Hi John, Here's the list of 13.
Příbram 4/7/1959 Lost City 1/4/1970 Innisfree 2/6/1977 Peekskill 10/9/1992 Tagish Lake 1/18/2000 Morávka 5/6/2000 Neuschwanstein 4/6/2002 . Park Forest 3/27/2003 Villalbeto de la Peña 1/4/2004 Bunburra Rockhole 7/20/2007 Almahata Sitta 10/7/2008 Jesenice 4/9/2009 Grimsby 9/26/2009 Cheers, Frank ----- Original Message ---- From: John.L.Cabassi <j...@cabassi.net> To: Shawn Alan <photoph...@yahoo.com>; Meteorite Central <meteorite-list@meteoritecentral.com> Sent: Wed, January 18, 2012 6:31:49 PM Subject: Re: [meteorite-list] POP QUIZ FRIDAYS ANSWER AND WINNER OF THE ORNANSMETEORITE G'Day Shawn Now that was a definite curve ball and a misunderstanding on my behalf. Your question was "How many meteorite falls are there with accurate tracking data on atmospheric passage?" I think the key words are "meteorite" and "falls". Correct me if I'm wrong. I found Almahata Sitta is one of the most accurate recorded falls of all time. I also see "interplanetary meteoroids and small asteroids" of your suggested reading. My question to you, regardless of the contest which I appreciate your generosity and my continued education; we have a conflict with meteoroids and meteorites. I'm interested to know in what you have posted, what meteorite falls make up this 13? Can you elaborate on their names of what actually hit the ground as a meteorite? Just curious. An over-active mind Cheers John Cabassi IMCA # 2125 -----Original Message----- From: meteorite-list-boun...@meteoritecentral.com [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Shawn Alan Sent: Wednesday, January 18, 2012 4:51 PM To: Meteorite Central Subject: [meteorite-list] POP QUIZ FRIDAYS ANSWER AND WINNER OF THE ORNANSMETEORITE Hello Listers Sorry for the delay been busy with other projects. I would like to give a shout out to the Mars meteorite and the finalized name :) cool stuff, cant wait to read about it in my MAPS. If people do not know what I am talking about go to http://www.meteoriticalsociety.org/ an join the CLUB it worth every penny. Now back to the QUIZ I would like to say thank you Listers for sending in your answer :) Question How many meteorite falls are there with accurate tracking data on atmospheric passage? Answer 13 If you like to read up on this keep on reading........... Very low strengths of interplanetary meteoroids and small asteroids 1. Olga POPOVA1,*, 2. Jiří BOROVIČKA2, 3. William K. HARTMANN3, 4. Pavel SPURNÝ2, 5. Edwin GNOS4, 6. Ivan NEMTCHINOV1,†, 7. Josep M. TRIGO-RODRÍGUEZ5 Article first published online: 29 SEP 2011 DOI: 10.1111/j.1945-5100.2011.01247.x © The Meteoritical Society, 2011 Issue Meteoritics & Planetary Science Volume 46, Issue 10, pages 1525–1550, October 2011 Abstract– We have assembled data on 13 cases of meteorite falls with accurate tracking data on atmospheric passage. In all cases, we estimate the bulk strength of the object corresponding to its earliest observed or inferred fragmentation in the high atmosphere, and can compare these values with measured strengths of meteorites in the taxonomic class for that fall. In all 13 cases, the strength corresponding to earliest observed or inferred fragmentation is much less than the compressive or tensile strength reported for that class of stony meteorites. Bulk strengths upon atmospheric entry of these bodies are shown to be very low, 0.1 to approximately 1 MPa on first breakup, and maximal strength on breakup as 1–10 MPa corresponding to weak and “crumbly” objects, whereas measured average tensile strength of the similar meteorite classes is about 30 MPa. We find a more random relation between bulk sample strength and sample mass than is suggested by a commonly used empirical power law. We estimate bulk strengths on entry being characteristically of the order of 10−1–10−2 times the tensile strengths of recovered samples. We conclude that pre-entry, meter-scale interplanetary meteoroids are typically highly fractured or in some cases rubbly in texture, presumably as a result of their parent bodies’ collisional history, and can break up under stresses of a few megapascals. The weakness of some carbonaceous objects may result from very porous primordial accretional structures, more than fractures. These conclusions have implications for future asteroid missions, sample extraction, and asteroid hazard mitigation. source: http://onlinelibrary.wiley.com/doi/10.1111/j.1945-5100.2011.01247.x/abstract I would like to congratulate Brett W for being the first to submit the correct answer because there was on 7th Lister that got the answer right. He will be getting a free Ornans 5mg fragment. Till next time keep on rocking Shawn Alan IMCA 1633 eBay Store http://www.ebay.com/sch/ph0t0phl0w/m.html? ______________________________________________ HAPPY HOLIDAYS!! Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ HAPPY HOLIDAYS!! Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ HAPPY HOLIDAYS!! Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
