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Solar
Moon

Iapetus

Orbital elements

Semi-major axis
0.024 AU
Eccentricity
0.0286
Inclination
15.47°
Orbital period
79.3 days
Epoch · J2000
J2000

Physical properties

Mean radius
735 km
Mass
1.806 × 10²¹ kg
Density
1.088 g/cm³

Visual & observation

Geometric albedo
0.05

Discovery & classification

Discovered by
Giovanni Cassini
Discovery date
25 October 1671

Sources