Ceres: High-Resolution Mapping and Determination of Physical Properties

Details Ceres: High-Resolution Mapping and Determination of Physical Properties Ceres: High-Resolution Mapping and Determination of Physical Properties

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9748p&link_type=abstract

HST Proposal ID #9748

Computer Science

Hst Proposal Id #9748 Solar System

Scientific paper

We propose a modest, 6-orbit HST ACS/HRC program to fully map the asteroid 1 Ceres for the first time. These high signal-to-noise, high resolution maps will be obtained in three ACS filter bandpasses from the visible to the UV. The goals of our program are to advance knowledge about Ceres dramatically, to resolve certain longstanding issues regarding Ceres, and to support planning for the Dawn Discovery mission's planned orbital tour of Ceres. The specific scientific objectives of this proposed Cycle 12 effort are: {1} To achieve dense rotational phase coverage with multi-spectral imaging over the complete rotation period of Ceres to map its surface; {2} To resolve surface features and investigate the nature of the Piazzi feature detected by HST/FOC in 1995; {3} To track surface features in order to unambigously determine Ceres' pole position; {4} To measure the three-dimensional shape of Ceres better than any existing shape model in order to significantly refine density measurements; and {5} To map Ceres' color variegation and photometric parameters in order to identify possible surface units for the first time. These goals require high resolution visible and ultraviolet imaging, which can only be obtained with HST. As we demonstrate in this proposal, the January, 2004 opposition of Ceres is the best in the next 6 years for both data quality and planning of the Dawn mission.

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