northern skyBest Oct
Cepheus
The Kinggen. Cephei
- Brightest
- Alderamin
- Stars
- 150
- Best viewed
- October
- Sky center
- 325.0°, +70.0°
Alpha Cephei
in catalog
from mid-latitudes
RA / Dec
Live 3D view
150 stars
pinch · drag
α · Brightest
Alderamin
Mythology
King of Aethiopia, father of Andromeda, husband of Cassiopeia. Contains Delta Cephei — the prototype Cepheid variable whose period-luminosity relation lets astronomers measure intergalactic distances.
Brightest stars
top 8 of 150| Star | Bayer | Magnitude | B−V |
|---|---|---|---|
Alderamin | 5Alp Cep | 2.45 | 0.26 |
Errai | 35Gam Cep | 3.21 | 1.03 |
Alfirk | 8Bet Cep | 3.23 | -0.20 |
21Zet Cep | — | 3.39 | 1.56 |
3Eta Cep | — | 3.41 | 0.91 |
32Iot Cep | — | 3.50 | 1.05 |
27Del Cep | — | 4.07 | 0.78 |
23Eps Cep | — | 4.18 | 0.28 |
- Alderamin5Alp Cep2.45mag
- Errai35Gam Cep3.21mag
- Alfirk8Bet Cep3.23mag
- 21Zet Cep3.39mag
- 3Eta Cep3.41mag
- 32Iot Cep3.50mag
- 27Del Cep4.07mag
- 23Eps Cep4.18mag
Lower magnitude = brighter. B−V color index maps to star color (bluer cooler, redder warmer).