Color composite image of Rhea made from raw images acquired by Cassini on March 29, 2012.
About 950 miles (1525 km) wide, Rhea is less than a third the size of Titan, Saturn’s largest moon. Rhea is very reflective, indicating that it is made up of a lot of water ice which behaves like solid rock at the low temperatures found there – from -280º to -360º F.
Rhea is one of the most heavily-cratered bodies in the entire Solar System.
Credit: NASA/JPL/Space Science Institute. Color composite by Jason Major.