Telesto and Calypso 

Telesto and Calypso are two satellites of Saturn that were discovered in 1981 by B. Smith through ground-based observations. The moons are called the Tethys Trojans because they travel around Saturn in the orbit of Tethys. Telesto is 60 degrees ahead while Calypso is 60 degrees behind.

Physical Data Key Mass Mass Mass Mass compared to that of Earth. Radius Radius Radius Radius compared to that of Earth. Mean Density Average Density. Distance Distance to the planet's center. Magnitude The brightness of a star or object.

Orbital Data Key Rotational Period Number of days to make one complete rotation. Orbital Period Number of days to obital the planet. Mean Orbital Velocity Average obital speed. Orbital Eccentricity Eccentricity. Orbital Inclination The tilt of the moon or planet. Escape Escape Velocity. Albedo Visual geometric albedo.