Crescent Japetus

Caption NASA:"The Cassini Spacecraft looks toward a crescent of Saturn's dark and light moon, Japetus.
Scientists continue to investigate the nature of this moon's surface. Lit Terrain seen here is in the Transition Area between the Saturn-facing Side and the Trailing Hemisphere of Japetus. North on Iapetus is up and rotated 23° to the left.

The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera on Nov. 29, 2009. The view was acquired at a distance of approx. 1,5 MKM (about 932.000 miles) from Japetus and at a Phase Angle of 117°.
Image scale in the original image was roughly 9 Km (about 5,5 miles) per pixel.
The image was contrast enhanced and magnified by a factor of two to enhance the visibility of Surface Features".