Mathematics – Logic
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5489z&link_type=abstract
HST Proposal ID #5489
Mathematics
Logic
Hst Proposal Id #5489 Solar System Minor Planets
Scientific paper
Asteroid 4 Vesta is one of two solar system bodies beyond the terrestrial planets known to have a highly variegated surface resulting from surface lava flows. Unlike Io, Vesta's surface remains insufficiently resolved for the purpose of geologic mapping. We propose to use the Planetary Camera of the WFPC2 for global imaging of asteroid 4 Vesta in late 1994. At that geocentric distance, we expect to resolve more than 140 pixels covering 96% of Vesta's surface. Images during eight HST orbits are requested for good spatial coverage of the rotating planet. Four filter passbands ranging from 0.44 to 1.04 microns wavelength are chosen to provide mineralogical diagnosticity and to maximize the expected albedo contrast. Interpretative techniques are described which will lead to recognition and mapping of pyroxene/feldspar domains indicative of surface lava flows and olivine-rich regions exposed by impact of geologic units originally below Vesta's basaltic crust. Also we anticipate that this program will greatly enhance the interpretability of a small number of monochromatic images of Vesta to be obtained at the highest possible pixel resolution by the FOC GTO team.
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