Crescent Tethys (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)

Caption NASA:"Sunlight illuminates the deep cut of Ithaca Chasma on Saturn's moon Tethys. Ithaca Chasma runs roughly North-South for more than about 1000 Km (approx. 620 miles) on Tethys.
Lit Terrain seen here is on the Saturn-facing side of Tethys. North on Tethys is up and rotated 18° to the right.

The image was taken in visible light with the Cassini Spacecraft narrow-angle camera on June 2, 2010. The view was obtained from a distance of approx. 477.000 Km (about 296.000 miles) from Tethys and at a Sun-Tethys-Spacecraft, or Phase, Angle of 127°.
Image scale is roughly 3 Km (a little less than 2 miles) per pixel".