NGC 581
NGC 581 is a open cluster located in the constellation Cassiopeia. Some key stats include:
| NGC: | NGC 581 |
| Messier: | M 103 |
| Type: | open cluster |
| Constellation: | Cassiopeia |
| V-magnitude (visual): | 7.4 |
| B-magnitude (blue): | 7.72 |
| Right Ascension: | 01:33:21.81 |
| Declination: | 60:39:28.80 |
| Major axis: | 4.5 ' |
| Radial velocity: | -46 km/s |
| Redshift: | -0.00015 |
Right Ascension units = HH:MM:SS.SS
Declination units = DD:MM:SS.SS
PN = planetary nebula