21 Herculis
- Flamsteed:
- 21 Herculis
- SAO:
- 121568
- HR:
- 6111
- HD:
- 147869
- DM:
- BD+07 3164
- GC:
- 22058
- Right Ascention:
- 16h 24m 10.825s
- Declination:
- +6° 56' 53.55"
- Magnitude:
- 5.7
- Spectral Type:
- A2pSr:
- Constellation:
- Hercules
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