NGC 6645 (H2309)
NGC 6645 (H2309) is a open cluster located in the constellation of Sagittarius. The Herchel 2500 is a catalog of nebulae, star clusters, and galaxies. Here are the key stats on NGC 6645:
| Herschel: | H2309 |
| NGC/IC: | NGC 6645 |
| Herschel: | H 6. 23 |
| Type: | open cluster |
| Magnitude: | 8.5 |
| Right Ascension: | 18:32.6 |
| Declination: | -16:54 |
| Constellation: | Sagittarius |
| Size (arc-minutes): | 10 |