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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
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 °
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
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 Trace
Ammonia Hydrosulphide Trace
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