Callisto
MEAN RADIUS: 2404 km
MASS: 0.0179 (Earth=1)
DENSITY: 1.81 (gm/cm)
GRAVITY: 0.124 (Earth=1)
ORBIT PERIOD: 16.689 (Earth days)
ROTATION PERIOD: 16.689 (Earth days)
SEMIMAJOR AXIS OF ORBIT: 1,883,000 km
ECCENTRICITY OF ORBIT: 0.007