Rhea

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Rhea
Rhea is the second-largest moon of Saturn and the ninth-largest moon in the Solar System. It is the second smallest body in the Solar System, after the asteroid and dwarf planet Ceres, for which precise measurements have confirmed a shape consistent with hydrostatic equilibrium. Rhea is named after the Titan Rhea of Greek mythology, the "mother of the gods". It is also designated Saturn V (being the fifth major moon going outward from the planet). Rhea is an icy body with a density of about 1.236 g/cm3. This low density indicates that it is made of ~25% rock (density ~3.25 g/cm3) and ~75% water ice (density ~0.93 g/cm3). Although Rhea is the ninth-largest moon, it is only the tenth-most-massive moon. On March 6, 2008, NASA announced that Rhea may have a tenuous ring system. This would mark the first discovery of rings about a moon. Rhea (moon) - Wikipedia, the free encyclopedia
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Short Description Rhea is the second-largest moon of Saturn and the ninth-largest moon in the Solar System. It is the second smallest body in the Solar System, after the asteroid and dwarf planet Ceres, for which precise measurements have confirmed a shape consistent with hydrostatic equilibrium. Rhea is named after the Titan Rhea of Greek mythology, the "mother of the gods". It is also designated Saturn V (being the fifth major moon going outward from the planet). Rhea is an icy body with a density of about 1.236 g/cm3. This low density indicates that it is made of ~25% rock (density ~3.25 g/cm3) and ~75% water ice (density ~0.93 g/cm3). Although Rhea is the ninth-largest moon, it is only the tenth-most-massive moon. On March 6, 2008, NASA announced that Rhea may have a tenuous ring system. This would mark the first discovery of rings about a moon. Rhea (moon) - Wikipedia, the free encyclopedia
Discovered by Giovanni Domenico Cassini
Discovery date December 23, 1672
Type Moon
AddInfo Saturn V
Satellite of Saturn
Orbit Prograde
Rotation Synchronous
Satellites Has rings
Atmosphere Trace
Shape Equilibrium spheroid
Geological activity In the past
Apoapsis 06 527 570 km
Periapsis 06 526 510 km
Semi-major axis 06 527 108 km
Distance from Sun 01 9.554 909 au /21
Eccentricity 0.001 258 3
Orbital period 4.518 212 days
Orbital speed 01 8.48 km/s
Inclination to the equator 000.345°
Diameter/Size 04 1528.6 km
Dimensions 1532.4  ×  1525.6  ×  1524.4 km
Mass 1021×2.306 518 kg
Density 01 1.236 g/cm3
Surface gravity  0.264 m/s2
Escape velocity 03 635 m/s
Rotation period 4.518 212 days
Axial tilt
Albedo geometric 0.949
Temperature min 02 53 K
Temperature mean 02 73 K
Temperature max 02 99 K
Apparent magnitude 10 
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