PHOBOS - Surface density of impact craters

Details PHOBOS - Surface density of impact craters PHOBOS - Surface density of impact craters

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...30..595t&link_type=abstract

Icarus, vol. 30, Mar. 1977, p. 595-597.

Physics

Craters, Impact Damage, Phobos, Deimos, Density Distribution, Diameters, Longitude, Mariner 9 Space Probe, Surface Properties

Scientific paper

Revised crater counts for Phobos are presented which are based on uniform Mariner 9 imagery and Duxbury's (1974) map of the satellite. The contiguous portion of the satellite's surface on which all craters down to the limiting resolution of 0.2 to 0.3 km in diameter would be expected to be identified is delineated and found to contain 87 identifiable craters larger than 0.2 km in diameter. Analysis of the crater size distribution shows that the surface appears to be saturated for craters exceeding 1 km in diameter but the crater counts definitely fall below the saturation curve for smaller craters. Reasons for this fall-off are considered, and it is noted that too few craters are visible in Mariner 9 images of Deimos to permit meaningful crater counts on that satellite's surface. It is concluded that, contrary to a previous assertion, the surfaces of Phobos and Deimos are not known to be saturated with craters larger than 0.2 km in diameter.

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