Cassini Imaging Science: initial results on Phoebe and Iapetus.
نویسندگان
چکیده
The Cassini Imaging Science Subsystem acquired high-resolution imaging data on the outer Saturnian moon, Phoebe, during Cassini's close flyby on 11 June 2004 and on Iapetus during a flyby on 31 December 2004. Phoebe has a heavily cratered and ancient surface, shows evidence of ice near the surface, has distinct layering of different materials, and has a mean density that is indicative of an ice-rock mixture. Iapetus's dark leading side (Cassini Regio) is ancient, heavily cratered terrain bisected by an equatorial ridge system that reaches 20 kilometers relief. Local albedo variations within and bordering Cassini Regio suggest mass wasting of ballistically deposited material, the origin of which remains unknown.
منابع مشابه
The Cratering Record of the Saturnian Satellites Phoebe, Tethys, Dione and Iapetus in Comparison: First Results from Analysis of the Cassini Iss Imaging Data
IAPETUS IN COMPARISON: FIRST RESULTS FROM ANALYSIS OF THE CASSINI ISS IMAGING DATA. G. Neukum, R. Wagner, T. Denk, C. C. Porco, and the Cassini ISS Team. Dept. of Earth Sciences, Institute of Geosciences, Freie Universitaet Berlin, Malteserstrasse 74-100, D-12249 Berlin, Germany, e-mail: [email protected], Inst. of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2,...
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عنوان ژورنال:
- Science
دوره 307 5713 شماره
صفحات -
تاریخ انتشار 2005