Moon
Tethys
TypeMoon
Mass6.174 × 10²⁰ kg
Diameter1,062 km
Orbital Radius294,620 km
Orbital Period1.888 days
Rotation Period45.3 hours
Known Moons0
Surface Gravity0.145 m/s²
Average Temp-186 °C
AtmosphereNone
Discovered ByGiovanni Cassini
Discovery Year1684
About Tethys
Almost pure water ice, giving it the lowest density of any large moon. Ithaca Chasma, a canyon 2,000 km long, wraps three-quarters of the way around it. The crater Odysseus is 435 km wide. Trojan moons Telesto and Calypso ride 60 degrees ahead and behind it.
More Moons
Moon
Moon
Earth only natural satellite. Formed from debris after a Mars-sized body hit Ear...
384,400 km from its planetMoonPhobos
Mars larger moon, heavily cratered. Orbiting only 6,000 km above Mars surface an...
9,376 km from its planetMoonDeimos
Mars smaller and outer moon. Looks more like a smooth, lumpy potato than a spher...
23,460 km from its planetMoonIo
The most volcanically active body in the solar system. Over 400 active volcanoes...
421,700 km from its planet