Makemake

Makemake is the third-largest known dwarf planet in the Solar System. Makemake was discovered on March 31, 2005, by a team at the Palomar Observatory, led by Michael Brown and was announced to the public on July 29, 2005. The discovery of Eris was made public the same day, following the announcement of Haumea two days earlier. The the might be methane and possibly nitrogen suggests that Makemake could have a atmosphere similar to Pluto.