225088 Gonggong is a likely dwarf planet of the Solar System. It is a member of the scattered disc. It has a highly eccentric orbit. It is from 34–101 astronomical units (5.1–15.1 billion kilometers; 3.2–9.4 billion miles) from the Sun. It is the sixth-farthest known Solar System object. Gonggong was discovered in July 2007 by American astronomers Megan Schwamb, Michael Brown, and David Rabinowitz at the Palomar Observatory, and the discovery was announced in January 2009.