S/2015 (136472) 1
S/2015 ( 136472 ) 1 , nicknamed MK2 by the discovery team , is the only known moon of the dwarf planet Makemake . 
<triplet> S/2015 (136472) 1 <subj> Makemake <obj> parent astronomical body <triplet> Makemake <subj> S/2015 (136472) 1 <obj> child astronomical body