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Thebe (moon)

Discovered byS. Synnott
Discovered in1979
Orbital characteristics
Mean radius221,900 km
Revolution period16h 11.3m
Is a satellite ofJupiter
Physical characteristics
Equatorial diameter110(×90) km
Surface areakm2
Mass7.557×1017 kg
Mean density1.45 g/cm3
Surface gravity0.0201m/s2
Rotation period16h 11.3m
Axial tilt0.001°
Surface temp
Atmospheric pressure0 kPa

Thebe (pronounced "THEE bee") is the fourth of Jupiter's known satellites by distance from the planet. It was discovered by Voyager 1 and was first given the temporary name 1979J2. It was later named after a nymph who was the daughter of the river god Asopus. There appear to be at least three or four very large impact craters on the satellite (very large in the sense that each of these craters is roughly comparable in size to the radius of Thebe). Little else is known about it.

This image of Thebe was taken by NASA's Galileo spacecraft on January 4, 2000, at a range of 193,000 kilometers (about 120,000 miles).