Computer Science
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000icar..147..119v&link_type=abstract
Icarus, Volume 147, Issue 1, pp. 119-128 (2000).
Computer Science
26
Scientific paper
Moderate spectral resolution observations of the 505-nm Fe2+ pyroxene absorption feature were obtained for 13 asteroids dynamically linked to 4 Vesta, or located between Vesta and the 3:1 resonance gap. Eleven showed spectra with deep 0.9-μm mafic silicate absorptions suggesting a pyroxene composition (Binzel and Xu 1993). Spectra of only six of these asteroids show the absorption feature centered at 506.5 nm, suggestive of an augite (high-calcium) component to the surface pyroxenes consistent with previous spectral observations across the surface of Vesta (Cochran and Vilas 1998). Five of the six asteroids include all objects observed at heliocentric distances between Vesta and the 3:1 resonance gap. The spectrum of only one asteroid interior to Vesta's orbit showed this feature. No correlation between the presence or absence of this feature and the strength of the 1-μm mafic silicate feature was found.
Cochran Anita L.
Jarvis Kandy S.
Vilas Faith
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