HD 57682
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Monoceros |
| Right ascension | 07h 22m 2.05s |
| Declination | −08° 58′ 45.8″ |
| Apparent magnitude (V) | 6.42 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | O9.2IV |
| Astrometry | |
| Radial velocity (Rv) | +24.1 km/s |
| Proper motion (μ) | RA: +9.659 mas/yr Dec.: +13.159 mas/yr |
| Parallax (π) | 0.8968±0.0739 mas |
| Distance | 3,600 ± 300 ly (1,120 ± 90 pc) |
| Absolute magnitude (MV) | −4.4 |
| Details | |
| Mass | 17+19 −9 M☉ |
| Radius | 7.0+2.4 −1.8 R☉ |
| Luminosity | 79,433 L☉ |
| Surface gravity (log g) | 3.93 cgs |
| Temperature | 33,500 K |
| Rotation | ~63.5 days |
| Rotational velocity (v sin i) | 10 km/s |
| Age | 4.5 Myr |
| Other designations | |
| MCW 529, HD 57682, HIP 35707, HR 2806, SAO 134580, TIC 187458882, TYC 5395-4693-1, IRAS 07196-0852, 2MASS J07220205-0858457 | |
| Database references | |
| SIMBAD | data |
HD 57682 is a rare magnetic massive O-type main-sequence star star located in the constellation of Monoceros. It is one of only a small number of confirmed magnetic O-type stars and is notable for its strong dipolar magnetic field, which confines its stellar wind and produces observable spectroscopic variability.