The Butterfly Cluster (cataloged as Messier 6 or M6, and as NGC 6405) is an open cluster of stars in the southern constellation of Scorpius. Its name derives from the resemblance of its shape to a butterfly.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/astronomy/catalogs/messier/messier-6/en.wikipedia.org.md
This evening I paid my respects to the lords of the country. There were also some distinguished Americans among their number. “Gen. Taylor” showed a letter of recommendation he had received from Moses16, post collector; “John C. Calhoun” sold to us a pretty little canoe for the sum of $5.50 which we proposed to use as a tender to our launch in shallow water. The “Duke of Clarence” has stretched my bearskin for me.