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Solar
Moon

Callisto

Orbital elements

Semi-major axis
0.013 AU
Eccentricity
0.0074
Inclination
0.19°
Orbital period
16.7 days
Epoch · J2000
J2000

Physical properties

Mean radius
2,410 km
Mass
1.076 × 10²³ kg
Density
1.834 g/cm³
Rotation period
16.69 days
Surface gravity
1.24 m/s²

Visual & observation

Geometric albedo
0.22
Representative colour
#5C4F40

Discovery & classification

Discovered by
Galileo Galilei
Discovery date
7 January 1610

Sources