| Type | Open Cluster |
|---|---|
| Magnitude | Right Ascension | 17h 11' (2000) |
| Declination | 15° 28' N |
| Constellation | Hercules |
| Classification | III 1 p |
| 33 Ophiuchi | Alpha1 Herculis | Alpha2 Herculis |
| HD 154278 | HD 156653 | Rasalgethi |
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
A complete list of credits and sources can be found on the about page