M12 Globular Cluster Messier 12 Post author:ScottH Post published:May 23, 2014 Post category:Messier List / Star Clusters Messier 12 is located in the constellation of Ophiuchus (pronounced O – fee – u – cus). I was initially discovered by famed comet hunter Charles Messier in 1764. Under fairly dark skies this cluster of stars can be seen with binoculars. You Might Also Like The Trifid Nebula August 9, 2010 Omega Centauri April 27, 2020 Messier 23 May 26, 2017