WR 124
Star in the constellation Sagitta / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about QR Sagittae?
Summarize this article for a 10 year old
WR 124 is a Wolf–Rayet star in the constellation of Sagitta surrounded by a ring nebula of expelled material known as M1-67.[9] 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.[10] It is listed in the General Catalogue of Variable Stars as QR Sagittae with a range of 0.08 magnitudes.[5] NASA's James Webb Space Telescope has captured detailed infrared images of WR 124,[11] revealing significant dust production and offering new insights[12] into the life cycles of massive stars and their contributions to the cosmic dust budget.
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Sagitta |
Right ascension | 19h 11m 30.875s[1] |
Declination | +16° 51′ 38.20″[1] |
Apparent magnitude (V) | 11.50±0.11[2] |
Characteristics | |
Spectral type | WN8h[3] |
Apparent magnitude (B) | 12.19±0.16[2] |
Apparent magnitude (J) | 8.578±0.024[4] |
Apparent magnitude (H) | 8.179±0.018[4] |
Apparent magnitude (K) | 7.732±0.018[4] |
B−V color index | 0.69[2] |
Variable type | Eruptive (WR)[5] |
Astrometry | |
Radial velocity (Rv) | 190±7.4[6] km/s |
Proper motion (μ) | RA: −2.517±0.012[1] mas/yr Dec.: −5.671±0.012[1] mas/yr |
Parallax (π) | 0.1568 ± 0.0140 mas[1] |
Distance | 21,000 ± 2,000 ly (6,400 ± 600 pc) |
Absolute magnitude (MV) | −6.58[7] |
Details | |
Mass | 20[7] M☉ |
Radius | 11.93[7] R☉ |
Luminosity | 562,000[7] L☉ |
Temperature | 44,700[7] K |
Age | 8.6[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |