Adrastea 

Adrastea, the second innermost satellite of Jupiter was discovered by D. Jewitt and E. Danielson in 1979. The satellite along with Metis lies within Jupiter's main ring and could be the source of the material found in the ring. Because of its closeness to Jupiter, very little is known about this moon. In Greek mythology, Adrastea is the daughter of Jupiter and nanke who is responsible for distributing rewards and punishments.

Physical Data Key Mass Mass Mass Mass compared to that of Earth. Radius Radius Radius Radius compared to that of Earth. Mean Density Average Density. Distance Distance to the planet's center. Magnitude The brightness of a star or object.

Orbital Data Key Rotational Period Number of days to make one complete rotation. Orbital Period Number of days to obital the planet. Mean Orbital Velocity Average obital speed. Orbital Eccentricity Eccentricity. Orbital Inclination The tilt of the moon or planet. Escape Escape Velocity. Albedo Visual geometric albedo.