[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: NWA 5511 Contributed by: Phil Morgan http://www.tucsonmeteorites.com/mpod.asp __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Update
Great news, For those of you who helped get Gary Foote get into the experimental Cancer treatment program by participating in buying his meteorite collection: Things here are going well for him in the program. To date Gary has had very little side effects from the chemotherapy. CJ, his wife, passes on, Thank the Lord. We have been so busy but I must take time to thank the buyers. They are great people Without your help Gary would not have been able to get into the Treatment program. Thanks, everyone, Michael __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD-ebay auctions ending Sat, Sep 28
Aloha Meteorite afficianados, Big Kahuna has meteorites in auctions on ebay that end this Saturday, Sep 21, starting at 8:00am Pacific / 11:00am Eastern / 4:00pm London / 6:00pm Helsinki / 11:00pm Singapore. FREE Worldwide shipping on select meteorites. Some of the items on the block are: Allende CV3 6.91g Fresh fragrant fragment -http://tinyurl.com/mhn2twr Bassikounou H5 6.65g Fresh crusted stone - http://tinyurl.com/lon34jq Camel Donga Euc 4.34g Glossy crusted - http://tinyurl.com/lchba4d Canyon Diablo IAB 14.55g Natural patina - http://tinyurl.com/k97ebm5 Chelyabinsk LL5 1.13g Impact melt nodule - http://tinyurl.com/ka2thbv Chelyabinsk LL5 5.09g Crusted endcut - http://tinyurl.com/mcdzsk7 Chergach H5 10.79g RARE Impact melt - http://tinyurl.com/mcwj6hc Gao-Guenie H5 8.64g RARE Impact melt - http://tinyurl.com/l9mgpha Honolulu L5 0.24g RARE Hawaiian fall - http://tinyurl.com/o33vfgs Jbilet Winselwan CM2 0.78g Fresh frag - http://tinyurl.com/olln3tv Jbilet Winselwan CM2 0.72g Crusted slice - http://tinyurl.com/pt8xov3 Mreira L6 5.15g Complete individual - http://tinyurl.com/pas87oz Murchison CM2 0.50g Fresh full slice - http://tinyurl.com/mhur76b SaU 290 CH3 0.10g RARE carbo endcut - http://tinyurl.com/m8qpylh Sikhote Alin IIAB 16.50g Kick Astro iron - http://tinyurl.com/le77x34 Tatahouine Dio 3.27g The Green meteorite - http://tinyurl.com/nybcsxd Tuxtuac LL5 12.16g 1975 Mexican fall - http://tinyurl.com/mea7sng Vaca Muerta Mes 18.30g Natural patina - http://tinyurl.com/k9a2ta8 NWA x OC 183.09g Spectacular regs! - http://tinyurl.com/mq3k6sf NWA 7939 LL4-6 10.26g Breccia slice - http://tinyurl.com/l4qcyny NWA 7942 CV3 0.64g My new CV3 cargo - http://tinyurl.com/k37ss7r Agoudal Shattercone from impact structure - http://tinyurl.com/kby3tyn Bediasite tektite 6.57g Well detailed - http://tinyurl.com/lqupyhx Libyan Desert Glass Impactite 15.59g - http://tinyurl.com/lnyau7s Steinheim Shattercone 77.06g Fantastic - http://tinyurl.com/kc5y297 … and much more. You can see all of my offerings on ebay here: http://www.ebay.com/sch/fujmon/m.html Gary Fujihara Big Kahuna Meteorites Inc. PO Box 4175, Hilo, HI 96720 (808) 640-9161 http://bigkahuna-meteorites.com/ http://www.ebay.com/sch/fujmon/m.html __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] New Collection Gallery
I have just re-done my meteorite collection gallery. If you are interested, please have a look here: http://milehighmeteorites.zenfolio.com/ It is also linked from my website at http://www.mhmeteorites.com Thanks, Matt Morgan Mile High Meteorites __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NASA Wants Investigations for a Mars 2020 Rover
http://www.jpl.nasa.gov/news/news.php?release=2013-294 NASA Wants Investigations for a Mars 2020 Rover Jet Propulsion Laboratory September 26, 2013 NASA has released its announcement of an open competition for the planetary community to submit proposals for the science and exploration technology instruments that would be carried aboard the agency's next Mars rover, scheduled for launch in July/August of 2020. The Mars 2020 rover will explore and assess Mars as a potential habitat for life, search for signs of past life, collect carefully selected samples for possible future return to Earth, and demonstrate technology for future human exploration of the Red Planet. Officially called the Mars 2020 Mission Investigations Announcement of Opportunity (AO), this competition solicits flight investigations for which each principal investigator or scientist is responsible for a complete space flight investigation, including instrument hardware, mission operations and data analysis. The total allocated cost for development of all the investigations selected and funded by NASA is approximately $130 million. The competitively selected instruments will be placed on a rover similar to Curiosity, which landed on Mars in August 2012. Using Curiosity's design will help minimize mission costs and risks and deliver a rover that can accomplish the mission objectives. The Mars 2020 mission also would build upon the scientific accomplishments of Curiosity and other previous Mars missions. So what is different about Mars 2020? In January 2013, NASA appointed a Science Definition Team to outline objectives for the Mars 2020 mission. The team, composed of 19 scientists and engineers from universities and research organizations, proposed a mission concept that could accomplish several high-priority planetary science goals and be a major step in meeting President Obama's challenge to send humans to Mars in the 2030s. According to the Science Definition Team, looking for signs of past life is the next logical step. The Mars 2020 mission will provide a unique capability to address the major questions of habitability and life in the solar system, said Jim Green, director of NASA's Planetary Science Division in Washington. The science conducted by the rover's instruments also would expand our knowledge of Mars and provide the context needed to make wise decisions about whether to return any collected samples to Earth. This rover will make measurements of mineralogy and rock chemistry down to a microscopic scale, so that we might be able to understand the Martian environment surrounding the rover's landing site and identify evidence of possible past life. The 2020 rover could also make measurements and conduct technology demonstrations to help designers of a human expedition understand any hazards posed by Martian dust and demonstrate how to collect carbon dioxide, which could be a resource for making oxygen and rocket fuel. The Mars 2020 rover will test technologies that are key to one-day landing human explorers on the Red Planet, said Jason Crusan, director of NASA's Advanced Exploration Systems Division. New technologies could allow astronauts to live off the land as they explore the ancient valleys of Mars. The capability to manufacture breathable air, rocket fuel, water and more may forever change how we explore space. To view the Announcement of Opportunity online, visit: http://solicitation.nasaprs.com/Mars2020 . Guy Webster 818-354-6278 Jet Propulsion Laboratory, Pasadena, Calif. guy.webs...@jpl.nasa.gov 2013-294 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Dawn Reality-Checks Telescope Studies of Asteroids
http://www.jpl.nasa.gov/news/news.php?release=2013-293 Dawn Reality-Checks Telescope Studies of Asteroids Jet Propulsion Laboratory September 27, 2013 Tantalized by images from NASA's Hubble Space Telescope and ground-based data, scientists thought the giant asteroid Vesta deserved a closer look. They got a chance to do that in 2011 and 2012, when NASA's Dawn spacecraft orbited the giant asteroid, and they were able to check earlier conclusions. A new study involving Dawn's observations during that time period demonstrates how this relationship works with Hubble and ground-based telescopes to clarify our understanding of a solar system object. Since the vast majority of asteroids can only be studied remotely by ground-based and space-based facilities, confirming the accuracy of such observations using in-situ measurements is important to our exploration of the solar system, said Vishnu Reddy, the lead author of a paper published recently in the journal Icarus. Reddy is based at the Planetary Science Institute in Tucson, Ariz., and the Max Planck Institute for Solar System Research in Katlenburg-Lindau, Germany. In the paper, Reddy and other members of Dawn's framing camera team describe how up-close observations of Vesta have confirmed and provided new insights into more than 200 years of Earth-based observations. Vesta, the second most massive asteroid in the main asteroid belt, differs from most garden-variety asteroids in having a crust, mantle and core like our Earth. Early ground-based observations of Vesta, which was discovered in 1807, showed that Vesta's color and surface composition changed as it rotated around its axis. Astronomers using NASA's Infrared Telescope Facility at Mauna Kea in Hawaii saw distinct compositional units. It wasn't until Dawn arrived at Vesta that scientists determined the fine details and the exact distribution of these color variations, and the difference in composition between these regions. A generation of scientific questions framed on the basis of lower-resolution data have been resolved by visiting Vesta with Dawn, said Dawn Principal Investigator Christopher Russell, who is based at the University of California, Los Angeles. We chose to go to Vesta because the ground-based telescopes and, later, Hubble told us it was an interesting place. That was true, but we needed Dawn to discern the mineral distribution and history of Vesta's surface. We now know how these data sets tie together and complement each other. This will help us in our telescopic studies of other members of our solar system. One particularly useful comparison for future work on asteroids or other solar system objects involves comparing Dawn's framing camera data to data from Hubble. With Hubble, astronomers first saw the giant impact basin near the south pole of Vesta and also identified numerous bright and dark features on Vesta that correspond to different compositional units. It wasn't until Dawn's framing camera provided high-resolution views of Vesta that scientists were able to see the detailed contours of the giant impact basin that came to be called Rheasilvia and saw how bright the brightest materials were and how dark the dark materials were. Dawn's observations also showed that there was an older, overlapping giant impact basin under Rheasilvia. The bright materials appear to be pristine rocks native to Vesta, while the carbon-rich dark material appears to have been brought to Vesta from afar. When Dawn got to Vesta, it showed us how accurate Hubble's data were about Vesta, said Planetary Science Institute research scientist Jian-Yang Li, the Dawn participating scientist who mapped out the surface of Vesta using Hubble data. And it also showed us how Vesta was so much more interesting up-close. Other paper co-authors include Robert Gaskell and Lucille Le Corre of the Planetary Science Institute. Launched in 2007, Dawn orbited Vesta for more than a year, departing in September 2012. Dawn is now on its way to the dwarf planet Ceres and will arrive there in early 2015. The Dawn mission to Vesta and Ceres is managed by NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, for NASA's Science Mission Directorate, Washington. The University of California, Los Angeles, is responsible for overall Dawn mission science. The Dawn framing cameras were developed and built under the leadership of the Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany; with significant contributions by DLR German Aerospace Center Institute of Planetary Research, Berlin; and in coordination with the Institute of Computer and Communication Network Engineering, Braunschweig. The framing camera project is funded by the Max Planck Society, DLR and NASA. Jia-Rui Cook 818-354-0850 Jet Propulsion Laboratory, Pasadena, Calif. jcc...@jpl.nasa.gov Alan Fischer 520-382-0411 Planetary Science Institute, Tucson, Ariz. fisc...@psi.edu 2013-293
[meteorite-list] Mars Odyssey THEMIS Images: September 23-27 2013
MARS ODYSSEY THEMIS IMAGES September 23-27 2013 o Daedalia Planum (23 September 2013) http://themis.asu.edu/zoom-20130923a o Rabe Crater Dunes (24 September 2013) http://themis.asu.edu/zoom-20130924a o Pollack Crater (25 September 2013) http://themis.asu.edu/zoom-20130925a o Rabe Crater Dunes (26 September 2013) http://themis.asu.edu/zoom-20130926a o Channel (27 September 2013) http://themis.asu.edu/zoom-20130927a All of the THEMIS images are archived here: http://themis.asu.edu/latest.html NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in co.oration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New Collection Gallery
Nicely done Matt, some amazing and stunning pieces! :-) Cheers Martin On 27 September 2013 17:15, m...@mhmeteorites.com wrote: I have just re-done my meteorite collection gallery. If you are interested, please have a look here: http://milehighmeteorites.zenfolio.com/ It is also linked from my website at http://www.mhmeteorites.com Thanks, Matt Morgan Mile High Meteorites __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Martin Goff www.msg-meteorites.co.uk IMCA #3387 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Met Bulletin Update - 196 Approvals, NWA, Sahara, Winner South Dakota
Hi Bulletin Watchers, 196 new approvals. Most are OC's from the Sahara dense collection area. There are also some NWA's, Nevada, and one find from South Dakota (Winner). Link to all new approvals - http://www.lpi.usra.edu/meteor/metbull.php?sea=sfor=namesants=falls=valids=stype=containslrec=50map=gebrowse=country=Allsrt=namecateg=Allmblist=Allrect=phot=snew=1pnt=Normal%20tabledr=page=1 Link to Winner - http://www.lpi.usra.edu/meteor/metbull.php?code=58292 Best regards and happy huntings, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Met Bulletin Update - 196 Approvals, NWA, Sahara, Winner South Dakota
Hi Mike, Winner is definitely a winner. The write-up does not mention that UNM and ASU both now have full slices of Winner in their collections. Beautiful and unusual OC, South Dakota meteorite! Best regards, Carl * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Fri, Sep 27, 2013 at 1:07 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Bulletin Watchers, 196 new approvals. Most are OC's from the Sahara dense collection area. There are also some NWA's, Nevada, and one find from South Dakota (Winner). Link to all new approvals - http://www.lpi.usra.edu/meteor/metbull.php?sea=sfor=namesants=falls=valids=stype=containslrec=50map=gebrowse=country=Allsrt=namecateg=Allmblist=Allrect=phot=snew=1pnt=Normal%20tabledr=page=1 Link to Winner - http://www.lpi.usra.edu/meteor/metbull.php?code=58292 Best regards and happy huntings, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Ad Historic meteorites; UCLA-Allende, Monnig-Deports, IOM-Canyon Diablos and more
Hi all I have several interesting meteorite for sale this time. https://picasaweb.google.com/109538410126952617536/Sept272013?authuser=0authkey=Gv1sRgCMbKl4X117TAzgEfeat=directlink Allende A very nice 50% crusted piece with giant CAI exposed on the surface. It comes from the famous FC Leonard collection at UCLA. Allende now sells for $15 or more per gram. I will sell this one with the excellent provenience for only $15 per gram! 38.3 grams $575 Xining L5 Fell Feb 12 2012 China nice sample with crust. 4.57 g $46 Bells C2 ungrouped Fell Sept 9th 1961 I always wanted one of these as it fell a mere 30 days before my actual birth date. These are just never offered for sale. Very rare classification and even rarer if you consider falls only. 0.028 g $56 Deport These are part of recent discovery by Blaine Reed of the marked piece by Oscar Monnig. If you are unfamiliar with the story Arnaud Mignan has done a beautiful job describing its history. http://www.thetricottetcollection.com/pub_met_MonnigNumbers.html These have easily sold for $15/gram by other dealers. I offer them here for only $10.00 / gram. 1P 97.2 g $970 1E 104.1 g $1040 1AI 148.2 g $1480 1AL 200.0 g $2000 Canyon Diablo All of these were obtained by Edwin Thompson who traded them from the IOM in Albuquerque. He had a large lot of these at Tucson earlier this year. With the exception of the largest piece I picked out the pieces that had the first generation numbers on them. That is the CD numbers you see in the photos. These were far less common than the pieces with the more current K numbers. Unfortunately there are no labels from the IOM but all the CD pieces come with the original collection bags. The CD pieces are priced at $2/g and the larger K piece at $1.50. K-125 228.3 $456 CD 23.6 54.0 $108 CD 23.7 36.9 $73 CD 23.8 33.2g $66 CD 23.12 31.4g $62 CD 23.14 22.7g $45 Gebel Kamil I picked these out from a large lot. These have lots of character that is not always captured in a photo. Priced to sell at $0.50 / g 123.0 $246 96.1 $48 79.9 $40 39.7 $20 https://picasaweb.google.com/109538410126952617536/Sept272013?authuser=0authkey=Gv1sRgCMbKl4X117TAzgEfeat=directlink Leftovers from my last sale: https://picasaweb.google.com/109538410126952617536/PartSale1?authuser=0authkey=Gv1sRgCL7h5LitksGebQfeat=directlink All of these go onto Ebay in my store so if you are interested in any let me know as soon as possible. Katol (Provisional) Primative Achondrite Fell May 22, 2012 7.03 g Nice half stone with rich black fusion crust. Exposed surface is naturally broken not cut and polished $500.00 reduced to $400.00 Katol (Provisional) 2.98 g Whole stone at least 95%. Most of the recovered stones from this fall are much larger. $400.00 reduced to $350.00 Battle Mountain L6 Fell August 22, 2012 Nevada 3.82 g Fragment with one cut face. $191.00 reduced to $153.00 Zagami Martian 0.39g Nice fragment with one cut face. $195.00 reduced to $156.00 Zagami Martian 2.86g Nice sliced fragment. $1144.00 reduced to $1001.00 Allende CV3 6.59 g whole stone $99.00 Tatahouine 2.73 g Contains minor fusion crust. $54.00 Lake Murry Oxide 65.28 g The largest piece of oxide I have ever seen. Was originally given to my friend Frank Frazier by the original finder of the Lake Murry meteorite Allen Graffham. Interesting historical piece. $260.00 Estherville Nugget 8.74 g Awesome whole mesosiderite. $874.00 https://picasaweb.google.com/109538410126952617536/PartSale1?authuser=0authkey=Gv1sRgCL7h5LitksGebQfeat=directlink Mike Mike Jensen Meteorites 16730 E Ada PL Aurora, CO 80017-3137 USA 303-946-1495 IMCA 4264 website: www.jensenmeteorites.com __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Met Bulletin Update - 196 Approvals, NWA, Sahara, Winner South Dakota
Keith and Dana certainly win the prize for best meteorite names recently: Winner and Nothing! Congrats! Mendy Ouzillou From: Carl Agee a...@unm.edu To: Galactic Stone Ironworks meteoritem...@gmail.com Cc: Meteorite List meteorite-list@meteoritecentral.com Sent: Friday, September 27, 2013 12:22 PM Subject: Re: [meteorite-list] Met Bulletin Update - 196 Approvals, NWA, Sahara, Winner South Dakota Hi Mike, Winner is definitely a winner. The write-up does not mention that UNM and ASU both now have full slices of Winner in their collections. Beautiful and unusual OC, South Dakota meteorite! Best regards, Carl * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Fri, Sep 27, 2013 at 1:07 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Bulletin Watchers, 196 new approvals. Most are OC's from the Sahara dense collection area. There are also some NWA's, Nevada, and one find from South Dakota (Winner). Link to all new approvals - http://www.lpi.usra.edu/meteor/metbull.php?sea=sfor=namesants=falls=valids=stype=containslrec=50map=gebrowse=country=Allsrt=namecateg=Allmblist=Allrect=phot=snew=1pnt=Normal%20tabledr=page=1 Link to Winner - http://www.lpi.usra.edu/meteor/metbull.php?code=58292 Best regards and happy huntings, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] New Collection Gallery
Great stuff Matt... Graham On Fri, Sep 27, 2013 at 7:51 PM, Martin Goff msgmeteori...@gmail.com wrote: Nicely done Matt, some amazing and stunning pieces! :-) Cheers Martin On 27 September 2013 17:15, m...@mhmeteorites.com wrote: I have just re-done my meteorite collection gallery. If you are interested, please have a look here: http://milehighmeteorites.zenfolio.com/ It is also linked from my website at http://www.mhmeteorites.com Thanks, Matt Morgan Mile High Meteorites __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Martin Goff www.msg-meteorites.co.uk IMCA #3387 __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Dawn Journal - September 27, 2013
http://dawn.jpl.nasa.gov/mission/journal_09_27_13.asp Dawn Journal Dr. Marc Rayman September 27, 2013 Dear Dawnniversaries, On the sixth anniversary of leaving Earth to embark on a daring deep-space expedition, Dawn is very, very far from its erstwhile planetary residence. Now humankind's only permanent resident of the main asteroid belt between Mars and Jupiter, the seasoned explorer is making good progress toward the largest object in that part of the solar system, the mysterious dwarf planet Ceres. The voyage is long, and the intrepid but patient traveler will not reach its next destination until half a year after its seventh anniversary of departing Earth. On its fifth anniversary, Dawn was still relatively close to Vesta, the giant protoplanet that had so recently held the craft in its gravitational grip. The only probe ever to orbit a main belt asteroid, Dawn spent 14 months (including its fourth anniversary) accompanying Vesta on its way around the sun. After more than two centuries of appearing to astronomers as little more than a fuzzy blob of light among the stars, the second most massive body in the asteroid belt has been revealed as a fascinating, complex, alien world more closely related to terrestrial planets (including Earth) than to typical asteroids. Most of the ship's first four years of spaceflight were devoted to using its ion propulsion system to spiral away from the sun, ascending the solar system hill from Earth to Vesta. Now it is working to climb still higher up that hill to Ceres. For those who would like to track the probe's progress in the same terms used on previous (and, we boldly predict, subsequent) anniversaries, we present here the sixth annual summary, reusing the text from last year with updates where appropriate. Readers who wish to cogitate about the extraordinary nature of this deep-space expedition may find it helpful to compare this material with the logs from its first journal_9_27_08.asp, second journal_9_27_09.asp, third journal_09_27_10.asp, fourth journal_09_27_11.asp, and fifth journal_09_27_12.asp anniversaries. In its six years of interplanetary travels, the spacecraft has thrust for a total of 1,410 days, or 64 percent of the time (and about 0.00028 percent of the time since the Big Bang). While for most spacecraft, firing a thruster to change course is a special event, it is Dawn's wont. All this thrusting has cost the craft only 318 kilograms (701 pounds) of its supply of xenon propellant, which was 425 kilograms (937 pounds) on September 27, 2007. The thrusting so far in the mission has achieved the equivalent of accelerating the probe by 8.7 kilometers per second (19,500 mph). As previous logs have described (see here journal_02_28_13.asp#speed for one of the more extensive discussions), because of the principles of motion for orbital flight, whether around the sun or any other gravitating body, Dawn is not actually traveling this much faster than when it launched. But the effective change in speed remains a useful measure of the effect of any spacecraft's propulsive work. Having accomplished about three-quarters of the thrust time planned for its entire mission, Dawn has already far exceeded the velocity change achieved by any other spacecraft under its own power. journal_06_27_10.asp#resume (For a comparison with probes that enter orbit around Mars, refer to this earlier log journal_12_06.asp#perspective.) Since launch, our readers who have remained on or near Earth have completed six revolutions around the sun, covering about 37.7 AU (5.6 billion kilometers or 3.5 billion miles). Orbiting farther from the sun, and thus moving at a more leisurely pace, Dawn has traveled 27.4 AU (4.1 billion kilometers or 2.5 billion miles). As it climbed away from the sun to match its orbit to that of Vesta, it continued to slow down to Vesta's speed. It will have to slow down still more to rendezvous with Ceres. Since Dawn's launch, Vesta has traveled only 24.2 AU (3.6 billion kilometers or 2.2 billion miles), and the even more sedate Ceres has gone 22.8 AU (3.4 billion kilometers or 2.1 billion miles). Another way to investigate the progress of the mission is to chart how Dawn's orbit around the sun has changed. This discussion will culminate with a few more numbers than we usually include, and readers who prefer not to indulge may skip this material, leaving that much more for the grateful Numerivores. In order to make the table below comprehensible (and to fulfill our commitment of environmental responsibility), we recycle some more text here on the nature of orbits. Orbits are ellipses (like flattened circles, or ovals in which the ends are of equal size). So as members of the solar system family follow their paths around the sun, they sometimes move closer and sometimes move farther from it. In addition to orbits being characterized by shape, or equivalently by the amount of flattening (that is, the deviation from
[meteorite-list] Maui IfA Open House
Aloha meteorite folks, If you are on Maui island in Hawaii, please consider attending the Institute for Astronomy (IfA) Open House in Pukalani, off Haleakala Highway, from 6:00-8:00pm. There will be lots of cool things to see and do, and I will have my meteorites on display there. Hope to see some of you tonight. Sent from Gary's iPhone __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Reports Of Another Indiana Fireball Tonight
Scroll down for the reports: https://www.facebook.com/NewsCenter16 Phil Whitmer Joshua Tree Earth Space Museum __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
