BAT99-123

BAT99-123
Observation data
Epoch J2000      Equinox J2000
Constellation Dorado
Right ascension 05h 39m 34.302s[1]
Declination −68° 44′ 09.16″[1]
Apparent magnitude (V) 15.204[2]
Characteristics
Evolutionary stage Wolf-Rayet
Spectral type WO3[3]
U−B color index −1.335[2]
B−V color index 0.422[2]
Astrometry
Proper motion (μ) RA: 1.718[1] mas/yr
Dec.: 0.876[1] mas/yr
Parallax (π)−0.0198 ± 0.055 mas[1]
Distance50,000 pc
Details
Mass7.7[3] M☉
Radius0.47[3] R☉
Luminosity158,500[3] L☉
Temperature170,000[3] K
Other designations
Brey 93, 2MASS J05393430-6844091
Database references
SIMBADdata

BAT99-123, also known as Brey 93, is a rare WO-type (oxygen sequence) Wolf–Rayet star located in the Large Magellanic Cloud, about 160,000 light years away in Dorado. BAT99-123 was the first WO star discovered in the LMC, and only 3 are known to exist in the galaxy, the other two being LH 41-1042 and LMC195-1.

BAT99-123 was first discovered in 1970, and identified as a star with strong OVI emission in 1971, alongside other WO stars like WR 102, WR 142 and SMC AB8.[4] Most stars with strong OVI emission known at the time were central stars of planetary nebulae.

  1. ^ a b c d e Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference bonanos was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference tramper was invoked but never defined (see the help page).
  4. ^ Sanduleak, N. (1971-03-01). "On Stars Having Strong O VI Emission". The Astrophysical Journal. 164: L71. Bibcode:1971ApJ...164L..71S. doi:10.1086/180694. ISSN 0004-637X.