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WR 25
Binary star system in the constellation Carina / From Wikipedia, the free encyclopedia
WR 25 (HD 93162) is a binary star system in the turbulent star-forming region the Carina Nebula, about 6,800 light-years from Earth. It contains a Wolf-Rayet star and a hot luminous companion and is a member of the Trumpler 16 cluster. The name comes from the Catalogue of Galactic Wolf–Rayet Stars.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Carina |
Right ascension | 10h 44m 10.337s[1] |
Declination | −59° 43′ 11.41″[1] |
Apparent magnitude (V) | 8.80[2] |
Characteristics | |
Evolutionary stage | Wolf-Rayet star |
Spectral type | O2.5If*/WN6 + OB[3] |
Astrometry | |
Radial velocity (Rv) | −34.6[4] km/s |
Proper motion (μ) | RA: -6.918[5] mas/yr Dec.: 2.764[5] mas/yr |
Parallax (π) | 0.4450 ± 0.0203 mas[5] |
Distance | 1,970+180 −150[6] pc |
Absolute magnitude (MV) | –6.98[7] |
Orbit[4] | |
Period (P) | 207.85 days |
Semi-major axis (a) | 156 R☉ |
Eccentricity (e) | 0.50 |
Semi-amplitude (K1) (primary) | 44 km/s |
Details | |
WR | |
Mass | 98[7] M☉ |
Radius | 20.24[7] R☉ |
Luminosity (bolometric) | 2,400,000[7] L☉ |
Temperature | 50,100[7] K |
Other designations | |
Database references | |
SIMBAD | data |
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