PV Cephei

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]
Distance1,120 ± 20 ly
(344 ± 7 pc)
Details
Mass2.6[7] M☉
Radius2.9[7] R☉
Luminosity1[8] - 100[3] L☉
Temperature8,150[8] K
Age<1[3] Myr
Database references
SIMBADdata

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'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]

  1. ^ Cite error: The named reference esa/hubble was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference 2mass was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference kun2011 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference vsx was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference dr2 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference caratti was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference vioque was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Saha was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Lorenzetti was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Cohen was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Kholopov was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Harrington was invoked but never defined (see the help page).