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Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cepheus |
Right ascension | 20h 37m 21.5449s |
Declination | +75° 36′ 01.456″ |
Apparent magnitude (V) | 7.38 |
Characteristics | |
Spectral type | G5V/G8V/?K3V/?M5V |
Astrometry | |
Distance | 90.95 ly (27.9[2] pc) |
Details | |
Mass | 1.21/0.22/0.75/0.19? M☉ |
Radius | 0.9/0.55/0.77/0.23? R☉ |
Luminosity | 0.66/0.17/0.26/0.0038? L☉ |
Temperature | ≈5500/5000/≈4700/≈3000 K |
Orbit | |
Period (P) | 0.0007625 yr |
Semi-major axis (a) | 0.0083AUs″ |
Eccentricity (e) | 0 (fixed) |
Other designations | |
Database references | |
SIMBAD | data |
VW Cephei (VW Cep) is an eclipsing contact binary of W Ursae Majoris-type located roughly at 90.6 light years from the Sun, whose two component stars share a common outer layer. Because the two components share their outer layers, as the components of W Ursae Majoris do, they have the same stellar classification, and are classified as yellow G-type main sequence dwarfs. The components take 0.2783 days (roughly 6.7 hours) to revolve around a common barycentre. Orbital period variations suggest the presence of one more additional perturbing objects of likely low-mass stellar nature.