Combination of 15, 1 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
| Object Type | Open Cluster |
| Constellation | Monoceros |
| Magnitude | 7.6 |
| Size | 12.0' x 12.0' |
Number 110 in the Herschel 400 list is NGC 2506. This is a fairly large and rich cluster in Monoceros. The cluster is quite bright although most of its constituent stars are rather faint.