Cepheus OB1 is an OB association around the cluster NGC 7380. The region is approximately 3,400 parsecs from Earth in the constellation of Cepheus, although many of its stars lie in neighboring constellations like Cassiopeia.
Cepheus OB1 contains dozens of O and B class stars, but the brightest members are cool supergiants and hypergiants such as V509 Cassiopeiae (HR 8752) and RW Cephei.
+ Prominent stars Star Spectral type Notes RW Cephei K2 0-Ia Variable, one of the largest stars known V354 Cephei M2.5 Iab / M3.5 Ib Variable, one of the largest stars knownDH CepheiO5.5 V / O6 VBinary HR 8752 G0 Ia-0 Yellow hypergiant W Cephei K0ep-M2ep Ia + B0/B1 Binary U Lacertae M4epIab + B Spectroscopic binary, one of the largest stars knownWR 152WN3(h)Wolf–Rayet star
References
External links Cepheus OB1