| Cepheus OB1 | |
| Epoch: | J2000.0 |
| Type: | OB association |
| Constellation: | Cepheus |
| Radius Ly: | 815 |
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.
| Star | Spectral type | Notes |
|---|---|---|
| K2 0-Ia | Variable, one of the largest stars known | |
| M2.5 Iab / M3.5 Ib | Variable, one of the largest stars known | |
| DH Cephei | O5.5 V / O6 V | Binary |
| G0 Ia-0 | Yellow hypergiant | |
| K0ep-M2ep Ia + B0/B1 | Binary | |
| M4epIab + B | Spectroscopic binary | |
| WR 152 | WN3(h) | Wolf–Rayet star |