The Trailing Trojan

Cassini pays a visit to Calypso

In a bit of more flyby goodness here’s a photo of Calypso, taken in ultraviolet light, showing nice shading on its surface and some interesting streak patterns that seem to follow the contours of the potato-shaped moon. This image was taken on Saturday, February 13, at a distance of about 14,000 miles.

19-mile-long Calypso is one of the “Tethys Trojan” moons, along with Telesto. They are so called because they orbit Saturn in the same path as the much larger moon Tethys, Telesto about 60º in front and Calypso behind (hence the “trailing”).

I enlarged and cropped the image from the original, and enhanced the levels a bit to bring out some of the surface details.