Janus, moon

Janus is an inner satellite of Saturn. It is also known as Saturn X. It is named after the mythological Janus. Although the name was informally proposed soon after the initial 1966 CE discovery, it was not officially given this name until 1983, when Epimetheus also received its name.

Janus occupies practically the same orbit as the moon Epimetheus. As with many of Saturn's moons, Janus is a very porous and icy rubble pile. The moon is also highly non-spherical. Being co-orbital with Epimetheus, Janus is also being mined by SII for its water ice and frozen gases.