Prometheus (moon)

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Prometheus is an inner satellite of Saturn. It was discovered on 24 October 1980 from images taken by the Voyager 1 probe, and was provisionally designated S/1980 S 27. In late 1985 it was officially named after Prometheus, a Titan in Greek mythology. It is also designated Saturn XVI. Prometheus is extremely elongated, measuring approximately 137 km × 81 km × 56 km (85 mi × 50 mi × 35 mi). The surface is heavily cratered, giving it a similar appearance to nearby Epimetheus and Janus. It has several ridges and valleys and a number of impact craters of about 20 km (12 mi) diameter are visible. From its very low density and relatively high albedo, it is likely that Prometheus is a very porous icy body.

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