Saturn · natural satellite

Tethys

Odysseus and Ithaca Chasma

The large Odysseus crater and the long Ithaca Chasma mark two major features of Tethys, documented by Voyager and Cassini.

Mean diameter: 1,062.2 km
Mean orbital distance: 295,000 km from centre
Orbital period: 1.888 Earth days

Tethys · NASA spacecraft imagery — NASA/JPL/Space Science Institute · Image source ↗

Compared with our Moon

Tethys · 1,062.2 km

Moon · 3,474.8 km

One diameter scale. Circle shapes compare volume-equivalent diameters; irregular moons are not spheres.

Orbit & discovery

Surface gravity: 0.146 m/s²
Discovery: 1684
Discoverer / team: G.D. Cassini
Provisional designation: —
JPL satellite ID: 603
Orbital eccentricity: 0.001
Inclination: 1.1 degrees

Inclination reference: Laplace. Mean-element epoch: 2000-01-01.5 TDB · SAT441.

Diameters use volume-equivalent mean radii, including for irregular bodies. Mean orbital elements describe an orbit; they are not live positions. Missing physical measurements remain unavailable.

Physical measurements & uncertainties

Mean radius · km: 531.10 ±0.60 [1]
GM · km³/s²: 41.21353 ±0.00031 [SAT441]
Density · g/cm³: 0.9840 ±0.0033 [*]

Missions in the Saturn system · 5 records

5 launches · 0 linked events

These records cover the planetary system. A system mission did not necessarily visit this moon. Dedicated targets are marked separately; programme events include the journey and briefings. Launch outcomes do not establish arrival, landing success or present spacecraft operation.

Dedicated targets only

PLANETARY SYSTEM · UPCOMING