Surface features of PHOBOS and Deimos

Details Surface features of PHOBOS and Deimos Surface features of PHOBOS and Deimos

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...40..223t&link_type=abstract

Icarus, vol. 40, Nov. 1979, p. 223-243.

Computer Science

33

Craters, Deimos, Phobos, Structural Properties (Geology), Surface Properties, Bridges (Landforms), Cratering, Ejecta, Flat Surfaces, Grooves, Meteorite Craters, Regolith

Scientific paper

Viking Orbiter images have provided nearly complete coverage of the two satellites of Mars and have been used to construct maps of the surface features of Phobos and Deimos. The satellites have radically different appearances although nearly all features on both objects were formed directly or indirectly by impact cratering. Phobos has an extensive network of linear depressions (grooves) that probably were formed indirectly by the largest impact recorded on Phobos. Deimos lacks grooves as well as the large number of ridges that occur on Phobos. Craters on Deimos have substantial sediment fill; those on Phobos have none. Evidence of downslope movement of debris is prominent on Deimos but is rare on Phobos. Many of the differences between Phobos and Deimos may be caused by modest differences in mechanical properties. However, the lack of a very large crater on Deimos may be responsible for its lack of grooves.

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