PV Cephei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cepheus |
| Right ascension | 20h 45m 53.943s |
| Declination | +67° 57′ 38.66″ |
| Apparent magnitude (V) | 14.58 - 18.08 |
| Characteristics | |
| Spectral type | A5Ve |
| Variable type | T Tau |
| Astrometry | |
| Proper motion (μ) | RA: 8.228 mas/yr Dec.: −1.976 mas/yr |
| Parallax (π) | 2.9100±0.0593 mas |
| Distance | 1,120 ± 20 ly (344 ± 7 pc) |
| Details | |
| Mass | 2.6 M☉ |
| Radius | 2.9 R☉ |
| Luminosity | 1 - 100 L☉ |
| Temperature | 8,150 K |
| Age | <1 Myr |
| Database references | |
| SIMBAD | data |
PV Cephei is a variable star of Orion type located in the constellation of Cepheus at a distance of about 1,100 light-years from Earth. In visible light it varies in brightness from magnitude 17 to 19, making it far too faint to be seen by the naked eye.
PV Cephei's variability was first detected by Martin Cohen, Leonard Vello Kuhi and Eugene A. Harlan, and was announced in 1977. It was given its variable star designation in 1978. The star is embedded within Gyulbudaghian's Nebula, a reflection nebula. As the star's brightness changes, the nebula's shape changes dramatically.