WR 111

WR 111
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sagittarius
Right ascension 18h 08m 28.46870s[1]
Declination −21° 15′ 11.1844″[1]
Apparent magnitude (V) +7.82[2]
Characteristics
Evolutionary stage Wolf-Rayet[3]
Spectral type WC5[3]
U−B color index −0.38[2]
B−V color index −0.28[2]
Astrometry
Proper motion (μ) RA: 0.293±0.129[4] mas/yr
Dec.: −1.527±0.107[4] mas/yr
Parallax (π)0.5826 ± 0.0759 mas[4]
Distance1,630+320
−230[5] pc
Absolute magnitude (MV)−4.26[6]
Details
Semi-empirical model
Mass13.0[6] M☉
Radius1.99[6] R☉
Luminosity245,000[6] L☉
Temperature89,000[6] K
Hydrodynamical model
Mass13.63[7] M☉
Radius0.905[7] R☉
Luminosity282,000[7] L☉
Temperature140,000[7] K
Age4.2[8] Myr
Other designations
WR 111, HD 165763, HIP 88856, BD−21°4864, Hen 3-1599, 2MASS J18082846-2115113
Database references
SIMBADdata

WR 111 (HD 165763) is a Wolf-Rayet (WR) star in the constellation Sagittarius. It is magnitude 7.8 and lies about 5,150 light-years away. It is one of the brightest and most closely studied WR stars.

  1. ^ a b Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference ducati was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference michaux was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference dr2 was invoked but never defined (see the help page).
  5. ^ Crowther, Paul A.; Rate, Gemma (2020). "Unlocking Galactic Wolf–Rayet stars with Gaia DR2 – I. Distances and absolute magnitudes". Monthly Notices of the Royal Astronomical Society. 493 (1): 1512–1529. arXiv:1912.10125. Bibcode:2020MNRAS.493.1512R. doi:10.1093/mnras/stz3614. S2CID 209444955.
  6. ^ a b c d e Cite error: The named reference wc was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference grafener was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference tetzlaff was invoked but never defined (see the help page).