PV Cephei

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]

A red band light curve for PV Cephei, adapted from Lorenzetti et al. (2011)^[10]

PV Cephei

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 53.943s[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'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]