Janus and Epimetheus

Original caption:"Outside the soft edge of Cassini's F-Ring, Epimetheus and Janus negotiate their nearly-shared orbit. The two moons' orbits are typically about 50 Km (approx. 30 miles) apart, and the moons actually change orbits every few years: one moon becoming the innermost of the pair, the other becoming the outermost.
Epimetheus' diameter is 116 Km while Janus' diameter is 181 Km across.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Sept. 8, 2005, at a distance of approx. 1,5 MKM (about 1 MMs) from Saturn. The image scale is about 11 Km (roughly 7 miles) per pixel on the two moons".