2003 UB313 is currently the fifteenth-largest known Solar System object, with a diameter larger than those of Pluto and the neptunian moon Triton, but smaller than those of Earth's Moon and Titan, the largest of Saturn's satellites. Other objects, besides the eight undisputed major planets, that are larger than 2003 UB313 are Jupiter's satellites Callisto, Io, Europa (not pictured) and Ganymede (the largest moon in the Solar System). Behind Pluto, the next-largest known trans-neptunian objects are 2005 FY9, with a diameter of about 1,800 km, and Sedna (1,700 km). A handful more are larger than Ceres, the largest asteroid in the main asteroid belt between Mars and Jupiter. .