NGC 6644
NGC 6644 is a planetary nebula 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 6644:
| NGC: | NGC 6644 |
| Type: | planetary nebula |
| Constellation: | Sagittarius |
| V-mag (visual): | 10.7 |
| B-mag (blue): | 12.2 |
| J-mag (IR): | 11.5 |
| H-mag (IR): | |
| K-mag (IR): | 11.6 |
| Right Ascension: | 18:32:34.73 |
| Declination: | -25:07:45.70 |
| Major axis: | 0.04 ' |
| Radial velocity: | 194 km/s |
| Redshift: | 0.000647 |
| PN central star ID: | HD 170839 |
| PN star V-mag: | 15.6 |
| PN star B-mag: | 15.6 |
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS