Atlas

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Atlas
Atlas is an inner satellite of Saturn. Atlas was discovered by Richard Terrile in 1980 from Voyager photos and was designated S/1980 S 28. In 1983 it was officially named after Atlas of Greek mythology, because it "holds the rings on its shoulders" like the Titan Atlas held the sky up above the Earth. Atlas is the closest satellite to the sharp outer edge of the A ring, and was long thought to be a shepherd satellite for this ring. However, now it is known that the outer edge of the ring is instead maintained by a 7:6 orbital resonance with the larger but more distant moons Janus and Epimetheus. In 2004 a faint, thin ring, temporarily designated R/2004 S 1, was discovered in the Atlantean orbit. Atlas (moon) - Wikipedia, the free encyclopedia
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Short Description Atlas is an inner satellite of Saturn. Atlas was discovered by Richard Terrile in 1980 from Voyager photos and was designated S/1980 S 28. In 1983 it was officially named after Atlas of Greek mythology, because it "holds the rings on its shoulders" like the Titan Atlas held the sky up above the Earth. Atlas is the closest satellite to the sharp outer edge of the A ring, and was long thought to be a shepherd satellite for this ring. However, now it is known that the outer edge of the ring is instead maintained by a 7:6 orbital resonance with the larger but more distant moons Janus and Epimetheus. In 2004 a faint, thin ring, temporarily designated R/2004 S 1, was discovered in the Atlantean orbit. Atlas (moon) - Wikipedia, the free encyclopedia
Discovered by Terrile, Voyager 1
Discovery date October, 1980
Type Moon
AddInfo Saturn XV
Satellite of Saturn
Orbit Prograde
Rotation Synchronous
Apoapsis 06 137 835 km
Periapsis 06 137 505 km
Semi-major axis 06 137 670 km
Distance from Sun 01 9.554 909 au /04
Eccentricity 0.001 2
Orbital period 0.601 694 788 3 day
Orbital speed 02 16.63 km/s
Inclination to the equator 000.003°
Diameter/Size 02 30.6 ± 2.4 km
Dimensions 40.8  ×  35.4  ×  18.8 km
Mass 1015×6.60 kg
Density  0.46 ± 0.11 g/cm3
Surface gravity  0,0017 m/s2
Escape velocity 01 6 m/s
Rotation period 0.601 694 788 3 day
Axial tilt
Albedo geometric 0.4
Temperature mean 02 81 K | −192 °C
Apparent magnitude 18.5
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