Epimetheus is a small natural satellite of Saturn, discovered in 1966 by the astronomer Richard Walker. It is named after a figure from Greek mythology, Epimetheus, who was the brother of Prometheus. The moon is notable for its irregular shape and size, with an average diameter of about 116 kilometers (72 miles). One of the interesting aspects of Epimetheus is its unique orbital relationship with another moon, Janus.
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