Sponsored by the Institute of Physics   Planets   Mercury   Venus   Earth   Mars   Jupiter     Rings     Io     Europa     Ganymede     Callisto     Metis     Adrastea     Amalthea     Thebe     S/1975 J1     Leda     Himalia     Lysithea     Elara     Ananke     Carme     Pasiphae     Sinope     S/1999 J1   Saturn   Uranus   Neptune   Pluto Asteroids Comets Constellations Sunrise and Sunset Times Moon Phases SI Units Symbols   Printer Version Astronomy Planets - Jupiter Bulk Parameters | Orbital Parameters Observational Parameters | Atmospheric Parameters Satellites   Bulk Parameters Mass 1 896.6 × 1024 kg Volume 143 128 × 1010 km3 Equatorial Radius (Defined by Pressure = 1 bar) 71 492 km Polar Radius (Defined by Pressure = 1 bar) 66 854 km Volumetric Mean Radius 69 911 km Ellipticity 0.0649 Mean Density 1 326 kg m-3 Surface Gravity (At Pressure = 1 bar) 23.12 m s-2 Escape Velocity 59.5 km s-1 GM 126.686 × 106 km3 s-2 Bond Albedo 0.70 Visual Geometric Albedo 0.52 Visual Magnitude -9.40 Solar Irradiance 51.0 W m-2 Black-Body Temperature 90.6 K Moment of Inertia 0.254 I MR-2 Orbital Parameters Semimajor Axis 778.4 × 106 km Sidereal Orbit Period 4 332.589 days Tropical Orbit Period 4 330.595 days Perihelion 740.6 × 106 km Aphelion 816.0 × 106 km Synodic Period 398.88 days Mean Orbital Velocity 13.07 km s-1 Orbital Inclination 1.305 ° Orbital Eccentricity 0.048 39 Sidereal Rotation Period (System III coordinates) 9.9250 hours Obliquity to Orbit 3.12 ° Observational Parameters Maximum Apparent Diameter from Earth 59.0 arc seconds Minimum Apparent Diameter from Earth 29.8 arc seconds Maximum Distance from Earth 968.1 × 106 km Minimum Distance from Earth 588.5 × 106 km Apparent Magnitude near Opposition -2.7 Atmospheric Parameters Surface Pressure More than 100 bars Average Temperature 129 K Surface Wind Speeds (Under 30° lat.) Up to 150 m s-1 Surface Wind Speeds (Over 30° lat.) Up to 40 m s-1 Mean Molecular Weight 2.22 g mol-1 Hydrogen H2 88% Helium He 11% Methane CH4 0.2% Ammonia NH3 0.02% Hydrogen Deuteride HD 20 ppm Ethane C2H6 5 ppm Water H2O 1 ppm Ammonia Ice Trace Water Ice Trace Ammonia Hydrosulphide Trace Satellites Galilean Satellites Io Ganymede Europa Callisto Lesser Satellites Metis Adrastea Amalthea Thebe Leda Himalia Lysithea Elara Ananke Carme Pasiphae Sinope   [ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ] Download | Shop | Contact | About   Page compiled: Wed Sep 05 18:37:58 GMT+01:00 2001