(Greek mythology) brother of Prometheus; despite Prometheus's warning against gifts from Zeus he accepted Pandora as his wife

Epimetheus is one of the 18 moons of Saturn. This moon is covered by grooves, valleys, and craters over 30 km in diameter. Epimetheus orbits at a mean distance of about 151,422 km and revolves around Saturn in about 4 hours. Epimetheus has a diameter of about 200 km and an irregular shape. Epimetheus shares an orbit with Janus (they are only separated by about 50 kilometers (31 miles)). Once every four years they approach each other, exchange some momentum and switch orbits. This icy moon was discovered from work done by astronomers R. Walker in 1966 and J. Fountain and S. Larson in 1978.

A moon of Saturn was discovered by Richard Waltker (Voyager 1) on December 18, 1966. Epimetheus shares the same orbit as the Saturnian moon Janus. Epimetheus also is designated as "Saturn XI" and "S/1980 S3". In Greek mythology, Epimetheus was a Titan, who with his brother Prometheus, acted as representatives of mankind.