Prometheus

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Prometheus
Prometheus is an inner satellite of Saturn. It was discovered in 1980 (some time before October 25) from photos taken by the Voyager 1 probe, and was provisionally designated S/1980 S 27. In late 1985 it was officially named after Prometheus, a Titan in Greek mythology. Prometheus acts as a shepherd satellite for the inner edge of Saturn's narrow F Ring. Prometheus (moon) - Wikipedia, the free encyclopedia
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Short Description Prometheus is an inner satellite of Saturn. It was discovered in 1980 (some time before October 25) from photos taken by the Voyager 1 probe, and was provisionally designated S/1980 S 27. In late 1985 it was officially named after Prometheus, a Titan in Greek mythology. Prometheus acts as a shepherd satellite for the inner edge of Saturn's narrow F Ring. Prometheus (moon) - Wikipedia, the free encyclopedia
Discovered by Collins, Voyager 1
Discovery date October, 1980
Type Moon
AddInfo Saturn XVI
Satellite of Saturn
Orbit Prograde
Rotation Synchronous
Apoapsis 06 139 686 km
Periapsis 06 139 073 km
Semi-major axis 06 139 380 km
Distance from Sun 01 9.554 909 au /05
Eccentricity 0.002 2
Orbital period 0.612 990 038 day
Orbital speed 02 16.54 km/s
Inclination to the equator 000.008°
Diameter/Size  86.2 ± 4.0 km
Dimensions 135.6  ×  79.4  ×  59.4 km 
Mass 1017×1.595 kg
Density  0.48 ± 0.09 g/cm3
Surface gravity  0.001 3 – 0.005 8 m/s2
Escape velocity 02 19 m/s
Rotation period 0.612 990 038 day
Axial tilt
Albedo geometric 0.6
Temperature mean 02 74 K | −199 °C
Apparent magnitude 15.5
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