S Doradus
Star in the Large Magellanic Cloud / From Wikipedia, the free encyclopedia
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S Doradus (also known as S Dor) is one of the brightest stars in the Large Magellanic Cloud (LMC), a satellite galaxy of the Milky Way, located roughly 160,000 light-years away. The star is a luminous blue variable, and one of the most luminous stars known, having a luminosity varying widely above and below 1,000,000 times the luminosity of the Sun, although it is too far away to be seen with the naked eye.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Dorado |
Right ascension | 05h 18m 14.3572s[1] |
Declination | −69° 15′ 01.148″[1] |
Apparent magnitude (V) | 8.6 – 11.5[2] |
Characteristics | |
Spectral type | B8/9eq – F0/5:Iae[3] |
U−B color index | –0.98[4] |
B−V color index | +0.11[4] |
Variable type | S Doradus[2] |
Astrometry | |
Radial velocity (Rv) | +228[5] km/s |
Proper motion (μ) | RA: 1.735[1] mas/yr Dec.: 0.280[1] mas/yr |
Parallax (π) | 0.0073 ± 0.0371 mas[1] |
Distance | 169,000 ly (51,800 pc) |
Absolute magnitude (MV) | –7.6 (1965) –10.0 (1989)[6] |
Details | |
Mass | 24+16 −2[7] M☉ |
1989 (maximum) | |
Radius | 380[8] R☉ |
Luminosity | 910,000[6] L☉ |
Surface gravity (log g) | 0.6[8] cgs |
Temperature | 8,500[6] K |
1985 (minimum) | |
Radius | 100[8] R☉ |
Luminosity | 1,400,000[8] L☉ |
Surface gravity (log g) | 1.6[8] cgs |
Temperature | 20,000[8] K |
1965 (deep minimum) | |
Luminosity | 2,000,000[6] L☉ |
Temperature | 35,000[6] K |
Other designations | |
Database references | |
SIMBAD | data |
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