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Saturn
Planet ProfileMass (kg) 5.69 x 10^26 Diameter (km) 120660 Mean density (kg/m^3) 690 Escape velocity (m/sec) 35600 Average distance from Sun (AU) 9.539 Rotation period (length of day in Earth hours) 10.2 Revolution period (length of year in Earth years) 29.46 Obliquity (tilt of axis in degrees) 26.7 Orbit inclination (degrees) 2.49 Orbit eccentricity (deviation from circular) 0.056 Mean temperature (K) 88 K (1 bar level) Visual geometric albedo (reflectivity) 0.46 Atmospheric components: 97% hydrogen, 3% helium, .05% methane Rings: Rings are 270,000 km in diameter, but only a few hundred meters thick. Particles are centimeters to decameters in size and are ice (some may be covered with ice); there are traces of silicate and carbon minerals. There are four main ring groups and three more faint, narrow ring groups separated by gaps called divisions.
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11/2011 |
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