[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: Troup Contributed by: Shawn Alan http://www.tucsonmeteorites.com/mpod.asp __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] NASA's Jupiter-Bound Juno Spacecraft Buzzes Earth Today: Watch It Live
http://www.space.com/23127-juno-jupiter-probe-earth-flyby-webcast.html NASA's Jupiter-Bound Juno Spacecraft Buzzes Earth Today: Watch It Live by Tariq Malik space.com October 9, 2013 A NASA spacecraft will zoom by Earth today (Oct. 9) to use the planet's gravitational pull as a speed boost for its trip to Jupiter and you can see live views of the probe live online during the flyby. NASA's Juno probe will be a mere 347 miles (558 kilometers) from Earth and over South Africa when it makes its closest approach at 3:21 p.m. EDT (1921 GMT). Later tonight, at 9:30 p.m. EDT (0130 GMT), the online Slooh Space Camera will track the Juno spacecraft's Earth flyby live in a free webcast. You can watch the Juno flyby webcast live on SPACE.com, courtesy of Slooh. Viewers can also ask questions via Twitter using the hashtag #nasajuno. Besides watching on Slooh, viewers near Cape Town, South Africa, will have the best opportunity to view the spacecraft traveling across the sky, Slooh officials said. The spacecraft will most likely not be visible to the unaided eye, but binoculars or a small telescope with a wide field should provide an opportunity to view. NASA launched the Juno in August 2011 on a mission to study Jupiter in unprecedented detail when it arrives at the gas giant planet on July 4, 2016. The $1.1 billion Juno mission to Jupiter will use nine instruments to probe deep inside Jupiter to reveal glimpses into the planet's origin, structure, atmosphere and magnetic field. It is named after Juno, the mythological wife of the god Jupiter who used special powers to learn the secrets Jupiter had hidden beneath cloud cover. But first, the Juno spacecraft has to get to Jupiter. NASA used an unmanned Atlas 5 rocket to launch Juno in 2011, but the rocket was not powerful enough to send the spacecraft all the way to Jupiter. Instead, it sent Juno on a looping trajectory that carried it beyond the orbit of Mars and back so it could around Earth today in what scientists call a gravity assist. Juno is currently streaking through the solar system at a speed of 78,000 mph (126,000 km/h), with respect to the sun. During the gravity-assist speed boost, Earth's gravity will cause Juno to accelerate by as it approaches the planet. Once Juno completes the flyby, it will be travelling at about 87,000 mph (140,000 km/h). Juno mission principal investigator Scott Bolton, of the Southwest Research Institute in San Antonio, Texas, has likened the maneuver to a second rocket launch. While 97 percent of NASA is currently on furlough due to the ongoing government shutdown, the agency's Jet Propulsion Laboratory - which manages the Juno mission - remains on duty for now. During Juno's Earth flyby, the spacecraft is expected to test its science instruments and snap photos of Earth and the moon. One of Juno's activities during the Earth flyby will be to make a movie of the Earth-moon system that will be the first to show Earth spinning on its axis from a distance, Bolton said in a statement. The probe will also flex its scientific muscle in other ways. We'll exercise the science instruments, since Juno's instruments will be operating in a magnetospheric environment for the first time, said spacecraft engineer Jeff Lewis, Juno operations lead for spacecraft builder Lockheed Martin Space Systems. The Earth's magnetic field will allow a number of the instruments to be tested. We're also using the flyby of the moon as an opportunity to gauge how the spacecraft operates. Since Juno is a spinning spacecraft, we need to sense the right time to take data as the moon, or Jupiter, passes through the instruments' fields of view. But the star of today's Earth flyby is the gravity assist maneuver itself, scientists said. Juno will be really smoking as it passes Earth at a speed of about 25 miles per second relative to the sun. But it will need every bit of this speed to get to Jupiter for its July 4, 2016 capture into polar orbit about Jupiter, said research scientist Bill Kurth of the University of Iowa, who is the lead investigator for two of Juno's instruments. The first half of its journey has been simply to set up this gravity assist with Earth. Today's Slooh webcast of the Juno flyby of Earth can be tracked directly from the Slooh Space Camera website (http://www.slooh.com) and via the Slooh iPad app. __ 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] Exploring the Solar System in Antarctica
Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Chelyabinsk Meteorites Reveal Evidence of Prehistoric Cosmic Collision
Meteorites from Russian explosion reveal signs of cosmic crashes by Elizabeth Howell Space.com, NBC News http://www.nbcnews.com/science/meteorites-russian-explosion-reveal-signs-cosmic-crashes-8C11358914 http://www.space.com/23112-russian-meteor-explosion-meteorites-cosmic-crashes.html Insights from space rocks left after meteor exploded over Russia, EarthSky , October 8, 2013 http://earthsky.org/space/insights-from-space-rocks-left-after-meteor-exploded-over-russia Russian meteor was partially formed from hard to spot 'dark asteroid' material, The Telegraph, October 9, 2013 http://www.telegraph.co.uk/science/science-news/10366055/Russian-meteor-was-partially-formed-from-hard-to-spot-dark-asteroid-material.html An earlier article is: Russian Meteor Explosion: Space Rock Had Near-Misses Before Impact by C. Moskowitz, SPACE.com, Aug. 26, 2013 ET http://www.space.com/22536-russia-meteor-explosion-chelyabinsk-near-miss.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Exploring the Solar System in Antarctica
It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ 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] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ 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] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ 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] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Northwest Africa 2737, the only other chassignite. * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Oct 9, 2013 at 2:21 PM, Carl Agee a...@unm.edu wrote: Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ 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] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Carl, I'm guessing that the reason for the disparity you speak of below between NWA and Antarctic meteorites is that EVERY antarctic meteorite get collected with no filtering while the NWA meteorites are brought to light by economic drivers. Old, weathered or uninteresting material does not get brought forth because almost no one wants to buy it and fewer still would bother classifying. It is an interesting aspect of the NWA dynamics that has not been explored and a perfect example of the role collectors and dealers play in acting as filters for the scientific community. Best, Mendy On Wednesday, October 9, 2013 1:28 PM, Carl Agee a...@unm.edu wrote: Northwest Africa 2737, the only other chassignite. * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Oct 9, 2013 at 2:21 PM, Carl Agee a...@unm.edu wrote: Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com
Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica)
It is myth that Antarctic meteorites are less weathered. They weather differently is all. I have been in the Antarctic Laboratory and can tell that most of the inventory is not free of rusticles and evaporation deposits. After all, Antarctica gets its weather right of the salt water ocean. It seems only the best looking material is ever put on public display. Adam - Original Message - From: Carl Agee a...@unm.edu To: Galactic Stone Ironworks meteoritem...@gmail.com Cc: Adam Hupe raremeteori...@yahoo.com; Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 1:21 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ 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] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Mendy, Absolutely! I remember the curation folks at NASA JSC describing the mind-numbing ordeal of having to catalog hundreds of EOCs brought back by ANSMET, many of which were of course the same meteorite. 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 Wed, Oct 9, 2013 at 2:41 PM, Mendy Ouzillou ouzil...@yahoo.com wrote: Carl, I'm guessing that the reason for the disparity you speak of below between NWA and Antarctic meteorites is that EVERY antarctic meteorite get collected with no filtering while the NWA meteorites are brought to light by economic drivers. Old, weathered or uninteresting material does not get brought forth because almost no one wants to buy it and fewer still would bother classifying. It is an interesting aspect of the NWA dynamics that has not been explored and a perfect example of the role collectors and dealers play in acting as filters for the scientific community. Best, Mendy On Wednesday, October 9, 2013 1:28 PM, Carl Agee a...@unm.edu wrote: Northwest Africa 2737, the only other chassignite. * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Oct 9, 2013 at 2:21 PM, Carl Agee a...@unm.edu wrote: Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ 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
Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Weathering rates for New Mexico, Sahara, and Antarctica: http://articles.adsabs.harvard.edu/full/1993Metic..28Q.460W * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Oct 9, 2013 at 2:48 PM, Adam Hupe raremeteori...@yahoo.com wrote: It is myth that Antarctic meteorites are less weathered. They weather differently is all. I have been in the Antarctic Laboratory and can tell that most of the inventory is not free of rusticles and evaporation deposits. After all, Antarctica gets its weather right of the salt water ocean. It seems only the best looking material is ever put on public display. Adam - Original Message - From: Carl Agee a...@unm.edu To: Galactic Stone Ironworks meteoritem...@gmail.com Cc: Adam Hupe raremeteori...@yahoo.com; Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 1:21 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at
Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Interesting, Statistics are wonderful when using two different weather grading systems with a limited sampling. I will state that some fantastic meteorites have come out of Antarctica and have certainly been managed better for the most part than their NWA counterparts. On the other hand, by rarity, weight and numbers, NWA is by far in the lead. In the long run, I have always been of the opinion that it doesn't matter where a meteorite lands just so long as ponderable pieces are recovered. The yield of meteorites with great scientific importance has trended greatly towards NWA the last decade. Adam - Original Message - From: Carl Agee a...@unm.edu To: Adam Hupe raremeteori...@yahoo.com Cc: Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 2:13 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Weathering rates for New Mexico, Sahara, and Antarctica: http://articles.adsabs.harvard.edu/full/1993Metic..28Q.460W * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Oct 9, 2013 at 2:48 PM, Adam Hupe raremeteori...@yahoo.com wrote: It is myth that Antarctic meteorites are less weathered. They weather differently is all. I have been in the Antarctic Laboratory and can tell that most of the inventory is not free of rusticles and evaporation deposits. After all, Antarctica gets its weather right of the salt water ocean. It seems only the best looking material is ever put on public display. Adam - Original Message - From: Carl Agee a...@unm.edu To: Galactic Stone Ironworks meteoritem...@gmail.com Cc: Adam Hupe raremeteori...@yahoo.com; Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 1:21 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. 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 - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: It should be changed to A few of the best meteorites are found in Antarctica but these days, most are found in the Sahara Adam - Original Message - From: Paul H. inselb...@cox.net To: meteorite-list@meteoritecentral.com meteorite-list@meteoritecentral.com Cc: Sent: Wednesday, October 9, 2013 11:40 AM Subject: [meteorite-list] Exploring the Solar System in Antarctica Exploring the Solar System From the Ends of the Earth The best meteorites are found in … Antarctica. By Meenakshi Wadhwa, Slate Magazine http://www.slate.com/articles/technology/future_tense/2013/09/the_best_meteorites_are_found_in_antarctica.html Yours, Paul H. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list
Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica)
Hi Adam, Mendy, Carl, List, Mendy raised a good point about filtering by live human beings. In Antarctica, the classification queue is determined largely by mindless geological processes that gather the meteorites and deposit them in large numbers into locations where they are relatively-easy to find. In the NWA dense collection area, the specimens are distributed and found randomly in piecemeal fashion by humans. Those meteorites then pass down the chain of custody from finder to middleman/wholesaler to dealer to final buyer. At any point along that chain, a human may spot something interesting that is then put aside for individual attention. The majority of unremarkable, less-valuable, less-interesting material ends up bypassing the classification process and will remain unclassified (obvious H5 W4 material, etc). I don't feel particularly offended when such bottom-feeder common material ends up being used for jewelry and trinkets - at least somebody is enhancing it's value/interest in some way - if that material hasn't clogged up the classification system before it gets to the end buyer. The end result is that keen, experienced eyes will bring the best material to the classification queue. Because of NWA, Vestans are no longer rare. Remember when a howardite was a big deal? Now they scarcely fetch more than a handful of dollars per gram and collectors can choose from many dozens of them. I think every institution that needs howardite for study, must surely have plenty of it by now. The big difference is for collectors. Most collectors will never hold (much less own) the majority of meteorites from Antarctica - they are unobtainable, save for a few exceptions. Collectors get to look at pictures and read the papers about ANSMET meteorites, but we will never own any of them, nor see them in-hand. NWA is an entirely different story. Best regards, MikeG -- - Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone - On 10/9/13, Adam Hupe raremeteori...@yahoo.com wrote: Interesting, Statistics are wonderful when using two different weather grading systems with a limited sampling. I will state that some fantastic meteorites have come out of Antarctica and have certainly been managed better for the most part than their NWA counterparts. On the other hand, by rarity, weight and numbers, NWA is by far in the lead. In the long run, I have always been of the opinion that it doesn't matter where a meteorite lands just so long as ponderable pieces are recovered. The yield of meteorites with great scientific importance has trended greatly towards NWA the last decade. Adam - Original Message - From: Carl Agee a...@unm.edu To: Adam Hupe raremeteori...@yahoo.com Cc: Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 2:13 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Weathering rates for New Mexico, Sahara, and Antarctica: http://articles.adsabs.harvard.edu/full/1993Metic..28Q.460W * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Oct 9, 2013 at 2:48 PM, Adam Hupe raremeteori...@yahoo.com wrote: It is myth that Antarctic meteorites are less weathered. They weather differently is all. I have been in the Antarctic Laboratory and can tell that most of the inventory is not free of rusticles and evaporation deposits. After all, Antarctica gets its weather right of the salt water ocean. It seems only the best looking material is ever put on public display. Adam - Original Message - From: Carl Agee a...@unm.edu To: Galactic Stone Ironworks meteoritem...@gmail.com Cc: Adam Hupe raremeteori...@yahoo.com; Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 1:21 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! Carl * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences
[meteorite-list] Charles Burney Jr. and the term 'asteroid'
Dear list members, this sounds interesting: Greek scholar invented the term asteroid, researcher reveals http://www.lodinews.com/ap/nation/article_3c86d500-3070-11e3-9637-10604b9f0f42.html Best regards Martin Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ 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] Charles Burney Jr. and the term 'asteroid'
The article concludes that asteroid is the right word for these objects. The term is certainly familiar and entrenched, but it means star-like and is appropriate only to the appearance of these objects in a small telescope. Other terms that have been used frequently are minor planet and planetoid. These may be more accurate, but are certainly not euphonious. And we now have one asteroid, Ceres, that is also a dwarf planet. Vermin of the skies has a nice ring to it, but what would we call the asteroid belt -- zone of sky vermin? I think we're stuck with asteroid, but must not forget that the term also refers to starfish (which are, of course, echinoderms from the class Asteroidea). Alan Rubin Institute of Geophysics and Planetary Physics University of California 3845 Slichter Hall 603 Charles Young Dr. E Los Angeles, CA 90095-1567 phone: 310-825-3202 e-mail: aeru...@ucla.edu website: http://cosmochemists.igpp.ucla.edu/Rubin.html - Original Message - From: karmaka karmaka-meteori...@t-online.de To: met-list meteorite-list@meteoritecentral.com Sent: Wednesday, October 09, 2013 3:31 PM Subject: [meteorite-list] Charles Burney Jr. and the term 'asteroid' Dear list members, this sounds interesting: Greek scholar invented the term asteroid, researcher reveals http://www.lodinews.com/ap/nation/article_3c86d500-3070-11e3-9637-10604b9f0f42.html Best regards Martin Postfach fast voll? Jetzt kostenlos E-Mail Adresse @t-online.de sichern und endlich Platz für tausende Mails haben. http://www.t-online.de/email-kostenlos __ 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] Exploring the Solar System in Antarctica (NWA vs Antarctica)
As I've pointed out a number of times before, the scientific impact of past research on Antarctic meteorites vastly outweighs that of work on Saharan and other warm-desert meteorites. The reasons for this are historical and curatorial. And as a person who has done a lot of research on chondrites from both places, I can say from long experience that the degree of weathering in Antarctic specimens is, overall, much less. Work on warm desert meteorites is growing in importance, that's certain. This is especially true in terms of work on unique or unusual specimens, like NWA 7034, which are more plentiful in hot desert collections. But when most scientists want to do systematic studies, the first stops are still very likely to be collections of observed falls and Antarctic meteorites. So I guess it boils down to the meaning of best. For collectors, it's no contest, since you cannot privately own most Antarctics. For Science, with a capital S, Antarctics have generally been best, although some like Carl, are doing great work on special hot desert finds. My take. Jeff On 10/9/2013 5:29 PM, Adam Hupe wrote: Interesting, Statistics are wonderful when using two different weather grading systems with a limited sampling. I will state that some fantastic meteorites have come out of Antarctica and have certainly been managed better for the most part than their NWA counterparts. On the other hand, by rarity, weight and numbers, NWA is by far in the lead. In the long run, I have always been of the opinion that it doesn't matter where a meteorite lands just so long as ponderable pieces are recovered. The yield of meteorites with great scientific importance has trended greatly towards NWA the last decade. Adam - Original Message - From: Carl Agee a...@unm.edu To: Adam Hupe raremeteori...@yahoo.com Cc: Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 2:13 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Weathering rates for New Mexico, Sahara, and Antarctica: http://articles.adsabs.harvard.edu/full/1993Metic..28Q.460W * Carl B. Agee Director and Curator, Institute of Meteoritics Professor, Earth and Planetary Sciences MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 Tel: (505) 750-7172 Fax: (505) 277-3577 Email: a...@unm.edu http://meteorite.unm.edu/people/carl_agee/ On Wed, Oct 9, 2013 at 2:48 PM, Adam Hupe raremeteori...@yahoo.com wrote: It is myth that Antarctic meteorites are less weathered. They weather differently is all. I have been in the Antarctic Laboratory and can tell that most of the inventory is not free of rusticles and evaporation deposits. After all, Antarctica gets its weather right of the salt water ocean. It seems only the best looking material is ever put on public display. Adam - Original Message - From: Carl Agee a...@unm.edu To: Galactic Stone Ironworks meteoritem...@gmail.com Cc: Adam Hupe raremeteori...@yahoo.com; Adam meteorite-list@meteoritecentral.com Sent: Wednesday, October 9, 2013 1:21 PM Subject: Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica) Hi Mike, Add to that list NWA 7731 (L3.00). Semarkona (LL3.00) may still be King, but 7731 is certainly a Prince! The only thing that Antarctic finds have going for them is that weathering is much slower there than in North Africa, so fresher material in general. But if I look at the ANSMET annual yield of exceptional meteorites it is paltry compared to NWA. For planetaries over the past ten years or so, NWA is definitely King! 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 Wed, Oct 9, 2013 at 1:45 PM, Galactic Stone Ironworks meteoritem...@gmail.com wrote: Hi Adam and List, Not taking into account old Saharan meteorites (like Nakhla and Tatahouine), here is a list of some recent meteorites from the Sahara that hold significant scientific and/or collector interest : Black Beauty (NWA 7034) Tissint Jbilet Winselwan NWA 5000 NWA 998 Almahata Sitta NWA 4301 Zag Gebel Kamil Too many Vestans to list. I threw together this list on the fly and in an arbitrary fashion. The true number of Saharan meteorites valuable to science is subject to interpretation, but it surely numbers in the many hundreds. Granted, many NWA's are weathered and redundant, highly-equilibrated, ordinary chondrites. But, many Antarctics are sub-gram fragments of paired finds. So I think the signal-to-noise ratio of NWA's versus Antarctics is about even. Best regards and happy huntings, MikeG -- - Web -
[meteorite-list] Juno Is In Safe Mode, But Okay and On Course Following Earth Flyby
http://www.planetary.org/blogs/emily-lakdawalla/2013/10091550-juno-safe-mode.html Juno is in safe mode, but okay and on course following Earth flyby By Emily Lakdawalla Planetary Society Blog October 9, 2013 Following its Earth flyby earlier today, Juno is in safe mode. This is the protective state a spacecraft goes into when it detects a problem. But everything is okay. For more details, I just spoke with Rick Nybakken, Juno Project Manager at the Jet Propulsion Laboratory. For a bit of background: as Juno flew past Earth, it spent some time in Earth's shadow, that is, in eclipse. Nybakken told me that Juno entered eclipse in a nominal state, and came out of eclipse in safe mode. He said they have established communications with the vehicle, and that they have full commandability, and that they are in a safe, stable state. They don't know what caused the safe mode yet; they have to analyze the telemetry further. The gravity-assist flyby was a totally passive event in terms of propulsion for the spacecraft, so the safe mode has no effect whatsoever on Juno's planned trajectory; it's on its way to Jupiter. Nybakken told me they hit the target within 2 kilometers. I asked him if he knows if the planned Earth imaging took place. He said they don't know yet, as they're still analyzing the telemetry they're getting from the spacecraft; he said he hoped they'd know tonight or early tomorrow morning. I will update you all as I learn more. Safe modes during gravity assists are not unheard of -- because it's a passive event, they don't disable fault protection as they would for, say, an orbit insertion burn. And a gravity assist flyby is a highly unusual event for a spacecraft. It'd be nice if it hadn't happened, but not a great concern that it did, and Nybakken sounded calm. Launching from Earth in 2011, the Juno spacecraft will arrive at Jupiter in 2016 to study the giant planet from an elliptical, polar orbit. Juno will repeatedly dive between the planet and its intense belts of charged particle radiation, coming only 5,000 kilometers from the cloud tops at closest approach. __ 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] Juno Goes Into Safe Mode During Earth Flyby
http://spaceflightnow.com/juno/131009safemode/ Juno goes into safe mode during Earth flyby BY STEPHEN CLARK SPACEFLIGHT NOW October 9, 2013 NASA's Juno spacecraft went into safe mode Wednesday as it flew by Earth to gain speed on its five-year journey to Jupiter, but the mission's lead scientist said the flyby achieved its objective of putting the probe on the correct course toward the solar system's largest planet. The Jupiter-bound probe flew about 350 miles over the Indian Ocean near South Africa at 3:21 p.m. EDT (1921 GMT), and all data indicate the spacecraft obtained the predicted gravity boost from the flyby, according to Scott Bolton, Juno's principal investigator from the Southwest Research Institute in San Antonio. But the spacecraft, stretching the size of a basketball court with its solar panels extended, experienced a fault some time during the flyby, going into a safe mode to protect the probe's systems and instruments while engineers on the ground scramble to diagnose the problem. Bolton said Juno is designed to downlink data at a slower rate than normal during a safe mode, but telemetry from the spacecraft shows all its systems and instruments are fine. The solar-powered spacecraft zoomed over the Indian Ocean on the night side of the Earth, putting the probe's expansive solar arrays in eclipse for the first time since its launch in August 2011. Juno also passed out of range of ground antennas around the time of closest approach, and a European Space Agency ground station in Perth, Australia, acquired the first radio signals from Juno a few minutes later. When we came out of the eclipse, we realized that the spacecraft was in safe mode, Bolton said. What we do know is that all the subsystems and instruments are nominal and behaving OK. Juno was programmed to collect data during the flyby with its science payload. The research activities - considered a bonus by the Juno science team - included gathering observations of the Earth's magnetic field and auroras and snapping a series of images of Earth with the spacecraft's primary camera. This did not affect the main purpose of the flyby, which was to put Juno on the right course to Jupiter, Bolton said. Bolton said ground controllers see some indications Juno gathered data and images during the flyby, but it may take more time to confirm whether the craft took the images as planned. If the imagery was collected, it could take extra time recover the information from the probe's on-board computer while engineers focus their work on putting Juno back into its normal operating mode. Juno is set to arrive in orbit around Jupiter on July 4, 2016, beginning a one-year science mission studying the gas giant's crushing atmosphere, powerful magnetic field and enigmatic core. Juno's discoveries could help scientists unravel how Jupiter, likely the solar system's oldest planet, formed and evolved in the early solar system. __ 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] NEOWISE Telescope Cooling Off To Find Asteroids Near Earth
http://www.spaceflightnow.com/news/n1310/09neowise/ Orbiting telescope cooling off to find asteroids near Earth BY STEPHEN CLARK SPACEFLIGHT NOW October 9, 2013 Approved for an extended mission in August, NASA has reactivated the orbiting NEOWISE mission from hibernation, and the telescope's infrared detectors are cooling off to undertake a renewed survey for asteroids coming perilously close to Earth, the project's top scientist said Tuesday. The electronic eyes inside the Wide-field Infrared Survey Explorer can only detect infrared light from cold asteroids when the detectors are chilled to frigid temperatures as low as minus 325 degrees Fahrenheit. Amy Mainzer, principal investigator of the NEOWISE extended mission, said ground controllers have established communications with the WISE spacecraft. Engineers pointed the telescope away from Earth toward the cold darkness of deep space on Oct. 3, beginning a three-to-four-month chill down. Since WISE was put in hibernation in 2011, the satellite was pointing its 16-inch telescope toward Earth for half of each 300-mile-high orbit, warming up the mission's sensitive instrumentation. We're now radiatively cooling, Mainzer said Tuesday in a press conference at the American Astronomical Society's 45th annual Division for Planetary Sciences meeting in Denver. We expect to basically reverse this process. Mainzer said it would take several months to reach a stable operating temperature of about minus 325 degrees Fahrenheit, with science observations due to resume by the beginning of 2014. NASA awarded the NEOWISE team $5 million annually over the next three years to scan the inner solar system for near-Earth objects, including rocks which pose a potential hazard to Earth. We'll be discovering, we think, about 150 new objects over a three-year survey, Mainzer said. Most of the objects discovered by NEOWISE will be larger than the targets proposed for NASA's asteroid retrieval mission concept, which calls for the launch of an unmanned probe to capture a small asteroid approximately 7 meters, or 23 feet, across and tug it back to a stable position near the moon. Astronauts aboard an Orion spacecraft would blast off, perhaps as early as 2021, and rendezvous with the asteroid for research and spacewalks to gather samples. Mainzer said the NEOWISE extension is not directly affiliated with the asteroid retrieval mission. The WISE spacecraft was not tailored for asteroid hunting, and the modest rocks sought by NASA's asteroid retrieval mission are tough to find, according to Mainzer, but it's quite likely NEOWISE will find a few. These objects are very difficult to get at for a number of reasons, Mainzer said. For one thing, they're just intrinsically very faint. The smallest rock spotted by NEOWISE three years ago was about 8 meters, or 26 feet, in diameter. It's clear we have a lot of work to do to characterize the small end of the near-Earth object population, Mainzer said. Ground telescopes and future space-based missions may have a better chance of scouring the sky for small asteroids, Mainzer said. We are keen to find objects that are the most accessible because we think that would support a wide variety of missions, Mainzer said. NEOWISE's infrared data will also yield key data on the size and reflectivity of many more objects, including asteroids already discovered by the telescope's first round of observations in 2010 and 2011. Mainzer said NEOWISE will look at a few thousand near-Earth objects over the three-year extended mission. It's going to enable quite a lot of science, Mainzer said, adding NEOWISE would also be observing nearby brown dwarfs and variable stars in two infrared wavelengths - 3.4 and 4.6 microns. The mission will end in 2017 when the natural shifting of the satellite's orbital plane around Earth puts the sun in the telescope's field-of-view. By early 2017, we won't be able to keep the sun out of the baffle effectively, and that's going to end the mission, Mainzer said. WISE discovered more than 34,000 asteroids in the main belt between Mars and Jupiter, 135 near-Earth objects and 21 comets during its initial observing campaign in 2010 and 2011, according to a NASA press release. __ 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] Juno Goes Into Safe Mode During Earth Flyby
Hello Ron, Maybe it was all of us RFing the poo out of her radios at 200-1500 watts over on 10meters [as requested]? :) I was monitoring the entire 1Mhz spectrum width from another location as I was hitting her, and I counted at least six, sometimes eight, other stations mashing the key at the same time I was, and that's just what was in view of my remote receiver down in the valley hole! --- Jodie Wednesday, October 9, 2013, 4:47:23 PM, you wrote: http://spaceflightnow.com/juno/131009safemode/ Juno goes into safe mode during Earth flyby BY STEPHEN CLARK SPACEFLIGHT NOW October 9, 2013 NASA's Juno spacecraft went into safe mode Wednesday as it flew by Earth to gain speed on its five-year journey to Jupiter, but the mission's lead scientist said the flyby achieved its objective of putting the probe on the correct course toward the solar system's largest planet. The Jupiter-bound probe flew about 350 miles over the Indian Ocean near South Africa at 3:21 p.m. EDT (1921 GMT), and all data indicate the spacecraft obtained the predicted gravity boost from the flyby, according to Scott Bolton, Juno's principal investigator from the Southwest Research Institute in San Antonio. But the spacecraft, stretching the size of a basketball court with its solar panels extended, experienced a fault some time during the flyby, going into a safe mode to protect the probe's systems and instruments while engineers on the ground scramble to diagnose the problem. Bolton said Juno is designed to downlink data at a slower rate than normal during a safe mode, but telemetry from the spacecraft shows all its systems and instruments are fine. The solar-powered spacecraft zoomed over the Indian Ocean on the night side of the Earth, putting the probe's expansive solar arrays in eclipse for the first time since its launch in August 2011. Juno also passed out of range of ground antennas around the time of closest approach, and a European Space Agency ground station in Perth, Australia, acquired the first radio signals from Juno a few minutes later. When we came out of the eclipse, we realized that the spacecraft was in safe mode, Bolton said. What we do know is that all the subsystems and instruments are nominal and behaving OK. Juno was programmed to collect data during the flyby with its science payload. The research activities - considered a bonus by the Juno science team - included gathering observations of the Earth's magnetic field and auroras and snapping a series of images of Earth with the spacecraft's primary camera. This did not affect the main purpose of the flyby, which was to put Juno on the right course to Jupiter, Bolton said. Bolton said ground controllers see some indications Juno gathered data and images during the flyby, but it may take more time to confirm whether the craft took the images as planned. If the imagery was collected, it could take extra time recover the information from the probe's on-board computer while engineers focus their work on putting Juno back into its normal operating mode. Juno is set to arrive in orbit around Jupiter on July 4, 2016, beginning a one-year science mission studying the gas giant's crushing atmosphere, powerful magnetic field and enigmatic core. Juno's discoveries could help scientists unravel how Jupiter, likely the solar system's oldest planet, formed and evolved in the early solar system. __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list -- Best regards, Jodiemailto:spacero...@spaceballoon.org __ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Exploring the Solar System in Antarctica (NWA vs Antarctica)
I will not debate the legacy of Antarctic meteorites. They have had a wonderful history and their contribution to science has been invaluable. Most researchers are sample oriented and are not biased by find location but there are still a few that cling to legacy. Antarctica had a a two decade plus head start in the abstract/paper queue so naturally there are more documents. Ten years ago, maybe one in ten papers were on hot desert finds. Now, I estimate about 50%. At this rate, as very important samples from NWA and other deserts enter the queue, it will not be long before these finds handily overtake Antarctica by a wide margin in the business of science. In other words; There is not enough material coming out of Antarctica anymore to reverse the current trend which favors the hot desert meteorites for research material in the future. Adam __ 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
