Moon of Jupiter, one of the
Galeleian Moons.
Very interesting moon, see Evidence of Ocean on Europa. Could possibly contain some life forms smiliar to ones that exist in the oceans on Earth. If, if, if and if, of course, but the thought can keep you awake at night.
Discovery: Jan 7, 1610 by Galileo Galilei
Diameter (km): 3,138
Mass (kg): 4.8e22 kg
Mass (Earth = 1) 0.0083021
Surface Gravity (Earth = 1): 0.135
Mean Distance from Jupiter (km): 670,900
Mean Distance From Jupiter (Rj): 9.5
Mean Distance from Sun (AU): 5.203
Orbital period (days): 3.551181
Rotational period (days): 3.551181
Density (gm/cm3) 3.01
Orbit Eccentricity: 0.009
Orbit Inclination (degrees): 0.470
Orbit Speed (km/sec): 13.74
Escape velocity (km/sec): 2.02
Visual Albedo: 0.63
Subsolar Temperature (K): ?
Equatorial Subsurface Temperature (K): ?
Surface Composition: Water, Ice
Data from NASA