Skip to content
Solar
Moon

Ganymede

Orbital elements

Semi-major axis
0.007 AU
Eccentricity
0.0013
Inclination
0.2°
Orbital period
7.2 days
Epoch · J2000
J2000

Physical properties

Mean radius
2,634 km
Mass
1.482 × 10²³ kg
Density
1.936 g/cm³
Rotation period
7.15 days
Surface gravity
1.43 m/s²

Visual & observation

Geometric albedo
0.43
Representative colour
#928677

Discovery & classification

Discovered by
Galileo Galilei
Discovery date
7 January 1610

Sources