Eta Cygni
- Bayer:
- η Cyg
- Bayer Long
- Eta Cygni
- Flamsteed:
- 21 Cygni
- SAO:
- 69116
- HR:
- 7615
- HD:
- 188947
- DM:
- BD+34 3798
- GC:
- 27622
- Right Ascention:
- 19h 56m 18.385s
- Declination:
- +35° 5' 0.31"
- Magnitude:
- 4.0
- Spectral Type:
- K0III
- Constellation:
- Cygnus
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