Messier 39
Messier 39 or M39 , also known as NGC 7092 , is an open cluster of stars in the constellation of Cygnus , positioned two degrees to the south of the star Pi Cygni and around 9° east-northeast of Deneb . 
<triplet> Messier 39 <subj> open cluster <obj> instance of <subj> Cygnus <obj> constellation <triplet> Cygnus <subj> constellation <obj> instance of