Cosmic Scale
Tethys
Moon of Saturn · 294,619 km from Saturn
How big is Tethys?
Tethys is about 1,062 km across.
See Tethys in 3D, at true scale
Tethys is a mid-sized moon of Saturn made almost entirely of water ice. A huge crater covers much of one side, and a canyon system runs three-quarters of the way around it.
At a glance
| Diameter | 1,062 km |
|---|---|
| Mass | 6.17 × 10²⁰ kg |
| Diameter compared with Earth | 0.083 × Earth |
| Size | 1,062 km |
| Orbits | Saturn, every 1.9 days |
| Big crater | Odysseus, 450 km wide |
| Canyon | Ithaca Chasma, 2,000 km long |
Good to know
- It is one of the most reflective bodies in the Solar System.
- Its density is close to that of water, so it is almost pure ice.
- Two tiny moons, Telesto and Calypso, share its orbit.