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   -  Pioneer 11
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Saturn Summary


Saturn Moon: Epimetheus!

This image of Epimetheus was acquired by the Voyager 1 spacecraft on November 11, 1980.  The image shows the shadow of Saturn's F Ring crossing its surface.

Epimetheus is the fifth satellite of Saturn and was discovered R. Walker in 1980. The surface presents many valleys and ridges in combination with different crustal deformations. Its heavily cratered surface indicates that the satellite is billions of years old.

Epimetheus has an orbit of 151,472 kilometers from Saturn's center, the same as Saturn's other moon Janus, and is around 50 kilometers away from it. Epimetheus and Janus swap orbits due to their close approach to each other once every four years. The momentum that is exchanged flings one inward and the other outward. The two moons may have once had a large parent and formed from the disruption of it. Epimetheus was the son of Iapetus and brother to Prometheus and Atlas. Epimetheus also means hindsight in Greek.

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