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| Cassini's Fly-by of Iapetus: Early Results from VIMS |
| Presentation Time: Monday, 10:40 a.m. - 10:50 a.m. |
Roger N. Clark1, R. H. Brown2, D. P. Cruikshank3, B. J. Buratti4, R. Jaumann5, P. D. Nicholson6, K. H. Baines4, G. Filacchione7, R. M. Nelson4, VIMS Team
1US Geological Survey, 2U. Arizona, 3NASA Ames, 4JPL, 5DLR, Germany, 6Cornell U., 7INAF-IASF, Italy. |
| Presentation Number: 06.02 |
| Cassini will fly by Saturn's moon Iapetus on September 10, 2007 at a closest approach altitude of about 2000 km. The low fly-by velocity will allow imaging spectroscopy data to be obtained with VIMS over dark terrain, the transition region into bright terrain, and bright (icy) regions of Iapetus, including good views of the equatorial bulge. Using VIMS data, which covers the spectral range from 0.35 to 5.1 microns in 352 wavelengths at spatial resolutions as high as 0.5 x 1 km, we will map materials on Iapetus' surface and study their geologic placement. Materials that will be studied include water ice, carbon dioxide, ammonia ice, and materials contributing to absorptions seen at 1.94, 2.05, 2.16, and 2.42 microns. Other weaker absorptions observed in spectra of dark material on Iapetus in previously obtained VIMS data will be examined. This talk will present preliminary results obtained by VIMS. |
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