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Solar
Moon

Tethys

Orbital elements

Semi-major axis
0.002 AU
Eccentricity
0.0001
Orbital period
45.3 hours
Epoch · J2000
J2000

Physical properties

Mean radius
531 km
Mass
6.174 × 10²⁰ kg
Density
0.984 g/cm³

Visual & observation

Geometric albedo
1.229

Discovery & classification

Discovered by
Giovanni Cassini
Discovery date
21 March 1684

Sources