Re: [meteorite-list] Portales Valley: Not Just Another Ordinary Chondrite
ok...in conclusion what new classification is portales valley? Matteo --- Ron Baalke <[EMAIL PROTECTED]> ha scritto: > > http://www.psrd.hawaii.edu/Sept05/PortalesValley.html > > Portales Valley: Not Just Another Ordinary Chondrite > Planetary Science Research Discoveries > September 30, 2005 > > --- A melted meteorite gives a snapshot of the heat > and shock that > wracked an asteroid during the first stages of > differentiation. > > Written by Alex Ruzicka and Melinda Hutson > Department of Geology, Portland State University > > Soon after the Portales Valley meteorite fell in > 1998, it was classified > as one of the most common types of meteorites, an H6 > ordinary chondrite. > Although researchers quickly recognized that > Portales Valley is not a > typical H6 chondrite, there was little agreement > about how the meteorite > formed. A recent study of Portales Valley by Ruzicka > and colleagues > suggests that the textures, mineralogy, and > chemistry of the meteorite > are best explained as the first good example of a > metallic melt breccia. > This meteorite represents a transitional stage > between chondrites and > various classes of differentiated meteorites, and > offers clues as to > how differentiation occurred in early-formed > planetary bodies. > > Reference: > > * Ruzicka, A., Killgore, M., Mittlefehldt, D.W. > and Fries, M.D > (2005) Portales Valley: Petrology of a > metallic-melt meteorite > breccia. Meteoritics & Planetary Science, v. 40, p. > 261-295. > > > > Differentiation: a widespread but poorly-understood > process > > Most solar system material underwent > differentiation, a process > involving melting and separation of liquids and > solids of varying > density and chemical composition. However, > chondritic meteorites escaped > this process and are believed to be pieces of > undifferentiated > asteroids. All other meteorites, and probably all > rocks from planets and > large moons, melted when the parent bodies > differentiated to form cores, > mantles, and crusts. The heat source for > differentiation is uncertain, > as are the exact physical processes and conditions > that allowed > differentiation to proceed in small planetary bodies > with weak gravity. > Proposed sources of heat include > internally-generated heat from > short-lived radioactive materials such as > aluminum-26 (26Al), external > heating from our young active Sun, and heating > resulting from collisions > between planetary bodies (shock heating). A detailed > study of the > Portales Valley meteorite suggests that > differentiation of small > planetary bodies involved a combination of an > internal heat source and > shock. Shock heating was not the major heat source > involved in > differentiation, but the stress waves associated > with even modest shock > events played a critical role in helping materials > to separate and > reconfigure during differentiation. > > illustration of differentiation by Granshaw > > A sequence of images showing stages in the > differentiation of a > planetesimal, an early-formed planetary body. The > image in the left hand > side shows a chondritic planetesimal becoming hot > enough for melting to > begin. The middle image shows that the heavier > metallic liquid sinks > toward the center, while the less dense rocky > material rises toward the > surface. The result is a differentiated object with > a crust, mantle and > core, as shown in the image in the right hand side. > (Images created by > Frank Granshaw of Artemis Software for the Cascadia > Meteorite > Laboratory, Portland State University.) > > > > Not an ordinary H6 ordinary chondrite > > Three features link Portales Valley to H-group > ordinary chondrites. > These are (1) the presence of rare chondrules with a > rather typical > chondritic texture present in silicate-rich areas, > (2) the compositions > of most minerals, and (3) the > bulk oxygen isotopic composition of the meteorite. > Nonetheless, Portales > Valley contains unusual features that distinguish it > from any other > ordinary chondrite. Even in a cut section, the > differences between > Portales Valley and a typical H-chondrite are > readily apparent (see > figures below). > > comparison to H chondrite > > A comparison of a typical H-chondrite and Portales > Valley. Bright areas > are mainly metallic; dark areas are mainly > silicates. Left: A slice of a > meteorite that is paired with the Franconia (H5) > chondritic meteorite. > The small lines on the ruler are one millimeter > apart. Right: A slice of > the Portales Valley meteorite showing that the > chondritic, silicate-rich > material occurs as angular clasts floating in > metallic veins. Tiny > bright spots in silicate-rich clasts consist of > troilite (FeS) and > smaller amounts of fine-grained metal. A large > graphite
[meteorite-list] Portales Valley: Not Just Another Ordinary Chondrite
http://www.psrd.hawaii.edu/Sept05/PortalesValley.html Portales Valley: Not Just Another Ordinary Chondrite Planetary Science Research Discoveries September 30, 2005 --- A melted meteorite gives a snapshot of the heat and shock that wracked an asteroid during the first stages of differentiation. Written by Alex Ruzicka and Melinda Hutson Department of Geology, Portland State University Soon after the Portales Valley meteorite fell in 1998, it was classified as one of the most common types of meteorites, an H6 ordinary chondrite. Although researchers quickly recognized that Portales Valley is not a typical H6 chondrite, there was little agreement about how the meteorite formed. A recent study of Portales Valley by Ruzicka and colleagues suggests that the textures, mineralogy, and chemistry of the meteorite are best explained as the first good example of a metallic melt breccia. This meteorite represents a transitional stage between chondrites and various classes of differentiated meteorites, and offers clues as to how differentiation occurred in early-formed planetary bodies. Reference: * Ruzicka, A., Killgore, M., Mittlefehldt, D.W. and Fries, M.D (2005) Portales Valley: Petrology of a metallic-melt meteorite breccia. Meteoritics & Planetary Science, v. 40, p. 261-295. Differentiation: a widespread but poorly-understood process Most solar system material underwent differentiation, a process involving melting and separation of liquids and solids of varying density and chemical composition. However, chondritic meteorites escaped this process and are believed to be pieces of undifferentiated asteroids. All other meteorites, and probably all rocks from planets and large moons, melted when the parent bodies differentiated to form cores, mantles, and crusts. The heat source for differentiation is uncertain, as are the exact physical processes and conditions that allowed differentiation to proceed in small planetary bodies with weak gravity. Proposed sources of heat include internally-generated heat from short-lived radioactive materials such as aluminum-26 (26Al), external heating from our young active Sun, and heating resulting from collisions between planetary bodies (shock heating). A detailed study of the Portales Valley meteorite suggests that differentiation of small planetary bodies involved a combination of an internal heat source and shock. Shock heating was not the major heat source involved in differentiation, but the stress waves associated with even modest shock events played a critical role in helping materials to separate and reconfigure during differentiation. illustration of differentiation by Granshaw A sequence of images showing stages in the differentiation of a planetesimal, an early-formed planetary body. The image in the left hand side shows a chondritic planetesimal becoming hot enough for melting to begin. The middle image shows that the heavier metallic liquid sinks toward the center, while the less dense rocky material rises toward the surface. The result is a differentiated object with a crust, mantle and core, as shown in the image in the right hand side. (Images created by Frank Granshaw of Artemis Software for the Cascadia Meteorite Laboratory, Portland State University.) Not an ordinary H6 ordinary chondrite Three features link Portales Valley to H-group ordinary chondrites. These are (1) the presence of rare chondrules with a rather typical chondritic texture present in silicate-rich areas, (2) the compositions of most minerals, and (3) the bulk oxygen isotopic composition of the meteorite. Nonetheless, Portales Valley contains unusual features that distinguish it from any other ordinary chondrite. Even in a cut section, the differences between Portales Valley and a typical H-chondrite are readily apparent (see figures below). comparison to H chondrite A comparison of a typical H-chondrite and Portales Valley. Bright areas are mainly metallic; dark areas are mainly silicates. Left: A slice of a meteorite that is paired with the Franconia (H5) chondritic meteorite. The small lines on the ruler are one millimeter apart. Right: A slice of the Portales Valley meteorite showing that the chondritic, silicate-rich material occurs as angular clasts floating in metallic veins. Tiny bright spots in silicate-rich clasts consist of troilite (FeS) and smaller amounts of fine-grained metal. A large graphite nodule is visible. Besides the obvious differences between Portales Valley and a typical H chondrite, Portales Valley is also unusual in several other ways. It is the only known ordinary chondrite that contains coarse (cm-sized) graphite nodules as well as metal that shows a Widmanstätten texture (an intergrowth of high- and low-Ni metal, see left image below), both of which are common in iron meteorites. Anot
[meteorite-list] AD - Mundrabilla auctions ending on Ebay
Hi Folks, I have three Mundrabilla auctions that I've just listed on eBay. Mundrabilla Meteorite - 41.7g Individual: MA.CS.05.0019 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6567163840 Sculptured Mundrabilla Meteorite - 78.1g: MA.CS.05.0020 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6567163492 SCULPTURED Mundrabilla Meteorite - 98.7g: MA.CS.05.0021 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6567163212 Thanks, Jeff Kuyken I.M.C.A. #3085 www.meteorites.com.au __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Hayabusa Update - October 4, 2005
http://www.isas.ac.jp/e/snews/2005/1004.shtml Current Status of Hayabusa Spacecraft Japan Aerospace Exploration Agency (JAXA) October 4, 2005 Excerpts: o On September 30th, Hayabusa descended to the distance of 6.8 km, Home Position, and entered into a new flight phase. o On that day, Hayabusa fired its RCS engines about 5cm/second to raise the altitude again to keep its relative position within a certain control box. o Hayabusa will make higher latitude imaging as well as inspection of touching-down candidate points for a month. o Every scientific instrument functions normally. Current status of Spacecraft o As already reported, Hayabusa lost one reaction wheel (X-axis) on July 31st and has taken an alternate flight mode using two wheels for attitude stabilization. o On October 3rd, another Y-axis reaction wheel was found not functioning. The incident occurred at 23:08 JST on Oct. 2nd, while it is not operated from Japan. On the malfunction of Y-axis wheel o When the incident occurred, Hayabusa was under the autonomous asteroid tracking mode. The task was with no trouble compensated by RCS (chemical engines) and the observation has been maintained. o Currently, Hayabusa continues the attitude stabilization using one wheel plus two RCS engines. And subsequent observation plan is studied after adequate amount of information is gathered. o Note, Z-axis wheel has not problem from launch and in good health. Affect to Further Hayabusa Flight Activity o Still under detailed study o Fortunately, global mapping is almost completed. o In terms of guidance and navigation, Hayabusa uses radio measurements, and no problem is foreseen. o Operation team is analyzing how to reduce fuel comsumption for attitude stabilization. o Activity plan will be updated and reported, as soon as the strategy is fixed. Flight Schedule Ahead o In the middle of October, high latitude observation and landing site inspection are planned o In November, a rehearsal and two touching-down samplings are performed. o At the beginnig of December, Hayabusa departs for Earth, returning samples of Itokawa in June of 2007. __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re2: correction Tibetan tektite "NOT!!!" on ebayOT: please delete if N/A
Slag or obsidian? Regards Pete Dippl Kapunda South Oz - Original Message - From: "Darren Garrison" <[EMAIL PROTECTED]> To: Sent: Wednesday, October 05, 2005 8:31 AM Subject: Re: [meteorite-list] Re2: correction Tibetan tektite "NOT!!!" on ebayOT: please delete if N/A On Tue, 4 Oct 2005 14:19:00 -0700 (PDT), drtanuki <[EMAIL PROTECTED]> wrote: Sorry about the misinformation about the search; search only "tektite", sale ends in 2 days 11 hours or so. I cannot attach a link because of this Japanese software (I don`t know how to use it). The tektite in Here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6566116443 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Re2: correction Tibetan tektite "NOT!!!" on ebay OT: please delete if N/A
On Tue, 4 Oct 2005 14:19:00 -0700 (PDT), drtanuki <[EMAIL PROTECTED]> wrote: >Sorry about the misinformation about the search; >search only "tektite", sale ends in 2 days 11 hours or >so. I cannot attach a link because of this Japanese >software (I don`t know how to use it). The tektite in Here: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6566116443 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] david hardy?
yo, 'cuz... lost yer email. i will be gradually switching over to yahoo mail (it has 100 FREE megs of storage). please cc to: [EMAIL PROTECTED] __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Re2: correction Tibetan tektite "NOT!!!" on ebay OT: please delete if N/A
Sorry about the misinformation about the search; search only "tektite", sale ends in 2 days 11 hours or so. I cannot attach a link because of this Japanese software (I don`t know how to use it). The tektite in question is labeled as a 3.5 pound tektite found in the Himalayas of Tibet, ex-police department sale. Anyone missing a rock (maybe a 3.5 pound tektite)? Dirk Ross...Tokyo --- drtanuki <[EMAIL PROTECTED]> wrote: > Dear list, > For those interested in seeing something offered > as > a "Tibetan" tektite do an ebay search for "Tibetan > tektite" and you will find something strange offered > for sale; the auction ends in 2 days. > I guess there is a sucker born everyday. No I did > not contact the seller. > Thank you, Dirk Ross...Tokyo > __ > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Tibetan tektite "NOT!!!" on ebay OT: please delete if N/A
Dear list, For those interested in seeing something offered as a "Tibetan" tektite do an ebay search for "Tibetan tektite" and you will find something strange offered for sale; the auction ends in 2 days. I guess there is a sucker born everyday. No I did not contact the seller. Thank you, Dirk Ross...Tokyo __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Ad-Announcing NEA 002, a Uniquely Structured NEW IID Anom. Iron!
Hello everyone. We very pleased to announce NEA 002 (prov.)- a unique new Iron from north east Africa! This iron has been provisionally classified as a very unusual anomalous IID. It has a fractal like etch pattern like nothing you have ever seen before, and you've really got to see it to appreciate it. We have listed several slices and part slices on the website. Enjoy! -John & Dawn Arizona Skies Meteorites http://www.arizonaskiesmeteorites.com Arizona Skies Meteorites __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Ad - Auctions Ending, Nice Stuff, Bargains!
Dear List, Please take the time to look over some great items for both raremeteorites and nature-quest-international that are running on ebay this week. I do not believe in double-dipping so have only been running one ad per week as stated by the Meteorite Central List rules. Nature Quest's mail program will not allow the turning off of HTML so they cannot post to the List at this time. They are in the process of getting a better mail program. In the meantime, I will provide links to their auctions since I am involved with marketing. Several excellent bargains are to be had because many items are still just at 99 cents so check them out if you have the time. Some highlights from raremeteorites A 99.8% crusted Bensour, One of the best I have seen in a long time: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6565519917 New Orleans fragment: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6565522144 A Sikhote Alin with giant 6mm crater, the largest I have ever seen: http://cgi.ebay.com/Excellent-Example-Sikhote-Alin-Meteorite-with-Crater_W0QQitemZ6565562295QQcategoryZ3239QQrdZ1QQcmdZViewItem And several other great raremeteorites auctions can be found at this link: http://search.ebay.com/_W0QQsassZraremeteorites And don't forget Nature Quest International's auctions with great examples of oriented and holed specimens: A Sikhote Alin "Rocket" with 360 degree flow-lines: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6567047639 A Sikhote Alin with a big hole: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6567046848 An oriented Taza that looks like flames are coming off the nose, the best I have seen: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6567049018 And several other outstanding Nature Quest International items can be found at this link: http://search.ebay.com/_W0QQsassZnature-quest-internationalQQhtZ-1 Thank you for looking and if you are bidding, the best of luck! Take Care, Adam Hupe The Hupe Collection Team LunarRock IMCA 2185 [EMAIL PROTECTED] __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Arctic Ice Microbes Suggest Mars Could Also Have Life
http://breakingnews.iol.ie/news/story.asp?j=158014802&p=y58xy55x8 Arctic ice microbes suggest Mars could also have life Ireland On-Line October 4, 2005 Living microbes found in what could be 1 million-year-old ice on a remote Arctic island support a theory the frozen planet Mars could also sustain life, researchers said today. An international team drilled ice core samples on the remote Svalbard islands at the extinct Sverrefjell volcano. They said that was the only place on Earth with the same minerals - called magnetite crystals - as those found on a meteorite from Mars that was discovered in the Antarctic in 1996. "We have discovered a microbiological oasis in natural tubes of blue ice on Svalbard. This is an extremely tough environment in which we would not have expected to find life," said team leader Hans Amundsen, of the University of Oslo. Space probes sent to Mars by Nasa from the United States and by the European Space Administration have showed evidence of water in the form of ice on the Red Planet. Water is a key building block for living organisms, although many scientists believe the planet is now too cold to sustain life, a theory the Norwegian-led team's findings could challenge. Mars is cold and dry with large caps of frozen water at its poles. However, it shares features with the Arctic Svalbard archipelago, such as permafrost, volcanoes and possibly hot springs pushing water through the frozen surface, the team said. The team, called the Arctic Mars Analog Svalbard Expedition, began probing the islands in 2003, taking core samples at sites that include the ice-filled volcanic tubes of the Sverrefjell, which erupted through thick ice about 1 million years ago. "Such ice-filled volcanic tubes are probably also found on Mars, and could be a refuge for life there," said the team's scientific leader, Andrew Steele, of the Carnegie Institution in Washington. The Svalbard Islands are about 300 miles north of the Norwegian mainland, and are largely covered with glaciers and permafrost. The team took core samples with specially designed sterile drills, to avoid contamination by surface bacteria, a statement said. The living microbes were detected in the ice by special biological sensors, developed by Nasa's Jet Propulsion Laboratory. Steele's team then used a series of instruments to determine the number and type of microbes, partly by scanning protein microarrays, which are created by putting molecules in specific order on a glass plate so they can be studied by microscope. "These protein microarrays, which will be used on board the space shuttle in 2006, are specially designed to show any contamination by humans. Our results show that we managed to maintain sterile conditions," Steele said. The samples were also studied in laboratories at Carnegie, the Smithsonian Institution, the University of Oslo, Penn State University in Pennsylvania and the University of Leeds. "Microorganisms in ice are tough survivors," said Liane Benning, of the University of Leeds. "Small ecosystems in the ice had apparently adapted to extremely cold conditions." The team is also developing biosensor technology that could be used to help detect any life on Mars. -- http://www.space.com/scienceastronomy/051004_mars_like.html Test Equipment Finds Life in Mars-like Conditions By SPACE.com Staff 04 October 2005 In a test of equipment that might one day be used to search for biological activity on Mars, researchers discovered life tucked deep inside a frozen Norwegian volcano. The test region is said to have geology similar to that of Mars. "We tested equipment that we are developing to look for life on Mars and discovered a rare and complex microbial community living in blue ice vents inside a frozen volcano," Hans Amundsen of the University of Oslo said today. "The instruments detected both living and fossilized organisms, which is the kind of evidence we'd be searching for on the Red Planet." Building on previous discovery Amundsen leads a group called the Arctic Mars Analog Svalbard Expedition, or AMASE. Previous work by the group uncovered life in the barren region above the Arctic Circle last year. The new discovery involves a unique community of microbes deep within the volcano. "Ice-filled volcanic vents, such as these, are likely to occur on Mars and may be a potential habitat for life there," said Carnegie Institution researcher Andrew Steele, science leader of the project. Some scientists think life on Earth may have begun in and around volcanoes. The AMASE scientists found signatures of microorganisms and fossils embedded in the volcano's ice and on surfaces and cracks of rocks. "Our instrument, designed by scientists at the Jet Propulsion Lab (JPL), detected minute quantities of aromatic hydrocarbons from microorganisms and lichens present in the rocks and ice," said JPL researcher Arthur Lonne Lane. Keep it clea
[meteorite-list] Moon Discovered Orbiting 10th Planet (2003 UB313)
W.M. Keck Observatory
65-1120 Mamalahoa Hwy.
Kamuela, HI 96743
Media Contact:
Laura K. Kraft, (808) 885-7887
October 3, 2005
MOON DISCOVERED ORBITING 10th PLANET
New Class of Satellites Discovered
MAUNA KEA, Hawaii -- Scientists are over the moon at the W. M. Keck
Observatory and the California Institute of Technology over a new
discovery of a satellite orbiting the Solar System's 10th planet (2003
UB313). The newly discovered moon orbits the farthest object ever seen in
the Solar System. The existence of the moon will help astronomers resolve
the question of whether 2003 UB313, temporarily nicknamed "Xena," is more
massive than Pluto and hence the 10th planet. A paper describing the
discovery was submitted to the Astrophysical Journal Letters on October 3,
2005.
"We were surprised because this is a completely different type of
satellite from anything we've seen before," said Dr. Mike Brown, professor
of Planetary Sciences at the California Institute of Technology in
Pasadena. "It is essentially a new class of satellites to large Kuiper
Belt objects. It is tiny compared to the primary, and much fainter. We
have never seen satellites like this before."
The newly discovered moon, which is 60 times fainter than its parent body,
is affectionately called "Gabrielle" after the faithful traveling
companion to Xena on the syndicated TV series. Future observations with
the 10-meter Keck II telescope and the Hubble Space Telescope will
determine the moon's orbital characteristics, which has an estimated
period of about 14 days, and will therefore reveal the precise mass and
density of Xena.
"What is interesting is that Xena, Pluto and Santa, three of the four
largest objects in the Kuiper belt, all have moons," said Dr. Marcos van
Dam, adaptive optics scientist at the W. M. Keck Observatory and co-author
on the paper describing the discovery. "These moons suggest that these
Kuiper belt objects may have formed differently than smaller objects in
the same region."
The moon circling Xena was first discovered with the Keck II telescope on
September 10, 2005 (UT) using the Laser Guide Star Adaptive Optics system
(LGS AO). Since 2003, this system has been providing very high spatial
resolution imaging in the infrared comparable to that of visible light
images from Hubble Space Telescope. With LGS AO, observers not only get
higher resolution, but the light from distant objects is concentrated over
a much smaller area on the instrument detector, making faint detections
possible. The results are quickly advancing the understanding of binary
Kuiper belt objects, a region in the Solar System beyond the orbit of
Neptune.
The Keck LGS AO system has also been used to look at other recently
discovered large bodies in the Kuiper belt. A small moon was found
circling around 2003 EL61 (codenamed "Santa") but none was found orbiting
2005 FY9 ("Easterbunny"), the two largest known Kuiper belt objects after
Xena and Pluto.
"When we test collision models to predict how Pluto and Charon formed, the
models kept producing tiny satellites, much smaller than Charon," added
Brown "But we had never seen satellites that small before in the Kuiper
belt. But then we found a moon in the Santa system, and then we found
another moon circling Xena, and they both look very similar to one
another. This leads us to conclude that the largest objects in the Kuiper
belt may have been subject to collisions."
Van Dam described the discovery: "At first we saw this little faint thing
that kept cropping up in all the images, and we knew it was not a
background star or galaxy because it moved across the sky with the
primary. We could also tell that it was not an image artifact because it
did not rotate with the sky and was consistent in each of the 24 images.
By morning we knew that we had made a major discovery."
The discovery of the moon's primary, Xena, was announced July 29th by
planetary astronomers Mike Brown of Caltech, Chad Trujillo of Gemini
Observatory and David Rabinowitz of Yale University. It is currently about
97 astronomical units from the Sun (an astronomical unit is the
93-million-mile distance between the Sun and Earth), and is larger than
the size of Pluto. It takes 560 years to complete one trip around the Sun
(versus 250 years for Pluto) and has a very steep angle in relation to the
other planets, about 45 degrees off from the orbital plane of the other
nine planets. Xena also has a very elliptical orbit, coming in as close as
3.5 billion miles (38 AU) and as far away as 9 billion miles.
The names "Xena," "Gabrielle," "Santa" and "Easterbunny" are temporary
nicknames until the International Astronomical Union (IAU) rules on their
official names. The proposed names have been submitted to the IAU and will
follow the mythological and spiritual traditions of Kuiper belt objects.
Meanwhile, the IAU has stated it will not rule on a name until the IAU
Working Group in charg
[meteorite-list] AD - Last Day - "Best Offer Takes It"
Dear List Members, Today is the last day to get your best offers in on two very nice Saharan irons I am offering. This is another "Best Offer Takes It" silent auction for list members that will end today, October 4th, 2005 at 10:00PM EST (Florida, USA). Here are the descriptions and direct links to pictures (worth looking at even if you are not interested in making an offer): Item #1 2016 gram iron most likely paired to NWA 854 "Ziz", a IAB that is simply gorgeous! It has a bluish hue to the crust and flow lines. http://www.lunarrock.com/irons/desertiron1.jpg Item #2 5045 gram unclassified SCULPTURAL Saharan iron. This one stands up by itself. I have not cut or polished a window to see what this. http://www.lunarrock.com/irons/desertiron2.jpg To place your offer for either of these, please email me at [EMAIL PROTECTED] and write your highest bid and description in your message. If I like the highest offer, I will accept it and these items will no longer be available so make sure you place the highest bid you are comfortable with. I will email the person with the highest acceptable offer and make payment and shipping arrangements after the deadline has been reached. On another note, if you are interested in unclassified desert meteorites, large NWA 869 material, 1-kilo lots, wholesale mesosiderites and more, I have 66 eBay auctions with competitive "Buy it Now" pricing that end this Thursday under seller, "naturesvault". Tomorrow I will resume my regular "naturesvault" eBay auctions consisting of many rare achondrites, planetary and other beautiful meteorites worth looking at. I will also be starting to announce new "Weekly Specials" which are typically very rare. To see these eBay auctions, go to eBay and search for items by seller, "naturesvault". "Thank You" for considering these two "Best Offer Takes It" irons (which end tonight at 10pm) and for bidding on my eBay "naturesvault" auctions. Good Luck to those who have made offers so far. Best regards, Greg Hupe The Hupe Collection naturesvault (eBay) [EMAIL PROTECTED] IMCA 2185 __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] AD: Rare Falls on eBay
http://members.ebay.com/aboutme/zagami/ Howdy Folks, In case anyone is interested, I have posted a couple dozen pieces of rare falls etc. on ebay. http://members.ebay.com/aboutme/zagami/ Just click on the above link to take you to the auctions. Several are from the Nininger Collection, a couple are more than 200 years old, and a few others have very low, sometimes sub-Kg TKWs. Here is a list of locations: Trenzano Vouille' Shelbourne Axtell Avanhandava Assisi Apt (1803 Fall) Allegan Albareto (1766 Fall) Almogordo Abee Boxhole-oriented Bowesmont Bereba Beardsley Bachmut Elenovka Crab Orchard Butsura Bur-Gheluia Bruderheim Brewster Kunashak Kulnine Juvinas Hugoton Greenwell Springs Goalpara Fisher (Nininger Collection) Nuevo Mercurio Modoc Miller Menow Loomis Little Piney (hit a tree) L'Aigle (Nininger Collection) Gobabeb Shalka Pultusk (Nininger Collection) Potter (Huss/AML) Pesyanoe Paragould Zhovtnevyi Washougal Travis County Sutton Starvopol Songyuan Happy Hunting. Martin http://members.ebay.com/aboutme/zagami/ __ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Ebay Negative Feed back
Hi Al, Harlan and all The biggest auction page from Argentina, www.mercadolibre.com.ar, which is associated with e-bay, developed a much better feedback system. You have 30 days to leave feedback, but the other part can't see the feedback he received until he put his feedback or the 30 days end. So no way of retaliate. Then you can make a comment on the feedback received just as oyu can on e-bay. This system is much better than the one of e-bay. Anyway I don't think that a suggestion to e-bay will make them change their system, especially because they charge when you try to take out the negative feedbacks... Eduardo -Original Message- From: "harlan trammell" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED], [EMAIL PROTECTED], Meteorite- [EMAIL PROTECTED] Date: Mon, 03 Oct 2005 21:48:13 + Subject: Re: [meteorite-list] Ebay Negative Feed back > i am still trying to develope a > "bad feedback sniper" that will automatically leave feedback (of any > type) at the LAST SECOND, so that it times out and the other cannot > retaliate. i am still trying to figure out ebay's time engine on such. > this would purify ebay. E-E-E-verybody on ebay has good feedback, just > from the fear of retaliatory bad feedback! > i will be gradually switching over to yahoo mail (it has 100 FREE > megs of storage). please cc to: href="mailto:[EMAIL PROTECTED]">[EMAIL PROTECTED] > > > > From: Michael L Blood <[EMAIL PROTECTED]>To: Al > Mitterling <[EMAIL PROTECTED]>,Meteorite List > Subject: Re: > [meteorite-list] Ebay Negative Feed backDate: Mon, 03 Oct > 2005 11:56:42 -0700>Hi Al and all,> The eBay feedback > system is so transparently flawed I give>it nearly zero > credibility. If someone has multiple complaints,>only then does > it matter to me. I never use it unless a buyer>directly pleads > with me and I don't give a damn if anyone uses>it with > me.> Since this whole rating thing is based on the whims of a > huge>population peppered here and there with sickos, I consider > any>rating over 97%+ excellent and 100% nothing short of > miraculous.> Al, it is clearly "unfair" that you got dinged but > that is the>nature of > this eBay set up. It should always be viewed as > generally>reflecting the business practices of an individual. > Anyone within the>97%+ range indicates only whackos have a > problem with him/her.> While a "perfect 100%" is what all > dealers should strive for, it>is unrealistic to believe any of > us could maintain it because there>ARE people who will try to > cheat you and when you don't let them>they will strike back with > a negative feedback.> Your one "defense" is a responding > feedback - but even then,>eBay screws you again by limiting you > to like 25 words! Even so,>you can clarify (within obvious > limits) what really occurred. Then,>since your rating is like > 99% anyone looking into the single negative>feedback can trace > your response and read it. It ends up hurting the>original > complainer far more than you, as > they inevitably have multiple>complaints and you have one. Who's > most believable in a such a "he>said - she said" > scenario?> I know it is frustrating when one works for years > attempting to>be entirely fair in every way in every deal. You > start to take a good>deal of "pride" in being a 100% honest and > fair dealer under every>circumstance. Then comes the time > someone tries to cheat you>and you won't let them - and they > ding YOUR reputation! But,>remember, while pride, when properly > aligned can be a good thing, it>can also be destructive if we > become obsessed.> So, word your negative feedback carefully and > rationally and>anyone so inclined can trace your "negative > feedback" and check>out your response. But, do you think anyone > will be concerned if you>have a 99.7% positive rating?> > Unfair, yes. > Damaging? - not really. Only the most naive people>could > possibly think someone with hundreds of deals "should" have>a > perfect rating when the rating is based on the whims of a > public>that includes all manor of whackos and deviants.> > It is good you care about your reputation. It wouldn't be > good>to obsess about it. 99% makes you A # 1 in any sane > person's book.> Best wishes, > Michael>>>on > 10/3/05 9:57 AM, AL Mitterling at [EMAIL PROTECTED] > wrote:>> > List,> >> > I'll only > burden the list with this one time then prefer people email me> > > in private so we don't take up list space. I have received a > negative> > feedback for the first time out about 450 some > transactions.> >> > The negative feed back came as > a result of > my negative feed back to them> > for not paying for and item > they won after four weeks and three days. I> > am interested > in sharing the name of this ebay buyer for others to> > > avoid. Their complaint with me was I don't except paypal BUT in > my> > listing I always state that I don't except paypal. Had > they asked me to> > simply cancel the transaction since they > didn't realize I didn't take> > p
