K asteroids and CO3/CV3 chondrites
نویسندگان
چکیده
منابع مشابه
Constraints on Jupiter’s Age and Formation Mechanism and the Nebula Lifetime from Chondrites and Asteroids
Introduct ion: Since the major chondritic components—chondrules, Ca-Al–rich inclusions (CAIs), and amoeboid-olivine inclusions—formed in the nebula, their ages provide a limit for the lifetime of the solar nebula. If chondritic components accreted into asteroids before Jupiter formed, then these ages also provide constraints on the time of Jupiter’s formation. Such constraints might identify wh...
متن کاملShock Effects in Eh6 Chondrites and Aubrites: Implications for Collisional Heating of Asteroids
EH6 Chondrites: The two principal groups of en-statite chondrites differ in their proportions of petro-logic types. Among EL chondrites, ~20% are type 3 and ~60% are type 6, whereas among EH chondrites, ~75% are type 3 and ~3% are type 6. As of this writing , there are five EH6 chondrites listed in the Meteor-itical Bulletin Database (MBD): A-882039, Y-793225 (EH6-an), Y-8404, Y-980211 and Y-98...
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Besides new observations, mining old photographic plates and CCD image archives represents an opportunity to recover and secure newly discovered asteroids, also to improve the orbits of Near Earth Asteroids (NEAs), Potentially Hazardous Asteroids (PHAs) and Virtual Impactors (VIs). These are the main research aims of the EURONEAR network. As stated by the IAU, the vast collection of image archi...
متن کاملSpectral reflectance properties of carbonaceous chondrites: 3. CR chondrites
Powdered samples of a suite of 14 CR and CR-like chondrites, ranging from petrologic grade 1 to 3, were spectrally characterized over the 0.3–2.5 lm interval as part of a larger study of carbonaceous chondrite reflectance spectra. Spectral analysis was complicated by absorption bands due to Fe oxyhydroxides near 0.9 lm, resulting from terrestrial weathering. This absorption feature masks expect...
متن کاملSpectral reflectance properties of carbonaceous chondrites: 8. ‘‘Other’’ carbonaceous chondrites: CH, ungrouped, polymict, xenolithic inclusions, and R chondrites
Department of Geography, University of Winnipeg, 515 Portage Avenue, Winnipeg, Manitoba, Canada R3B 2E9 Astromaterials Research and Exploration Science Office, NASA Johnson Space Center, Mail Code KR, 2101 NASA Road 1, Houston, TX 77058-3696, USA Department of Geological Sciences, Brown University, Box 1846, Providence, RI 02912-1846, USA Department of Space Studies, University of North Dakota,...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2001
ISSN: 1086-9379,1945-5100
DOI: 10.1111/j.1945-5100.2001.tb01869.x