Dwarf planet Makemake with its moon MK 2
NASA/ESA
<a rel="nofollow" class="external free" href="https://www.nasa.gov/feature/goddard/2016/hubble-discovers-moon-orbiting-the-dwarf-planet-makemake">https://www.nasa.gov/feature/goddard/2016/hubble-discovers-moon-orbiting-the-dwarf-planet-makemake</a>