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Atlas, the second of Saturn's known satellites, orbits near the outer edge of the A-ring and is about 40 by 20 kilometers (25 by 15 miles) in size. It is probably a shepherd satellite for Saturn's A-ring.
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Atlas was discovered by R. Terrile in 1980 from photographs taken by Voyager during its encounter with Saturn.
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Satellite
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Diameter: 40 km by 20 km
Discovered by: R. Terrile
Date of discovery: 1980
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