Mineralogy of Asteroid 1459 Magnya and implications for its origin

Details Mineralogy of Asteroid 1459 Magnya and implications for its origin Mineralogy of Asteroid 1459 Magnya and implications for its origin

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004icar..167..170h&link_type=abstract

Icarus, Volume 167, Issue 1, p. 170-177.

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Composition, Mineralogy, Spectroscopy, Infrared Observations

Scientific paper

Detailed near-infrared spectral observations of Asteroid 1459 Magnya reveal an asteroid that is primarily composed of pyroxene and plagioclase feldspar, confirming earlier suggestions that Magnya has a basaltic composition. The average Magnya spectrum for March 23, 2002 has a Band I center of 0.926 μm and a Band II center of 1.938 μm. Observations over 41/2 hours show little variation in band center positions. The feldspar-to-pyroxene ratio is ~0.6 on Magnya's surface. Comparing Magnya with the spectral parameters from 4 Vesta shows discordant pyroxene chemistries; Magnya's pyroxenes contain ~10 mol% less Fs than Vesta's pyroxenes. This suggests that Magnya originated from a parent body other than 4 Vesta and that its progenitor formed in a more chemically reduced region of the solar nebula within the asteroid belt.

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