WR 102
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 45m 47.541s |
| Declination | −26° 10′ 27.78″ |
| Apparent magnitude (V) | 14.10 |
| Characteristics | |
| Evolutionary stage | Wolf–Rayet star |
| Spectral type | WO2 |
| B−V color index | +0.77 |
| Astrometry | |
| Proper motion (μ) | RA: +0.672 mas/yr Dec.: −0.059 mas/yr |
| Parallax (π) | 0.3421±0.0208 mas |
| Distance | 9,500 ± 600 ly (2,900 ± 200 pc) |
| Absolute magnitude (MV) | −1.46 |
| Details | |
| Mass | 16.1+1.7 −1.4 M☉ |
| Radius | 0.52 R☉ |
| Luminosity | 380,000 L☉ |
| Temperature | 200,000 K |
| Metallicity [Fe/H] | 0.0 dex |
| Other designations | |
| V3893 Sagittarii, LS 4368, ALS 4368, Sand 4 | |
| Database references | |
| SIMBAD | data |
WR 102 is a Wolf–Rayet star in the constellation Sagittarius, an extremely rare star on the WO oxygen sequence. It is a luminous and very hot star, highly evolved and close to exploding as a supernova.