Rhea (moon)
Appearance
Discovery | |||||||||
---|---|---|---|---|---|---|---|---|---|
Discovered by | G. D. Cassini | ||||||||
Discovery date | December 23, 1672 | ||||||||
Designations | |||||||||
Saturn V | |||||||||
Adjectives | Rhean | ||||||||
Orbital characteristics [1] | |||||||||
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) | ||||||||
| |||||||||
10 [2] | |||||||||
Rhea (/ˈriːə/;[a] Ancient Greek: Ῥέᾱ) is Saturn's second largest moon. It is made of ice and rock.
Ring system
[change | change source]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.
Notes
[change | change source]References
[change | change source]Wikimedia Commons has media related to Rhea.
- ↑ Natural Satellites Ephemeris Service Minor Planet Center
- ↑ Observatorio ARVAL (April 15, 2007). "Classic Satellites of the Solar System". Observatorio ARVAL. Retrieved 2011-12-17.