Jupiter has 63 moons, as of August 2010, of which fifty have been named. A 64th is under investigation. Only eleven of Jupiter's moons are more than 50 km in diameter, and 37 are less than 10 km across; some very small moons. Apart from the four Galilean moons, they fall into one of a number of groups of related satellites; these appear on the menu above. Alternatively, select an individual moon from the alphabetical list of the fifty named moons below.