Jupiter Facts

Discoverer:		Unknown
Spacecraft Encounter(s):		Pioneer 10 & 11 (1973, 1974) Voyager 1 & 2 (1979) Galileo (1995 - present) Cassini - Huygens (2000-2001)
Mean distance from the Sun:		5.203 AU (778,400,000 km/483,700,000 mi)
Length of Year:		11.86 years
Rotation Period:		9.92 hours
Mean Orbital Velocity:		13.06 km/s (8.1 mi/s)
Inclination of Axis:		3.12°
Diameter:		142,980 km/88,700 mi
Number of observed satellites:		16

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