Rhea (moon) facts for kids

Kids Encyclopedia Facts
Rhea
PIA07763 Rhea full globe5.jpg
Cassini view of Rhea's anti-Saturnian hemisphere, showing the moon's two largest impact basins (Mamaldi above and left of center, and adjacent Tirawa to its upper right). At highest resolution, several long linear features are visible: halfway down from center is Harahvaiti Fossa, while near the limb left of the bottom is Koykamou Catena.
Discovery
Discovered by G. D. Cassini
Discovery date December 23, 1672
Designations
Saturn V
Adjectives Rhean
Orbital characteristics 
Semi-major axis
527 108 km
Eccentricity 0.001 258 3
4.518 212 d
Inclination 0.345° (to Saturn's equator)
Satellite of Saturn
Physical characteristics
Dimensions 1532.4×1525.6×1524.4 km 
Mean radius
763.8 ± 1.0 km 
7 337 000 km²
Mass (2.306 518 ± 0.000 353)×1021 kg (~3.9×10−4 Earths)
Mean density
1.236 ± 0.005 g/cm³
0.265 m/s²
0.635 km/s
4.518 212 d
(synchronous)
zero
Albedo 0.949 ± 0.003 (geometric) 
Surface temp. min mean max
Kelvin 53 K   99 K
10 
Rhea true color
Photo of Rhea taken by the Cassini-Huygens probe

Rhea (/[unsupported input]ˈrə/; Ancient Greek: Ῥέᾱ) is Saturn's second largest moon. It is made of ice and rock.

Ring system

Rhea may have a thin ring system with three narrow bands in a disk of solid particles. These would be the first rings seen around a moon. The discovery was announced in the journal Science on March 6, 2008.

Images for kids


Rhea (moon) Facts for Kids. Kiddle Encyclopedia.