Makemake has one known satellite (S/2015 (136472) 1, nicknamed MK2). It has an extremely low average temperature, about 40 K (−230 °C), means its surface is covered with methane, ethane, and possibly nitrogen ices. Makemake was discovered on March 31, 2005 by a team led by Michael E. Its unofficial codename was Easterbunny, in honor of the fact that it was discovered just a few days past Easter. Makemake was named after the Rapanui god of fertility.