| constellation = Cepheus
| dist_ly =
| dist_pc = 1,600 pc[3]
| appmag_v =
| radius_ly = 815[4]
| age =
| notes =
}}Cepheus OB1 is an OB association around the cluster NGC 7380. The region is approximately 1,600 parsecs from Earth in the constellation of Cepheus.
Cepheus OB1 contains dozens of O and B class stars, but the brightest members are cool supergiants such as HR 8752 and RW Cephei.[5]
Prominent stars| Star | Spectral type | Notes |
|---|
| RW Cephei | K2 O-Ia | Variable, one of the largest stars known |
| V354 Cephei | M2.5 Iab | Variable, one of the largest stars known |
| HR 8752 | G0 Ia0 | Yellow hypergiant |
| W Cephei | K0ep-M2ep Ia + B0/B1 | Binary |
| U Lacertae | M4epIab + B | Spectroscopic binary |
|
References
1. ^1 {{cite journal|bibcode=2001AstL...27...58D|title=Trigonometric Parallaxes and a Kinematically Adjusted Distance Scale for OB Associations|journal=Astronomy Letters|volume=27|pages=58|author1=Dambis|first1=A. K.|last2=Mel'Nik|first2=A. M.|last3=Rastorguev|first3=A. S.|year=2001|doi=10.1134/1.1336863}}
2. ^1 {{cite journal|bibcode=1992A&AS...94..211G|title=Galactic OB associations in the northern Milky Way Galaxy. I - Longitudes 55 deg to 150 deg|journal=Astronomy and Astrophysics Supplement Series|volume=94|pages=211|author1=Garmany|first1=C. D.|last2=Stencel|first2=R. E.|year=1992}}
3. ^1 {{Cite journal | doi = 10.1086/190559| title = Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way| year = 1978| last1 = Humphreys | first1 = R. M.| journal = The Astrophysical Journal Supplement Series| volume = 38| pages = 309| bibcode = 1978ApJS...38..309H}}