Proteus - Geology, shape, and catastrophic destruction

Details Proteus - Geology, shape, and catastrophic destruction Proteus - Geology, shape, and catastrophic destruction

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992icar...99..402c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 99, no. 2, p. 402-419.

Astronomy and Astrophysics

Astronomy

27

Astronomical Photography, Icy Satellites, Neptune Satellites, Impact, Planetary Evolution, Satellite Surfaces, Shapes

Scientific paper

Least-squares fits to the two available limb profiles of Proteus yield a sphericity close to unity; the visual irregularity is due to a degree of surface roughness comparable to that of Hyperion and the smaller icy satellites. A network of streaks that can be interpreted as tectonic troughs cuts the surface of Proteus, and is organized concentrically around either one of the two nearly-coincident Proteus-Neptune of Pharos axes of symmetry. If the streaks are tectonic, they may be due to tidal stresses generated by a past change in Proteus' equilibrium orientation. The streaks may also be disruptive-stress fractures.

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