Cepheus OB1

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Cepheus OB1
NGC7380 Wizard nebula.jpg
NGC 7380 and Wizard nebula
Observation data (J2000.0 epoch)
Right ascension22h 29m 00s[1]
Declination+56° 36′ 00″[1]
Distance(1,600 pc[2])
Physical characteristics
See also: Open cluster, List of open clusters

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.[4]

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


  1. 1.0 1.1 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  2. Dambis, A. K.; Mel'Nik, A. M.; Rastorguev, A. S. (2001). "Trigonometric Parallaxes and a Kinematically Adjusted Distance Scale for OB Associations". Astronomy Letters 27: 58. Bibcode 2001AstL...27...58D. doi:10.1134/1.1336863.
  3. Garmany, C. D.; Stencel, R. E. (1992). "Galactic OB associations in the northern Milky Way Galaxy. I - Longitudes 55 deg to 150 deg". Astronomy and Astrophysics Supplement Series 94: 211. Bibcode 1992A&AS...94..211G.
  4. Humphreys, R. M. (1978). "Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way". The Astrophysical Journal Supplement Series 38: 309. Bibcode 1978ApJS...38..309H. doi:10.1086/190559.

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