Messier 6 - The Butterfly Cluster

moreDescription:

History of Observation:

"In the same night of May 23 to 24, 1764, I have determined the position of a cluster of small stars between the bow of Sagittarius and the tail of Scorpius: At simple view [with the naked eye], this cluster appears to form a nebula without stars, but the slightest instrument which one employs to examine it makes one see that it is nothing but a cluster of small stars. Lacaille has it."

Locating Messier 6: