Makemake

Makemake is the 4th Dwarf Planet from the sun. It is located in The Kuiper Belt, and the dwarf got a moon in 2015.

Overview
Makemake is a dark red dwarf planet and is the largest Kuiper Belt Object. In 2015, the red dwarf got it's first Moon called S/2015 (136472) 1, but was later nicknamed MK2. Makemake lacks the expected atmosphere that astronomers thought it would develop. It was believed that it would develop an atmosphere similar to that of Pluto, however when the dwarf planet passed in front of a bright 18th-magnitude star on 23rd April 2011, it was discovered that it lacks a gas envelope. If it did have an atmosphere, it would most likely be made up of methane and nitrogen. Besides Pluto, Makemake was the only dwarf planet bright enough to have possibly been detected by astronomer Clyde William Tombaugh, who discovered Pluto in 1930. As it happens, Makemake was positioned very close to the Milky Way at the time of his survey – making it almost impossible to discover Makemake against a dense background of stars. The extremely low temperature of the dwarf planet, about 30 K or −243.2 °C, means that the surface of Makemake is covered with methane, ethane, and possibly nitrogen ices.