S/2015 (136472) 1

Common card · No. 374773

S/2015 (136472) 1, unofficially nicknamed MK 2 by the discovery team, is the only known moon of Makemake, a dwarf planet located in the Kuiper belt. It is a dark object about 175 km (110 mi) in diameter, orbiting 22,250 km (13,800 mi) away from Makemake with an orbital period of 18 days. Observations leading to its discovery occurred in April 2015, using the Hubble Space Telescope's Wide Field Camera 3, and its discovery was announced on 26 April 2016.

Read on Wikipedia · Image NASA, ESA, A. Parker and M. Buie (Southwest Research Institute), W. Grundy (Lowell Observatory), and K. Noll (NASA GSFC), Public domain