The Scattered Disc is a region of the Solar System whose innermost part overlaps the Kuiper Belt (at 30 AU from the Sun) to an unknown distance that could be a few hundred AU (so far, 460 AU) and also to other inclinations above and below the ecliptic. It contains an uncertain number of celestial bodies (about 90 have been discovered so far) known simply as scattered disk objects (SDO), and which are part of the transneptunian objects family. They are frozen bodies, made up of rock, metal and ice, some over 1,000 km in diameter, the first of which was discovered in 1995. The largest member of the group is the dwarf planet Eris, discovered in 2005.
