The nebula is likely associated with three nearby [[open star cluster]]s. NGC 6989, discovered by [[William Herschel]] in 1790, is located in the North-West region of the nebula.<ref name=seds/> Near NGC 6989 is NGC 6996, discovered by [[John Herschel]] in 1833. NGC 6997, discovered by [[William Herschel]] in 1786, is situated on the western side of the nebula. | The nebula is likely associated with three nearby [[open star cluster]]s. NGC 6989, discovered by [[William Herschel]] in 1790, is located in the North-West region of the nebula.<ref name=seds/> Near NGC 6989 is NGC 6996, discovered by [[John Herschel]] in 1833. NGC 6997, discovered by [[William Herschel]] in 1786, is situated on the western side of the nebula. |