Phoebe

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Phoebe
Phoebe is an irregular satellite of Saturn. Phoebe was named after Phoebe, a Titan in Greek mythology that was associated with the Moon. Phoebe's orbit is retrograde, i.e. it orbits Saturn opposite to Saturn's rotation. For more than 100 years, Phoebe was Saturn's outermost known moon, until the discovery of several smaller moons in 2000. Phoebe is almost 4 times more distant from Saturn than its nearest major neighbor (Iapetus), and is substantially larger than any of the other moons orbiting planets at comparable distances. All of Saturn's regular moons except Iapetus orbit very nearly in the plane of Saturn's equator. The outer irregular satellites follow moderately to highly eccentric orbits, and none is expected to rotate synchronously as all the inner moons of Saturn do (except for Hyperion). Phoebe (moon) - Wikipedia, the free encyclopedia
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Short Description Phoebe is an irregular satellite of Saturn. Phoebe was named after Phoebe, a Titan in Greek mythology that was associated with the Moon. Phoebe's orbit is retrograde, i.e. it orbits Saturn opposite to Saturn's rotation. For more than 100 years, Phoebe was Saturn's outermost known moon, until the discovery of several smaller moons in 2000. Phoebe is almost 4 times more distant from Saturn than its nearest major neighbor (Iapetus), and is substantially larger than any of the other moons orbiting planets at comparable distances. All of Saturn's regular moons except Iapetus orbit very nearly in the plane of Saturn's equator. The outer irregular satellites follow moderately to highly eccentric orbits, and none is expected to rotate synchronously as all the inner moons of Saturn do (except for Hyperion). Phoebe (moon) - Wikipedia, the free encyclopedia
Discovered by William Henry Pickering
Discovery date 17 March 1899 & 16 August 1898
Type Moon
AddInfo Saturn IX
Satellite of Saturn
Orbit Retrograde
Rotation Retrograde
Apoapsis 08 15 063 000 km
Periapsis 08 10 841 000 km
Semi-major axis 08 12 955 759 km
Distance from Sun 01 9.554 909 au /27
Eccentricity 0.156 241 5
Orbital period 550.564 636 days
Orbital speed 01 1.70 km/s
Inclination to the ecliptic 173.04°
Inclination to the equator 151.78°
Diameter/Size 03 213.0 km
Dimensions 218.8 × 217.0  × 203.6 km
Mass 1018×8.292 kg
Density 01 1.638 ± 0.033 g/cm3
Surface gravity  0.038 – 0.050 m/s2
Escape velocity 03 100 m/s
Rotation period 9.2735 hour | 9 h 16 min 25 s
Axial tilt 152.14°
Albedo geometric 0.06
Temperature mean 02 73 K
Apparent magnitude 16.5
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