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Astronomy Planets - Saturn
Bulk Parameters |
Orbital Parameters
Observational Parameters |
Atmospheric Parameters
Satellites
Bulk Parameters |
Mass |
468.46 × 1024 kg |
Volume |
82 713 × 1010 km3 |
Equatorial Radius (Defined by Pressure = 1 bar) |
60 268 km |
Polar Radius (Defined by Pressure = 1 bar) |
54 364 km |
Volumetric Mean Radius |
58 232 km |
Ellipticity |
0.098 0 |
Mean Density |
687 kg m-3 |
Surface Gravity |
8.96 m s-2 |
Escape Velocity |
35.5 km s-1 |
GM |
37.931 × 106 km3 s-2 |
Bond Albedo |
0.75 |
Visual Geometric Albedo |
0.47 |
Visual Magnitude |
-8.88 |
Solar Irradiance |
15.0 W m-2 |
Black-Body Temperature |
83.9 K |
Moment of Inertia |
0.210 I MR-2 |
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Orbital Parameters |
Semimajor Axis |
1 426.8 × 106 km |
Sidereal Orbit Period |
10 759.22 days |
Tropical Orbit Period |
10 746.94 days |
Perihelion |
1 347.6 × 106 km |
Aphelion |
1 506.4 × 106 km |
Synodic Period |
378.09 days |
Mean Orbital Velocity |
9.66 km s-1 |
Orbital Inclination |
2.484 ° |
Orbital Eccentricity |
0.054 15 |
Sidereal Rotation Period (System III Coordinates) |
10.500 hours |
Obliquity to Orbit |
26.73 ° |
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Observational Parameters |
Maximum Apparent Diameter from Earth |
20.1 arc seconds |
Minimum Apparent Diameter from Earth |
14.5 arc seconds |
Maximum Distance from Earth |
1 658.5 × 106 km |
Minimum Distance from Earth |
1 195.5 × 106 km |
Apparent Magnitude near Opposition |
0.7 |
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Atmospheric Parameters |
Surface Pressure |
More than 100 bars |
Average Temperature |
97 K |
Temperature at 1 bar |
134 K |
Scale Height |
59.6 km |
Wind Speeds (Under 30° lat.) |
Up to 400 m s-1 |
Wind Speeds (Over 30° lat.) |
Up to 150 m s-1 |
Mean Molecular Weight |
2.07 g mol-1 |
Hydrogen H2 |
|
89% |
Helium He |
|
11% |
Methane CH4 |
|
0.3% |
Ammonia NH3 |
|
0.02% |
Ethane C2H6 |
|
2 ppm |
Ammonia Ice |
|
Trace |
Water Ice |
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Trace |
Ammonia Hydrosulphide |
|
Trace |
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