Pan

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Pan
Pan is the second-innermost moon of Saturn. It is a walnut-shaped small moon about 35 kilometres across and 23 km high that orbits within the Encke Gap in Saturn's A Ring. Pan acts as a ring shepherd and is responsible for keeping the Encke Gap free of ring particles. The eccentricity of Pan's orbit causes its distance from Saturn to vary by ~4 km. Its inclination, which would cause it to move up and down, is not distinguishable from zero with present data. The Encke Gap, within which Pan orbits, is about 325 km wide. Pan (moon) - Wikipedia, the free encyclopedia
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Additional Information

Short Description Pan is the second-innermost moon of Saturn. It is a walnut-shaped small moon about 35 kilometres across and 23 km high that orbits within the Encke Gap in Saturn's A Ring. Pan acts as a ring shepherd and is responsible for keeping the Encke Gap free of ring particles. The eccentricity of Pan's orbit causes its distance from Saturn to vary by ~4 km. Its inclination, which would cause it to move up and down, is not distinguishable from zero with present data. The Encke Gap, within which Pan orbits, is about 325 km wide. Pan (moon) - Wikipedia, the free encyclopedia
Discovered by Mark Robert Showalter
Discovery date July 16, 1990
Type Moon
AddInfo Saturn XVIII
Satellite of Saturn
Orbit Prograde
Rotation Synchronous
Apoapsis 06 133 586 km
Periapsis 06 133 582 km
Semi-major axis 06 133 584 km
Distance from Sun 01 9.554 909 au /02
Eccentricity 0.000 014 4
Orbital period 0.575 050 718 day | 13.801 217 hour
Orbital speed  16.89 km/s
Inclination to the equator 0.000 1
Diameter/Size  28.4 ± 2.6 km
Dimensions 34.4  ×  31.4  ×  20.8 km
Mass 1015×4.95 kg
Density  0.42 ± 0.15 g/cm3
Surface gravity  0.000 1 m/s2
Escape velocity 01 6 m/s
Rotation period 0.575 050 718 day | 13.801 217 hour
Axial tilt
Albedo geometric 0.5
Temperature mean 02 78 K | −195 °C
Apparent magnitude 19.4
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