NGC 891
Caldwell 23
NGC 891 is a spiral galaxy located in the constellation of Andromeda. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 891:
| NGC: | NGC 891 |
| Common name: | Caldwell 23 |
| Type: | galaxy |
| Galaxy type: | spiral |
| Galaxy morph class: | Sb |
| Constellation: | Andromeda |
| Surface brightness: | 24.1 mag/arcsec2 |
| V-mag (visual): | 10.0 |
| B-mag (blue): | 10.8 |
| J-mag (IR): | 7.26 |
| H-mag (IR): | |
| K-mag (IR): | 6.36 |
| Right Ascension: | 02:22:33.41 |
| Declination: | 42:20:56.90 |
| Major axis: | 13.03 ' |
| Minor axis: | 3.03 ' |
| Angle (major axis): | 22° |
| Radial velocity: | 528 km/s |
| Redshift: | 0.001763 |
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS