Westerlund 1 W26
Star in the constellation Ara / From Wikipedia, the free encyclopedia
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Westerlund 1 W26 (commonly abbreviated to W26) or Westerlund 1 BKS AS is a red supergiant located at the outskirts of the Westerlund 1 super star cluster. It is one of the largest known stars and the most luminous supergiant stars discovered so far with radius calculated to be in excess of a thousand times the solar radius, and a luminosity of over 200,000 times the solar luminosity. If placed at the center of the Solar System, its photosphere would engulf the orbit of Jupiter.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ara |
Right ascension | 16h 47m 05.403s[1] |
Declination | −45° 50′ 36.76″[1] |
Apparent magnitude (V) | 17.194[2] |
Characteristics | |
Spectral type | M0.5–M6[3] (M2-M6Ia[4]) |
Apparent magnitude (B) | 22.1[5] |
Apparent magnitude (J) | 4.31[1] |
Apparent magnitude (H) | 1.35[1] |
Apparent magnitude (K) | 1.9[6] |
B−V color index | +4.906[2][5] |
Astrometry | |
Radial velocity (Rv) | -49.42 km/s |
Proper motion (μ) | RA: -1.841[7] mas/yr Dec.: -3.909[7] mas/yr |
Distance | 14,200 ly (4,350[3] pc) |
Details | |
Radius | 1,145–1,240[3] R☉ |
Luminosity | 276,000±10,000[3] L☉ |
Temperature | 3,782±14[3] K |
Age | 7.9[3] Myr |
Other designations | |
Westerlund 1 W26, W1–26, 2MASS J16470540-4550367, Westerlund 1 BKS AS, Westerlund 1 BKS A, Gaia EDR3 5940106041452150272 | |
Database references | |
SIMBAD | data |
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