Messier 46
Messier 46 or M46 , also known as NGC 2437 , is an open cluster of stars in the slightly southern constellation of Puppis . 
<triplet> Messier 46 <subj> open cluster <obj> instance of <subj> Puppis <obj> constellation <triplet> constellation <subj> southern <obj> part of <triplet> Puppis <subj> constellation <obj> instance of