WR 147
WR 147 is a multiple star system in the constellation of Cygnus. The system is extremely reddened by interstellar extinction – that is, dust in front of the star scatters much of the blue light coming from WR 147, leaving the star appearing reddish.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 36m 43.632s |
| Declination | +40° 21′ 07.44″ |
| Apparent magnitude (V) | 13.86 + 16.02 |
| Characteristics | |
| WR | |
| Evolutionary stage | Wolf-Rayet star |
| Spectral type | WN8h |
| B−V color index | +4.06 |
| OB | |
| Spectral type | B0.5V |
| B−V color index | +4.09 |
| Astrometry | |
| Proper motion (μ) | RA: −1.417 mas/yr Dec.: −5.737 mas/yr |
| Parallax (π) | 0.5014 ± 0.0797 mas |
| Distance | 2100±200 ly (630±70 pc) |
| Absolute magnitude (MV) | −7.22 |
| Details | |
| WR 147S (WR) | |
| Mass | 51 M☉ |
| Radius | 29.8 R☉ |
| Luminosity | 1,995,000 L☉ |
| Temperature | 39,800 K |
| WR 147N (OB) | |
| Radius | 9.18 R☉ |
| Luminosity | 50,000 L☉ |
| Temperature | 28,500 K |
| Other designations | |
| Database references | |
| SIMBAD | WR 147 |
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