WR 124
NIRCam and MIRI composite image by the James Webb Space Telescope (north is approximately towards top left) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagitta |
| Right ascension | 19h 11m 30.875s |
| Declination | +16° 51′ 38.20″ |
| Apparent magnitude (V) | 11.17 – 11.25 |
| Characteristics | |
| Evolutionary stage | Wolf–Rayet |
| Spectral type | WN8h |
| Apparent magnitude (B) | 12.19±0.16 |
| Apparent magnitude (J) | 8.578±0.024 |
| Apparent magnitude (H) | 8.179±0.018 |
| Apparent magnitude (K) | 7.732±0.018 |
| B−V color index | 0.69 |
| Variable type | Eruptive (WR) |
| Astrometry | |
| Radial velocity (Rv) | 190±7.4 km/s |
| Proper motion (μ) | RA: −2.517±0.012 mas/yr Dec.: −5.671±0.012 mas/yr |
| Parallax (π) | 0.1568±0.0140 mas |
| Distance | 21,000 ± 2,000 ly (6,400 ± 600 pc) |
| Absolute magnitude (MV) | −6.58 |
| Details | |
| Mass | 20 M☉ |
| Radius | 11.93 R☉ |
| Luminosity | 562,000 L☉ |
| Temperature | 44,700 K |
| Age | 8.6 Myr |
| Other designations | |
| Merrill's Star, Sh 2-80, Hen 2-427, QR Sagittae, HIP 94289, GSC 01586-00411 | |
| Database references | |
| SIMBAD | data |
WR 124 is a Wolf–Rayet star in the constellation of Sagitta surrounded by a ring nebula of expelled material known as M1-67. It is one of the fastest runaway stars in the Milky Way with a radial velocity around 200 km/s. It was discovered by Paul W. Merrill in 1938, identified as a high-velocity Wolf–Rayet star. In 1982, Anthony Moffat et al. discovered that WR 124 is a variable star. It was given its variable star designation, QR Sagittae, in 1985. It is listed in the General Catalogue of Variable Stars with a brightness range of 0.08 magnitudes.