Spectroscopic evidence for two achondrite parent bodies - Asteroids 349 Dembowska and 4 Vesta

Details Spectroscopic evidence for two achondrite parent bodies - Asteroids 349 Dembowska and 4 Vesta Spectroscopic evidence for two achondrite parent bodies - Asteroids 349 Dembowska and 4 Vesta

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44..513f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, Mar. 1980, p. 513-524.

Computer Science

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Achondrites, Asteroids, Infrared Spectra, Meteoritic Composition, Spectroscopic Analysis, Meteorite Collisions, Olivine, Pyroxenes, Spectrometers, Asteroids, Dembowska Asteroid, Vesta Asteroid, Spectroscopy, Achondrites, Parent Bodies, Infrared, Spectrum, Olivines, Pyroxenes, Abundance, Composition, Comparisons, Data, Mineralogy, Observations, Plagioclase, Feldspar, Wavelengths, Chondrites, Models, Eucrites, Howardites, Diogenites, Origin, Distribution, Fragmentation, Stony Iron Meteorites, Erosion, Collisi

Scientific paper

A Fourier spectrometer was used to obtain IR spectra of asteroids 349 Dembowska and 4 Vesta. The spectrum of Dembowska shows olivine and pyroxene with an olivine/pyroxene abundance ratio greater than 2, and possibly as high as 10. This is probably an unsampled achondritic composition, similar to the unique achondrite ALHA 77005. Dembowska's mineralogy therefore appears related to the achondrites; pyroxene and plagioclase feldspar are seen, with a pyroxene/feldspar abundance ratio between 1.5 and 2.0. Time-resolved observations over one-half of the rotation period indicate compositional homogeneity; both 349 Dembowska and 4 Vesta can be considered as candidates for the parent bodies of igneous meteorites.

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