Mimas briefly slipped in front of Tethys while NASA's Cassini spacecraft looked on and captured the event in this series of images.
Cassini's narrow-angle camera took the image in visible light on Feb. 11 at a distance of approximately 3.7 million kilometers (2.3 million miles) from Mimas and 4.1 million kilometers (2.5 million miles) from Tethys.
Resolution in the original images was 22 kilometers (14 miles) per pixel on Mimas (397 kilometers, or 247 miles across) and 25 kilometers (16 miles) per pixel on Tethys (1,071 kilometers, or 665 miles across). The images have been magnified by a factor of two.
