BAT99-123
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| 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[3] |
| 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] |
| Distance | 50,000 pc |
| Details | |
| Mass | 7.7[3] M☉ |
| Radius | 0.47[3] R☉ |
| Luminosity | 158,500[3] L☉ |
| Temperature | 170,000[3] K |
| Other designations | |
| Brey 93, 2MASS J05393430-6844091 | |
| Database references | |
| SIMBAD | data |
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.
