Adrastea

Adrastea is the second innermost known satellite of Jupiter. Adrastea lies within Jupiter's main ring along with Metis, and may be the source of material for the ring.

Composition

Mass: 1.91e+16 kg
Radius: 12.5x10x7.5 km
Mean density: 4.5 gm/cm^3
Escape velocity: 0.0143 km/sec
Visual geometric albedo: 0.05

Orbital parameters

Mean orbital distance: 128,971 km
Orbital period: 0.298260 days
Mean orbital velocity: 31.45 km/sec
Orbital eccentricity: 0.0000
Orbital inclination: 0.0000 degrees