The surfaces of Larissa and Proteus
- Philip J. Stooke
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Topographic models of Neptune's small inner satellites Larissa and Proteus were derived from the shapes of limbs and terminators in Voyager images, modified locally to accomodate large craters and ridges. The models are presented here in tabular and graphic form, including the first map of Larissa and the first detailed relief map of Proteus. The shape of Larissa is approximated by a triaxial ellipsoid with axes of 208, 192 and 178 km, but is only weakly constrained by the single available view. The volume is estimated to be 3.5 ± 1.0 × 106 km3. The surface is heavily cratered and may be crossed by one or two poorly seen linear ridges. Proteus is approximated by a triaxial ellipsoid with axes of 424, 390 and 396 km (the latter being the rotation axis dimension). The volume is estimated to be 3.4 ± 0.4 × 107 km3. Its surface appears to be very heavily cratered and extensive evidence for linear fractures is observed despite very low image quality.
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- The surfaces of Larissa and Proteus
Earth, Moon, and Planets
Volume 65, Issue 1 , pp 31-54
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- Kluwer Academic Publishers
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- Philip J. Stooke (1)
- Author Affiliations
- 1. Department of Geography, University of Western Ontario, N6A 5C2, London, Canada