Spectrophotometry of PHOBOS and Deimos

Details Spectrophotometry of PHOBOS and Deimos Spectrophotometry of PHOBOS and Deimos

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3744z&link_type=abstract

HST Proposal ID #3744

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #3744

Scientific paper

The satellites of Mars have been studied by the Mariner 9, Viking, and Phobos 2 missions. They are small, dark, and irregularly shaped, and have often been described as analogues of C-type mainbelt asteroids and some carbonaceous chondrites. Being the only such objects closely inspected by rendezvous spacecraft, they provide benchmarks for comparison of disk-integrated with disk-resolved objects, and thus thus are vital in interpretation of astronomical data for many solar system objects. Also Phobos and Deimos have substantially different surface features, and promise substantial interpretive benefit by their variety. However groundbased observations that would allow direct comparisons with the asteroids are very difficult to obtain, and recent observa- tions call into serious question the analogy with both carbonaceous chondrites and C-type asteroids. Also the connection with meteorites is poorly established because of severe limitations of available reflectance data obtained from rendezvous spacecraft. Thus we propose HST spectrophotometry of both satellites and three comparison asteroids.

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