W Cephei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 22h 36m 27.56307s |
| Declination | +58° 25′ 33.9554″ |
| Apparent magnitude (V) | 6.83 - 9.20 |
| Characteristics | |
| Evolutionary stage | Red supergiant + non-supergiant B class star |
| Spectral type | K0ep-M2ep Ia + B0/B1 |
| Variable type | SRc |
| Astrometry | |
| Radial velocity (Rv) | −44.64 km/s |
| Proper motion (μ) | RA: −3.176 mas/yr Dec.: −2.277 mas/yr |
| Distance | 2,427 pc |
| Absolute magnitude (MV) | −7 + −3.5 |
| Orbit | |
| Period (P) | 2,075 d |
| Eccentricity (e) | 0.149 |
| Inclination (i) | 90° |
| Details | |
| Radius | 670+20 −10 R☉ |
| Luminosity | 292,000 L☉ |
| Surface gravity (log g) | 0.18 cgs |
| Temperature | 3,681 – 4,400 K |
| Metallicity | 0.0205 |
| Other designations | |
| W Cep, BD+57°2568, HD 214369, HIP 111592, GSC 03995-00937, SAO 34614, PPM 40864, GC 31569, UCAC3 297-183471, IRAS 22345+5809, 2MASS J22362757+5825340, AAVSO 2232+57 | |
| Database references | |
| SIMBAD | data |
W Cephei is a spectroscopic binary and variable star located in the constellation Cepheus. It is thought to be a member of the Cep OB1 stellar association at about 8,000 light years.