Ganymede
MEAN RADIUS: 2634 km
MASS: 0.0175 (Earth=1)
DENSITY: 1.93 (gm/cm)
GRAVITY: 0.145 (Earth=1)
ORBIT PERIOD: 7.155 (Earth days)
ROTATION PERIOD: 7.155 (Earth days)
SEMIMAJOR AXIS OF ORBIT: 1,070,00 km
ECCENTRICITY OF ORBIT: 0.002