Combination of 15, 1 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
| Object Type | Planetary Nebula |
| Constellation | Puppis |
| Magnitude | 10.8 |
| Size | 1.3' x 1.3' |
Silhoueted against the bright open cluster M 46 in Puppis, is number 105 in the Herschel 400 list, NGC 2438. It is a small but fairly bright planetary nebula that is a 10" telescope looks annular. Although the planetary appears to belong to M 46, it is in fact just a foreground object, being located only about half as far away.