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 | Casseopia |
| Magnitude | 7.4 |
| Size | 8.0' x 8.0' |
Number 16 in the Herschel 400 list is NGC 457, a large and bright open cluster surrounding the star, Phi Casseopiae. Phi appears to be a foreground object rather than belonging to the cluster. Apart from Phi, the brightest stars appear to be "B" and "A" type giants, although there is one red supergiant visible.