Sharpless Sh2-21
Sharpless Sh2-21 is an emission nebula located in the constellation of Sagittarius. Sh2-21 is from the Sharpless Catalog, which contains 313 emission nebulae found in the northern hemisphere. Here are some key stats on Sh2-21:
| Sharpless #: | Sh2-21 |
| Type: | HII region |
| Constellation: | Sagittarius |
| Brightness: | medium |
| Right Ascension: | 17h 52m |
| Declination: | -28° 54' |
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS