Saturn: Moons: Calypso

Calypso is a Trojan (trailing moon) of the larger moon Tethys.

Calypso is a Trojan (trailing moon) of the larger moon Tethys. Calypso trails Tethys in its orbit by 60 degrees. Telesto is the other Tethys Trojan, orbiting Saturn 60 degrees ahead of Tethys.

Calypso is 22 kilometers (14 miles) across. Calypso, like many other small Saturnian moons and small asteroids, is irregularly shaped by overlapping large craters. Although the resolution here is not as high as in Cassini's best images of Pandora and Telesto, this moon appears to also have loose surface material capable of smoothing the appearance of craters.

Discovery
Calypso was discovered by D. Pascu, P.K. Seidelmann, W. Baum and D. Currie in March 1980 using a ground-based telescope.

How Calypso Got its Name
Calypso (kuh-LIP-soh) was a nymph whose name means "I hide." A daughter of the Titans Oceanus and Tethys, she lived alone on her island until she fell in love with the mortal sailor and explorer Odysseus (called Ulysses by the Romans; his name means "one who suffers"). Calypso helped Odysseus find his way home after his long voyage and many dangerous adventures.