Callisto

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Callisto
Callisto is the second-largest moon of Jupiter, after Ganymede. It is the third-largest moon in the Solar System and the largest object in the Solar System not to be properly differentiated. At 4821 km in diameter, Callisto has about 99% the diameter of the planet Mercury but only about a third of its mass. It is less affected by Jupiter's magnetosphere than the other inner satellites because of its more remote orbit, located just outside Jupiter's main radiation belt. Callisto (moon) - Wikipedia, the free encyclopedia
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Short Description Callisto is the second-largest moon of Jupiter, after Ganymede. It is the third-largest moon in the Solar System and the largest object in the Solar System not to be properly differentiated. At 4821 km in diameter, Callisto has about 99% the diameter of the planet Mercury but only about a third of its mass. It is less affected by Jupiter's magnetosphere than the other inner satellites because of its more remote orbit, located just outside Jupiter's main radiation belt. Callisto (moon) - Wikipedia, the free encyclopedia
Discovered by Galileo Galilei
Discovery date January 7, 1610
Type Moon
AddInfo Jupiter IV
Satellite of Jupiter
Orbit Prograde
Rotation Synchronous
Atmosphere Trace
Shape Equilibrium spheroid
Hydrosphere Internal
Apoapsis 07 1 897 000 km
Periapsis 07 1 869 000 km
Semi-major axis 07 1 882 700 km
Distance from Sun 01 5.202 60 au /08
Eccentricity 0.007 4
Orbital period 16.689 0184 days
Orbital speed 01 8.204 km/s
Inclination to the ecliptic 002.017°
Diameter/Size 04 4 820.6 ± 3.0 km | 0.378 Earths
Mass 1023×1.075 938 ± 0.000 137 kg | 0.018 Earths
Density 01 1.834 4 ± 0.003 4 g/cm3
Surface gravity 01 1.235 m/s2 | 0.126 g
Escape velocity 04 2 440 m/s
Rotation period 16.689 0184 days
Axial tilt
Albedo geometric 0.22
Temperature min 02 80 ± 5 K
Temperature mean 03 134 ± 11 K
Temperature max 03 165 ± 5 K
Apparent magnitude 5.65 (opposition)
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