Ganymede

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Ganymede
Ganymede is the largest moon of Jupiter and in the Solar System, and the only moon known to have a magnetosphere. It is the seventh satellite outward from Jupiter and third of the Galilean moons, the first group of objects discovered orbiting another planet. Ganymede orbits Jupiter in roughly seven days and is in a 1:2:4 orbital resonance with the moons Europa and Io, respectively. At 2.02 times the mass of the Moon, it is the most massive planetary satellite. It is the ninth-largest object in the Solar System, and the largest without a substantial atmosphere. Ganymede is composed of approximately equal amounts of silicate rock and water ice. It is a fully differentiated body with an iron-rich, liquid core, and an internal ocean that may contain more water than all of Earth's oceans combined. Ganymede (moon) - Wikipedia, the free encyclopedia
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Short Description Ganymede is the largest moon of Jupiter and in the Solar System, and the only moon known to have a magnetosphere. It is the seventh satellite outward from Jupiter and third of the Galilean moons, the first group of objects discovered orbiting another planet. Ganymede orbits Jupiter in roughly seven days and is in a 1:2:4 orbital resonance with the moons Europa and Io, respectively. At 2.02 times the mass of the Moon, it is the most massive planetary satellite. It is the ninth-largest object in the Solar System, and the largest without a substantial atmosphere. Ganymede is composed of approximately equal amounts of silicate rock and water ice. It is a fully differentiated body with an iron-rich, liquid core, and an internal ocean that may contain more water than all of Earth's oceans combined. Ganymede (moon) - Wikipedia, the free encyclopedia
Discovered by Galileo Galilei
Discovery date January 7, 1610
Type Moon
AddInfo Jupiter III
Satellite of Jupiter
Orbit Prograde
Rotation Synchronous
Magnetosphere Intrinsic
Atmosphere Trace
Shape Equilibrium spheroid
Geological activity In the past
Hydrosphere Internal
Apoapsis 07 1 071 600 km
Periapsis 07 1 069 200 km
Semi-major axis 07 1 070 400 km
Distance from Sun 01 5.202 60 au /07
Eccentricity 0.001 3
Orbital period 7.154 552 96 days
Orbital speed 02 10.880 km/s
Inclination to the ecliptic 002.214°
Inclination to the equator 000.20°
Diameter/Size 04 5 268.2 ± 0.6 km | 0.413 Earths
Mass 1023×1.481 9 kg | 0.025 Earths
Density 01 1.936 g/cm3
Surface gravity 01 1.428 m/s2 | 0.146 g
Escape velocity 04 2 741 m/s
Rotation period 7.154 552 96 days
Axial tilt 0–000.33°
Albedo geometric 0.43 ± 0.02
Temperature min 02 70 K
Temperature mean 03 110 K
Temperature max 03 152 K
Apparent magnitude 4.61 (opposition)
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