PV Cephei
Star in the constellation Cepheus
From Wikipedia, the free encyclopedia
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.[8] In visible light it varies in brightness from magnitude 17 to 19, making it far too faint to be seen by the naked eye.[9]
 PV Cep is the bright spot located at the edge of Gyulbudaghian’s Nebula Credit: ESA/Hubble & NASA. Acknowledgement: Alexey Romashin | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cepheus[1] |
| Right ascension | 20h 45m 53.954s[2] |
| Declination | +67° 57′ 38.68″[2] |
| Apparent magnitude (V) | 14.58 - 18.08[3] |
| Characteristics | |
| Spectral type | A5Ve[4] |
| Apparent magnitude (G) | 13.87±0.02[2] |
| Variable type | T Tau[5] |
| Astrometry | |
| Proper motion (μ) | RA: 8.108±0.057[2] mas/yr Dec.: −2.108±0.054[2] mas/yr |
| Parallax (π) | 2.8048±0.0392 mas[2] |
| Distance | 1,160 ± 20 ly (357 ± 5 pc) |
| Details | |
| Mass | 2.6[6] M☉ |
| Radius | 2.9[6] R☉ |
| Luminosity | 1[7] - 100[3] L☉ |
| Temperature | 8,150[7] K |
| Age | <1[3] Myr |
| Database references | |
| SIMBAD | data |
PV Cephei's variability was first detected by Martin Cohen, Leonard Vello Kuhi and Eugene A. Harlan, and was announced in 1977.[10] It was given its variable star designation in 1978.[11] The star is embedded within Gyulbudaghian's Nebula, a reflection nebula. As the star's brightness changes, the nebula's shape changes dramatically.[10][12]
