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Earth, Moon, and Planets

, Volume 74, Issue 1, pp 61–83 | Cite as

Topography and geology of Hyperion

  • Philip J. Stooke
Article
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Abstract

I have mapped the Saturnian satellite Hyperion using Voyager 2 images obtained in 1981 and a shape model derived from the results of Thomas et al. (1995). The results are presented in tabular and graphic form, including detailed shaded relief maps of the satellite. The shape is approximated by a triaxial ellipsoid with axes of 270, 201 and 336 km. The volume is estimated to be 9.5 ± 2.0 × 106 km3. Geological interpretations were augmented by the use of ‘super-resolution’ image composites. The surface is heavily cratered. A system of scarps and an isolated mountain are interpreted as the rim and central peak of an impact crater with a diameter similar to the mean diameter of the satellite itself, the largest crater with recognizable impact morphology in relation to the size of the body yet observed in the solar system. The crater density dates that impact, not the formation of Hyperion. Grooves are identified in several images, and form part of a zone of fracturing radial to a prominent crater.

Key words

Saturn satellite geology 

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© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Philip J. Stooke

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