Bibliographic Details
| Title: |
Surface composition of Hyperion. |
| Authors: |
Cruikshank, D. P., Dalton, J. B., Ore, C. M. Dalle, Bauer, J., Stephan, K., Filacchione, G., Hendrix, A. R., Hansen, C. J., Coradini, A., Cerroni, P., Tosi, F., Capaccioni, F., Jaumann, R., Buratti, B. J., Clark, R. N., Brown, R. H., Nelson, R. M., McCord, T. B., Baines, K. H., Nicholson, P. D. |
| Source: |
Nature. 7/5/2007, Vol. 448 Issue 7149, p54-56. 3p. 1 Color Photograph, 2 Graphs. |
| Subjects: |
Albedo, Surface of the earth -- Optical properties, Aerospace telemetry, Remote sensing, Space vehicles, Spectrum analysis |
| Abstract: |
Hyperion, Saturn’s eighth largest icy satellite, is a body of irregular shape in a state of chaotic rotation. The surface is segregated into two distinct units. A spatially dominant high-albedo unit having the strong signature of H2O ice contrasts with a unit that is about a factor of four lower in albedo and is found mostly in the bottoms of cup-like craters. Here we report observations of Hyperion’s surface in the ultraviolet and near-infrared spectral regions with two optical remote sensing instruments on the Cassini spacecraft at closest approach during a fly-by on 25–26 September 2005. The close fly-by afforded us the opportunity to obtain separate reflectance spectra of the high- and low-albedo surface components. The low-albedo material has spectral similarities and compositional signatures that link it with the surface of Phoebe and a hemisphere-wide superficial coating on Iapetus. [ABSTRACT FROM AUTHOR] |
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| Database: |
Psychology and Behavioral Sciences Collection |
