ohtsuka, Tokyo Meteor Network - Original Message - From: Jeff Kuyken [EMAIL PROTECTED] To: Ron Baalke [EMAIL PROTECTED]; Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Thursday, September 15, 2005 9:02 AM Subject: Re: [meteorite-list] Hayabusa Begins Daring Close Encouter WithAsteroid Hi List, Does anyone have a link to images that Hayabusa is sending back? Thanks, Jeff - Original Message - From: Ron Baalke To: Meteorite Mailing List Sent: Thursday, September 15, 2005 9:27 AM Subject: [meteorite-list] Hayabusa Begins Daring Close Encouter With Asteroid http://www.spaceflightnow.com/news/n0509/14hayabusa/ Probe begins daring close encounter with asteroid BY STEPHEN CLARK SPACEFLIGHT NOW September 12, 2005 A $100 million Japanese space explorer parked in the vicinity of an enigmatic asteroid this week, allowing scientists to get a first glimpse of the mid-sized rock that will become the source of the first samples of such an object to ever be returned to Earth. After methodically tweaking its course - first by electrical ion propulsion, then by conventional chemical thrusters - toward its target over the past few months, the Hayabusa probe finally arrived at its station keeping position some 12 miles from the asteroid early Monday. Officials timed the arrival by when the 1,000-pound craft's closure rate relative to the object reached zero, indicating the probe was now essentially anchored in the gate position located about 12 miles from the space rock. That moment occurred as the spacecraft commanded its maneuvering jets to fire one last time at about 0117 GMT Monday, or in the late-morning hours in Japan. Hayabusa's ion drive propulsion system took a the leading role for the rendezvous up until August 28, when control switched to the liquid-fueled chemical thrusters. That milestone left the four ion engines with a cumulative burn time of almost 26,000 hours, and the system will be re-started once the probe embarks on the last leg of its journey back to Earth. The delicate space ballet took place almost 200 million miles from controllers on Earth, who left responsibility for the rendezvous to an on-board navigation system that is designed to operate without ground intervention. The goal of the mission is to study asteroid 1998 SF36 - later named Itokawa in honor of an early Japanese pioneer in rocketry. The object was discovered in September 1998 by a joint team consisting of scientists from the U.S. Air Force, NASA, and the Massachusetts Institute of Technology. Details about Itokawa have largely remained elusive in the seven years since its discovery, but scientists now have a much clearer picture of the potato-shaped asteroid estimated to measure 2,000 feet by around 900 feet. Its orbit stretches from inside Earth's out to a distance of 157 million miles from the Sun, making it a member of the Apollo class of near-Earth asteroids that pose potential impact threats to our planet. Astronomers studied Itokawa via several ground-based telescopes during its last Earth fly-by in 2001, and they found evidence that the asteroid was brighter and more reflective than first expected. Scientists had a difficult time predicting what Hayabusa would find as it closed in on the object, and many questions were left unanswered. However, many of those issues can now be thoroughly remedied with the new higher resolution images Hayabusa's optical asteroid multi-band imaging camera has captured. The pictures show a contrast of rocky and hilly terrain with smooth regions, but detailed analysis and sample retrieval will be conducted before scientists can announce the results of their detailed study. A first look at the new images appears to show a loose layer of dust and dirt-like material covering the smooth surfaces of parts of the asteroid, which is a surprise to some project officials. According to a certain theory, small objects do not have regolith, said Hayabusa project manager Jun Kawaguchi. But this asteroid seems to have smooth portions that appear (to have) some regolith. Work with Hayabusa's science payload has already begun, with the near-infrared and X-ray spectrometers now gathering measurements. The craft's laser altimeter is also
Re: [meteorite-list] Fireball video
Hello list, This image is of the possible meteorite-dropping fireball (more brighter than full moon) event observed on March 19, 2005, at 16:27:51 UT (not daytime but nighttime), in Japan. The image also shows terminal large-scale fragmentations. However, I don't know the reason why the image is listed in wackyvids.com. More detailed observational data are summarized in http://sonotaco.jp/forum/viewtopic.php?t=369postdays=0postorder=ascstart=0 sorry, written in Japanese language. K. Ohtsuka TOKYO, JAPAN - Original Message - From: Arizona Keith [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Thursday, August 04, 2005 1:50 PM Subject: [meteorite-list] Fireball video Hello List Check out this fireball video. Looks likes a daylight fireball. Anyone knows anything about it, there or when? http://www.wackyvids.com/movies/general/283/meteor.html or Wacky Vids web site http://www.wackyvids.com/ pick Meteor Keith V. Chandler, AZ. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Fireball video
P.S. This image was taken by SONOTACO at Tokyo using WATEC 100N CCD + CBC 6 mm f0.8. The orbital determination was carried out by S. Nakano as follows: http://www.oaa.gr.jp/~oaacs/yc/yc2475.htm K. Ohtsuka - Original Message - From: K. Ohtsuka [EMAIL PROTECTED] To: Arizona Keith [EMAIL PROTECTED]; meteorite-list@meteoritecentral.com Sent: Thursday, August 04, 2005 5:49 PM Subject: Re: [meteorite-list] Fireball video Hello list, This image is of the possible meteorite-dropping fireball (more brighter than full moon) event observed on March 19, 2005, at 16:27:51 UT (not daytime but nighttime), in Japan. The image also shows terminal large-scale fragmentations. However, I don't know the reason why the image is listed in wackyvids.com. More detailed observational data are summarized in http://sonotaco.jp/forum/viewtopic.php?t=369postdays=0postorder=ascstart=0 sorry, written in Japanese language. K. Ohtsuka TOKYO, JAPAN - Original Message - From: Arizona Keith [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Thursday, August 04, 2005 1:50 PM Subject: [meteorite-list] Fireball video Hello List Check out this fireball video. Looks likes a daylight fireball. Anyone knows anything about it, there or when? http://www.wackyvids.com/movies/general/283/meteor.html or Wacky Vids web site http://www.wackyvids.com/ pick Meteor Keith V. Chandler, AZ. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Japan Shoots For a Piece of an Asteroid(Hayabusa)
Hello Darren and list, See details about the HAYABUSA mission to S-type Asteroid (25143) Itokawa: http://www.hayabusa.isas.jaxa.jp/e/index.html The Japanese spacecraft HAYABUSA will encounter Itokawa Oct.- Nov. this year, then will probe into and will retrieve the sample around only 1 gram in total. By the way, the reflectance spectral data of Itokawa corresponds to LL chondrite (LL5 or 6), so if this sample return mission succeeds in and the analyses of the Itokawa sample prove Itokawa to be LL, then the market price to LL chondrites may respond and rise sharply. Lets obtain LL chondrites now K. Ohtsuka - Original Message - From: Darren Garrison [EMAIL PROTECTED] To: Ron Baalke [EMAIL PROTECTED] Cc: Meteorite Mailing List meteorite-list@meteoritecentral.com Sent: Wednesday, June 08, 2005 6:12 AM Subject: Re: [meteorite-list] Japan Shoots For a Piece of an Asteroid(Hayabusa) On Tue, 7 Jun 2005 13:45:53 -0700 (PDT), Ron Baalke [EMAIL PROTECTED] wrote: The Hayabusa probe is slowly closing in on a distant asteroid named Itokawa. Within a few months, after surveying the asteroid thoroughly Hadn't heard about this mission. Anyone know what class of asteroid this is supposed to be? __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] I am home from Tokyo
Hello Michael I am living in near Tokyo, so I have often been to the Tokyo Mineral Fair (TMF). Indeed, it is rumored that it seems very closed show for non-regular dealers like you. Additionally saying is that Japanese people are in depression and in deflation cycle under silly economic policy, so the meteorite dealers cannot gained so much money there now I guess. I know other rumors concerning TMF, and I don't like TMF. You had better participate the Tokyo Mineral Show (TMS) in December rather than this Tokyo Mineral Fair. Do you remember that I purchased a nice Allende specimen including DI from you in TMS last year? This is one of my favorite specimens. Thanks. K. Ohtsuka - Original Message - From: Michael Farmer [EMAIL PROTECTED] To: meteorite-list@meteoritecentral.com Sent: Tuesday, June 07, 2005 3:29 PM Subject: [meteorite-list] I am home from Tokyo Hi everyone, I am home a little early from Tokyo, and am preparing now for the Ensishiem and St Marie aux Mines shows in France. Anyone who wants anything, let me know now so that I can prepare it, ship it, or bring it to France. I will be traveling on from there back to Asia, and will not be bringing much at all to Europe. So please make your requests now. On to other business: Just a quick note about the Tokyo show, and just to squash any rumors before they start, something occurred there that needs to be addressed now, not when people start spreading rumors. Hans Koser and I went to Tokyo, and managed to acquire a table at the show, directly from the show owner, when another dealers material was stuck in customs. That table unfortunately was next to Marvin and Kitty Kilgore. We agreed from the start not to put meteorite specimens on the table (as this would compete too much with Marvin). Hans and I both had mineral specimens, and meteorite jewelry, spheres, and eggs made of meteorites. Within an hour of setting up the table (the show had already started) there was a meeting with Marvin Kilgore and Bud Eisler. The complained to the show owner several times, then Kitty Kilgore came in and saw us there and she got the show owner, then they forced us to be kicked out of the show. There was of course, an argument and although nothing serious, there was no happiness between Hans, myself nor Marvin. He tried to explain that it was not personal, only business. Of course, any of you can imagine how much it costs to go to Tokyo, shipping material, then being thrown out of the show barely two hours after it opened. This was not a nice thing to do, and we had only jewelry and manufactured items on our table, Kilgore had none of that, only large specimens for sale. Eisler did have lots of meteorite jewelry, but he was nowhere near us. This is a pretty bad situation, and no need to make it worse with rumors. It was several dealers being jealous and not wanting competition at a show, and that was that. Since I have never attended that show, the show owner bowed to the complaints of Bruno and Carine, Marvin, and Eisler and kicked us out. Bruno complained to me the moment he saw me in Tokyo. Any of you who know Hans Koser knows that he is the nicest guy in the world, who works on very little money, and who this hurt extremely badly. He did not deserve that sort of treatment, nor did I as I hardly know Bud Eisler (even though he lives in Tucson) and have always considered Marvin a close friend. Needless to say, that is over with this action. There are two sides to every story, and Marvin tried to tell me that he was kicked out of there before and it was then only fair that I got kicked out ( I don't buy that argument at all), and that there were too many meteorite dealers there (again, so what) and those things made it ok to kick two friends to the curb and force them to lose $4000 to $6000 each in expenses! There were many witnesses to what happened, and if you don't believe me, ask Hans. I am a firm believer in what goes around, comes around. Mike Farmer __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Final announcement of The 29th Symposium
Hello David-san, I appreciate your link to the Antarctic Meteorite Research #16 (NIPR) papers that you provided to the List some time ago, I was previously unaware of this online resource. I have also found the 2004 papers from this link by changing the numbers. Am I correct in presuming that the 29th Symposium will result in the ARM #18, available later online? Maybe, but, it will be published in AMR no.19. AMR #18 has already been published. AMR is the publication for the papers submitted to the Symposium on Anterctic Meteorites held at NIPR every year, as annual publication. I presently read papers published in MAPS and GCA and the abstracts from the MetSoc and LPSC conferences. I compile much of the relevant information onto my website meteoritestudies.com, perhaps you've visited this site before? Can you tell me how I may possibly purchase a copy of the International Symposium - Evolution of Solar System Materials, from September 2003, or access the published papers somehow? These 83 papers are listed in the AMR #17 but are not accessible, and I'd love to be able to read them. Please let me know if this is possible. All the proceeding (PDF) papers of this Symposium, like LPSC-style, were opened in the NIPR web until last year, but, regrettably, now closed. AMR #17 is not the same publication as this proceedings. So, you should ask about the Proceedings to Dr. A. Yamaguchi whose address appears in the end of the Final announcement of the Symposium. By the way you can get the papers of AMRs from #4 to #16 through ADS. http://ads.nao.ac.jp//bib_abs.html#top where you should fill AMR in Journal Name/code field along with Volume number 4 - 16, that you want to browse, in Volume field. You can also accsess AMR #10 - #18 in NIPR website. http://yamato.nipr.ac.jp/AMRC/EN/index1.html Sincerely, K. Ohtsuka __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Final announcement of The 29th Symposium on Antarctic Meteorites
Hello list members, Does anyone participate this symposium (held in June 7-9, 2005) at NIPR, Japan? http://yamato.nipr.ac.jp/AMRC/researcher/symposium2.html K. Ohtsuka, TMN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] NWA 3118 CV3 Chondrule-Field Update
Hello List members, See also Mineralogy of dark inclusions in CV by Brearly Jones in Planetary Materials, Reviews in Mineralogy vol. 36, p3-225, which is a well-written review for CV DI, I guess. K. Ohtsuka, Tokyo - Original Message - From: [EMAIL PROTECTED] To: Meteorite-list@meteoritecentral.com Sent: Thursday, February 24, 2005 1:26 AM Subject: [meteorite-list] NWA 3118 CV3 Chondrule-Field Update What does all this mean? Hello Walter, Bill, and List, I'll try to go through this in little steps: examination of the inclusion ...shows it to consist of small chondrules and chondrule fragments composed of very magnesian olivine (Fa1.1) The chondrules in the lower right part of the 32-gram slice are much smaller than chondrules in the remaining CV3 matrix like chondrules in CO3 chondrites that are much smaller. See also O.R. Norton's Encyclopedia, pp. 135-136 and p. 136, Fig. 7.19: While the average chondrule-diameter of a CV is about 1 mm, the average for a CO chondrite is about 0.15 mm. small chondrules ... composed of very magnesian olivine (Fa1.1) O.R. Norton, 135: most [chondrules in CO chondrites] are porphyritic olivine chondrules with olivine made of nearly pure forsterite. O.R. Norton, p. 312, Appendix C, Minerals in Meteorites: Forsterite = the magnesium end member of the olivine ... (Mg2SiO4) The chemical formula shows it is *magnesian* olivine and Fa1.1 shows there is hardly any trace of iron. The opposite end member is fayalite (Fe2SiO4), the iron end member (here it is iron that is missing). with marginal Fe-rich reaction zones (Fa36.9) Imagine a small rim around the chondrules. These outer zones reacted with FeO-rich (iron-rich) olivine in the surronding matrix and thereby became enriched in Fe (not just Fa1.1 [iron-poor] but Fa36.9 [iron-rich]). against a porous matrix composed of felted blades of relatively ferroan olivine (Fa40.9-45.9) with accessory troilite and pentlandite. Here is what I already said the matrix is rich in olivine that contains a lot of iron and not as much magnesium as those magnesian chondrules. This clast has the attributes of Type A/B dark inclusions ... Dark inclusions are lithic fragments up to about 5 cm in size. They have been found in several CV3 chondrites, for example in Allende, Vigarano, Leoville, etc.). Their main mineral component is fayalitic olivine. Some are chondrule-rich, some are chondrule-free (consist almost entirely of matrix)*. *Reference: WEISBERG M.K. et al. (1998) Fayalitic olivine in CV3 chondrite matrix and dark inclusions: A nebular origin (MAPS 33-5, 1998, 1087-1099). This clast has the attributes of *Type A/B* dark inclusions ... HUTCHISON R. (2004) Meteorites: A Petrologic, Chemical, and Isotopic Synthesis (Cambridge Planetary Science Series, p. 62): Porphyritic chondrules may be type I and FeO-poor or type II and FeO-rich They may additionally be subdivided into two categories: - silica-poor A - silica-rich B AB is intermediate. Oxygen isotope analysis ... gave replicate (= duplicate) values of: d17O = +0.08, -0.18; d18O = 5.14, 4.99; D17O = -2.63, -2.81 per mil, respectively, which plot on the best fit line for whole rock CV chondrites. See O.R. Norton, p. 135 or McSWEEN H.Y. (1999) Meteorites and Their Parent Planets, p.51: The oxygen isotopic compositions provide one means of classifying chondrites into clans and groups. When you look at these plots in Norton or McSween, you'll see that these values are in the range for CV chondrites but very close to the area for CM chondrites (which are much more primitive than CVs and point toward aqueous activity and aqueous alteration on their parent bodies. So this clast may represent a more hydrated relict part of a CV parent body the other parts of which are more dehydrated due to parent body metamorphism. A piece from a boundary area between more and less dehydrated material? A pocket (or clast) of more primitive material embedded into the higher metamorphosed CV3 material? a specimen that clearly demonstrates what the above report describes: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=6513101418 Best wishes, Bernd __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Antarctic Meteorite Research No.16
Hello List, Now, you can download free papers of Antarctic Meteorite Research No.16, featured the Yamato nakhlites: http://yamato.nipr.ac.jp/AMRC/amr16/amr16.html Sincerely, Katsuhito OHTSUKA Tokyo, JAPAN __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
