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 | Puppis |
| Magnitude | 8.3 |
| Size | 8.0' x 8.0' |
Number 102 in the Herschel 400 list is NGC 2421. This is a moderate sized open cluster in Puppis, consisting mostly of fairly faint stars. It is almost lost against the background of massed Milky Way stars.