# Tethys

Tethys (Saturn III) is a moon of Saturn, discovered by Giovanni Cassini in 1684. It orbits Saturn every 45 hours and shines at about magnitude 10.2.

An icy moon split by a vast canyon; with Dione and Rhea, part of the trio a 4-inch scope shows.

Open AstroPilot to see where Tethys is next to Saturn tonight and how easy it is with your telescope. https://astropilot.space/object/tethys