Cassini views of Tethys and Mimas

Cassini has just passed the periapsis (closest approach) of its 48th orbit of Saturn, and this time around there were two icy moons in position for the spacecraft to catch some pretty pictures as it flew by: Tethys and Mimas.

Cassini approached Tethys with a crescent view of the moon. This mosaic was assembled from three images captured on approach; there are lots more close-up images from the flyby on the Cassini raw images website, but I thought these provided the nicest view.