Computer Science
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8660f&link_type=abstract
HST Proposal ID #8660
Computer Science
Hst Proposal Id #8660 Solar System
Scientific paper
We propose to continue our long-term survey of Saturn's rings, using the unique capabilities of the WFPC2, to obtain a coherent set of high resolution, multi-color images of the Saturnian ring system over the full range of ring tilt and phase angles accessible from the Earth over the course of 1/4 Saturn year {7 Earth years}. Our Cycle 6 {program 6806} and long-term Cycle 7 {7427} and Cycle 8 {8398} observations explored the rings from their nearly edge-on aspect, just after the most recent ring plane crossings, to their current moderate inclination. Here, we propose to complete our survey during the next three Saturn oppositions {Cycles 9-11}, as the rings gradually approach their most open configuration, shortly before the arrival of the Cassini spacecraft at Saturn. Our key goals are to investigate the composition, structure, and particle properties of the rings from variations of ring brightness and color with radius, tilt and phase angle, to measure the azimuthal asymmetry of the A ring and the temporal variability of the clumpy F ring, to follow the enigmatic behavior of the renegade satellites Prometheus and Pandora, and to observe the co-orbital satellites Janus and Epimetheus as they exchange orbits in February 2002.
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