NGC 646
NGC 646 is a galaxy pair located in the constellation of Hydrus. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 646:
| NGC: | NGC 646 |
| Type: | galaxy pair |
| Constellation: | Hydrus |
| B-mag (blue): | 14.3 |
| Right Ascension: | 01:37:25.50 |
| Declination: | -64:53:47.00 |
| Major axis: | 1.51 ' |
| Minor axis: | 1.02 ' |
| Angle (major axis): | 121° |
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS