Eris was discovered by the Palomar Observatory-based team of Mike Brown, Chad Trujillo, and David Rabinowitz on January 5, 2005 (YOLD 3171), from images taken on October 21, 2003 (YOLD 3169). The discovery was announced on July 29, 2005 (YOLD 3171). She is a trans-Neptunian object (TNO) native to a region of space beyond the Kuiper belt known as the scattered disc. Eris has one moon, Dysnomia; recent observations have found no evidence of further satellites. The current distance from the Sun is 96.7 AU, roughly three times that of Pluto. With the exception of some comets the pair are the most distant known natural objects in the Solar System.