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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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