Ring geometry on Ganymede and Callisto

Details Ring geometry on Ganymede and Callisto Ring geometry on Ganymede and Callisto

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...72..209s&link_type=abstract

Icarus (ISSN 0019-1035), vol. 72, Oct. 1987, p. 209-234.

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Callisto, Ganymede, Icy Satellites, Planetary Rings, Satellite Surfaces, Canals, Impact Damage, Planetary Geology, Planetary Mapping, Jupiter, Satellites, Ganymede, Callisto, Ringed Features, Geometry, Terrain, Formation, Origin, Icy Bodies, Valhalla, Description, Crust, Analysis, Marius Regio, Galileo Regio, Impacts, Structure, Lithosphere, Topography, Hypotheses, Photographs, Maps, Furrows

Scientific paper

The authors assess the degree of circular symmetry inherent to multiringed impact structures on icy satellites by mapping the well-preserved multiring Valhalla (and Asgard) structure(s) on Callisto. With the aid of improved Ganymede coordinate control, they remap the furrow system and analyze its regional and overall circularity, both intrinsically and in comparison with Valhalla. The degree of alignment of furrows in Marius and Galileo Regio is determined, and in addition, at least three other multiring systems of varying sizes are identified. Based on furrow geometry and occurrence, the authors then reexamine large impact and alternate origins for the furrow system and evaluate the hypothesis of lateral motion within Ganymede's lithosphere.

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