Enceladus

Enceladus is in its elliptical orbit around Saturn.

330-mile-wide (530 kilometers)

Geysers on Saturn's Moon Enceladus (Cassini)

geysers blast material from Enceladus' subsurface ocean into space from the moon's south polar region

Cassini has found salts and carbon-containing organic compounds in the geyser spray, but that spacecraft was not designed to detect signs of life.

Link: http://www.space.com/31385-saturn-moon-enceladus-geysers-losing-steam.html