Bulk density of ordinary chondrite meteorites and implications for asteroidal internal structure
نویسندگان
چکیده
منابع مشابه
Identifying Asteroidal Ordinary Chondrite Assemblages and Petrographic Types from Vnir Spectra
Introduction: Because of a poor understanding of the delivery mechanisms of meteoroids from the asteroid belt, early asteroid spectral investigations often assumed that the abundance of various meteorite types among meteorite falls was approximately proportional to the abundance of such assemblages within the asteroid population. Based on that assumption, it was concluded that a large fraction ...
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Although ordinary chondrite (OC) meteorites dominate observed falls, the identification of near-Earth and main-belt asteroid sources has remained elusive. Telescopic measurements of 35 near-Earth asteroids ( approximately3 kilometers in diameter) revealed six that have visible wavelength spectra similar to laboratory spectra of OC meteorites. Near-Earth asteroids were found to have spectral pro...
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schmelzens, und sind die Tektite von ähnlichem Ausgangsstoff abzuleiten, dann muß man jedoch Fraktionierung von Rb und Sr annehmen, um die Abweichung der Tektitenresultate von der „Isochrone" der Gläser zu erklären. Demnach ist es nicht möglich, genauere Folgerungen aus unseren Messungen hinsichtlich des Ursprungs der EK-Tektite zu gewinnen. Es ist jedoch gesichert, daß eine deutliche Ähnlichke...
متن کاملAluminum-, Calcium- and Titanium-rich Oxide Stardust in Ordinary Chondrite Meteorites
We report O-, Al-Mg-, K-, Ca-, and Ti-isotopic data for a total of 96 presolar oxide grains found in residues of several unequilibrated ordinary chondrite meteorites. Identified grain types include Al2O3, MgAl2O4, hibonite (CaAl12O19), and Ti oxide. This work greatly increases the presolar hibonite database, and is the first report of presolar Ti oxide. O-isotopic compositions of the grains spa...
متن کاملCompositional properties of Near-Earth Asteroids: spectroscopic comparison with Ordinary Chondrite Meteorites
Some years ago we started a spectroscopic survey, in the visible region, of Earth-approaching asteroids to investigate their compositional nature in order to improve the comprehension of their origin. To date we have obtained low-resolution spectra, in the range 0.5-1.0 μm, of 1 Aten (3753 1986 TO), 4 Apollo (1864 Daedalus, 5786 Talos, 1989 JA, 2063 Bacchus), and 3 Amor (3352McAuliffe, 4954 Eri...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2000
ISSN: 1086-9379,1945-5100
DOI: 10.1111/j.1945-5100.2000.tb01509.x