NGC 6638
NGC 6638 is a globular cluster located in the constellation of Sagittarius. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 6638:
| NGC: | NGC 6638 |
| Type: | globular cluster |
| Constellation: | Sagittarius |
| V-mag (visual): | 9.68 |
| B-mag (blue): | 10.8 |
| Right Ascension: | 18:30:56.25 |
| Declination: | -25:29:47.10 |
| Major axis: | 4.2 ' |
| Radial velocity: | 9 km/s |
| Redshift: | 0.000029 |
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS