Return to Thebe (thing)

Discovered by            Stephen Synnott
Date of Discovery        [1980]
Distance from [Jupiter]    222,000 km
[Radius]                   55 x 45 km
[Mass]                     8 × 10^20 g
[Orbital Eccentricity]     0.015
[Orbital Inclination]      0.8°
[Orbital Period]           0.6745 day
[rotation|Rotational] Period        [Synchronous]
[Density] ([gram|g]/[centimeter|cm]3)          [???]
[Mean] Orbital [Velocity]    9.70 km/s

One of the four closest [moon|moons] of Jupiter, orbiting within the circuit of [Io]. The others are [Metis], [Adrastea], and [Amalthea]. Due to their small size, they appear to be [immune] to the powerful tidal forces of Jupiter's formidable [gravity]. Larger bodies would be pulled apart. Poor Thebe has been repeatedly battered by speeding meteors racing towards Jupiter, and dust from these impacts is believed to be the source of Jupiter's [Gossamer] ring.

The same side of Thebe always faces Jupiter, as its rotation about its [axis] occurs once per [revolution] as our moon does. Thebe and Almathea are luckier than their [sister] moons, Metis and Adrastea. Those two will eventually be pulled into Jupiter because they are within the synchronous orbit radius.

This moon was discovered thanks to [imagery] from [voyager|Voyager 1]. The [Galileo] probe also snapped some nice pictures in 2000.