ESA Science & Technology04-Jul-2005 14:21:05

Saturn's Moons

Atlas

XV - Discovered by Terrile (1980)

Physical Parameters

Orbital Parameters

Radius (km)

18.5x17.2x13.5

Radius (km)

137 670

Mean Density (kgm-3)

630

Period

14h 25m

Mass (kg)

1.1 x 1016

Velocity (kms-1)

16.63

Magnitude (V0)

19.0

Rotational Period

-

Escape Velocty (kms-1)

-

Eccentricity

-

Mean Surface Albedo

0.4

Inclination ( )

-

Knowledge before Cassini-Huygens

Atlas was discovered during the Voyager 1 flyby of the Saturnian system in 1980. It orbits between the outer edge of the A ring, but inside the F ring. It is believed that the moon plays an import role in defining the outer edge of the A ring.

*Note: in the following section all images courtesy NASA/JPL/Space Science Institute unless stated otherwise.

29 June 2004

Cassini Instrument: Imaging Science Subsystem

Date: 26 and 27 May 2004

Distance: ~ 19.2 million km

Images Notes: Cassini's first observation of Atlas. There are 3 moons in the image (from left to right) Atlas, Prometheus and Epimetheus.



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