Combination of 15, 1 minute images.
SBIG ST-8XE CCD.
5" f/5 refractor at prime focus.
| Object Type | Open Cluster |
| Constellation | Sagittarius |
| Magnitude | 6.9 |
| Size | 27.0' x 27.0' |
M 23 is a large and very scattered cluster of moderately bright stars in Sagittarius.