Sedna, officially (90377) Sedna, is a small body of the Solar System, specifically a transneptunian object. In 2012 it was approximately three times farther from Sun than Neptune. For most of its orbit it is even farther from the Sun, with its aphelion estimated to be 960 AU (32 times the distance from Neptune), making it one of the farthest known objects in the Solar System, other than long period comets. Sedna's exceptionally long and elongated orbit, which takes about 11,400 years to complete, and its distant point of closest approach to the Sun, at 76 AU, have given rise to much speculation as to its origin. It was discovered in 2003 by Mike Brown, Chad Trujillo and David Rabinowitz. Sedna's name comes from the goddess of Eskimo mythology of the sea and marine animals.
