Jupiter’s Moon Adrastea
Jupiter’s Moon Adrastea — Adrastea [a-DRAS-tee-uh] is the second innermost known satellite of Jupiter.
Adrastea was the daughter of Jupiter and Ananke and the distributor of rewards and punishments. Adrastea and Metis lie within Jupiter’s main ring and may be the source of material for the ring. Very little is known about Adrastea.
Discovered by D. Jewitt & E. Danielson
Date of discovery 1979
Mass (kg) 1.91e+16
Mass (Earth = 1) 3.1961e-09
Radius (km) 12.5x10x7.5
Radius (Earth = 1) 1.9599e-03
Mean density (gm/cm^3) 4.5
Mean distance from Jupiter (km) 128,971
Rotational period (days) ?
Orbital period (days) 0.298260
Mean orbital velocity (km/sec) 31.45
Orbital eccentricity 0.0000
Orbital inclination (degrees) 0.0000
Escape velocity (km/sec) 0.0143
Visual geometric albedo 0.05
Magnitude (Vo) 19.1