WR 147

WR 147
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 20h 36m 43.632s[1]
Declination +40° 21′ 07.44″[1]
Apparent magnitude (V) 13.86 + 16.02[2]
Characteristics
WR
Evolutionary stage Wolf-Rayet star
Spectral type WN8h[3]
B−V color index +4.06
OB
Spectral type B0.5V[3]
B−V color index +4.09
Astrometry
Proper motion (μ) RA: −1.417[1] mas/yr
Dec.: −5.737[1] mas/yr
Parallax (π)0.5014 ± 0.0797 mas
Distance2100±200 ly
(630±70[4] pc)
Absolute magnitude (MV)−7.22[5]
Details
WR 147S (WR)
Mass51[6] M☉
Radius29.8[6] R☉
Luminosity1,995,000[6] L☉
Temperature39,800[6] K
WR 147N (OB)
Radius9.18 R☉
Luminosity50,000[7] L☉
Temperature28,500[7] K
Other designations
IRAS 20349+4010, 1E 2034+40.1, 2E 4394, 2MASS J20364364+4021075
Database references
SIMBADWR 147

WR 147 is a multiple star system in the constellation of Cygnus. The system is extremely reddened by interstellar extinction – that is, dust in front of the star scatters much of the blue light coming from WR 147, leaving the star appearing reddish.

  1. ^ a b c d Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Niemela was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Zhekov2010a was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Churchwell was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Hamann was invoked but never defined (see the help page).
  6. ^ a b c d Sota, A.; Maíz Apellániz, J.; Morrell, N. I.; Barbá, R. H.; Walborn, N. R.; Gamen, R. C.; Arias, J. I.; Alfaro, E. J.; Oskinova, L. M. (2019). "The Galactic WN stars revisited. Impact of Gaia distances on fundamental stellar parameters". Astronomy & Astrophysics. A57: 625. arXiv:1904.04687. Bibcode:2019A&A...625A..57H. doi:10.1051/0004-6361/201834850. S2CID 104292503.
  7. ^ a b Cite error: The named reference Reimer was invoked but never defined (see the help page).