Home Up


Jupiter through the Hubble Space Telescope Jupiter through an 8" Schmidt-Cassegrain

Planet Profile

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 in degrees)                             3.08

Orbit inclination (degrees)                                        1.3

Orbit eccentricity (deviation from circular)            0.048

Mean surface temperature (K)                120 (cloud tops)

Visual geometric albedo (reflectivity)                      0.44

Atmospheric components:    90% hydrogen, 10% helium, .07% methane

Rings:    Faint ring.  Infrared spectra imply dark rock fragments.


More information about Jupiter can be found by clicking here.