Sh 2-19
Sh 2-19 is an emission nebula in the constellation Sagittarius. It is part of the Sharpless Catalog assembled by Stewart Sharpless. It lies next to Sh 2-18. It contains the open cluster Ruprecht 131.
Ruprecht 131 appears smaller than the nebula, with an apparent size of only 7' compared to the nebula's 12'.