Jupiter

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Olin Hall, Bradley University
Peoria, Illinois 

Mass (kg)........................................... 1.90 x 10^27
Diameter (km)....................................... 142,800
Mean density (kg/m^3) .............................. 1314
Escape velocity (m/sec)............................. 59500

Average distance from Sun (AU)...................... 5.203
Rotation period (length of day in Earth hours)...... 9.8
Revolution period (length of year) (in Earth years). 11.86

Obliquity (tilt of axis) (degrees).................. 3.08
Orbit inclination (degrees)......................... 1.3
Orbit eccentricity.................................. 0.048

Mean surface temperature (K)........................ 120 (cloud tops)

Visual geometric albedo............................. 0.44
Atmospheric components.............................. 90% hydrogen,
                                                     10% helium, 
                                                     .07% methane
Rings............................................... Faint ring.
                      Infrared spectra imply dark rock fragments.
(Information from the California Institute of Technology)

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