Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cepheus [1] |
Right ascension | 20h 45m 53.943s [2] |
Declination | +67° 57′ 38.66″ [2] |
Apparent magnitude (V) | 14.58 - 18.08 [3] |
Characteristics | |
Spectral type | A5Ve [4] |
Variable type | T Tau [5] |
Astrometry | |
Proper motion (μ) | RA: 8.228 [6] mas/yr Dec.: −1.976 [6] mas/yr |
Parallax (π) | 2.9100±0.0593 mas [6] |
Distance | 1,120 ± 20 ly (344 ± 7 pc) |
Details | |
Mass | 2.6 [7] M☉ |
Radius | 2.9 [7] R☉ |
Luminosity | 1 [8] - 100 [3] L☉ |
Temperature | 8,150 [8] K |
Age | <1 [3] 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. [9] In visible light it varies in brightness from magnitude 17 to 19, making it far too faint to be seen by the naked eye. [10]
PV Cephei's variability was first detected by Martin Cohen, Leonard Vello Kuhi and Eugene A. Harlan, and was announced in 1977. [11] It was given its variable star designation in 1978. [12] The star is embedded within Gyulbudaghian's Nebula, a reflection nebula. As the star's brightness changes, the nebula's shape changes dramatically. [11] [13]