S Doradus

S Doradus

S Doradus is the brightest individual star in NGC 1910, encircled by the lower "spiral arm". The bright star within the lower right nebulosity (N119) is R85.
Credit: ESO
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]
Distance169,000 ly
(51,800 pc)
Absolute magnitude (MV)–7.6 (1965)
–10.0 (1989)[6]
Details
Mass24+16
−2[7] M☉
1989 (maximum)
Radius380[8] R☉
Luminosity910,000[6] L☉
Surface gravity (log g)0.6[8] cgs
Temperature8,500[6] K
1985 (minimum)
Radius100[8] R☉
Luminosity1,400,000[8] L☉
Surface gravity (log g)1.6[8] cgs
Temperature20,000[8] K
1965 (deep minimum)
Luminosity2,000,000[6] L☉
Temperature35,000[6] K
Other designations
CD-69 295, HD 35343, CPD-69 356, IRAS 05182-6918, AAVSO 0518-69.
Database references
SIMBADdata

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.

  1. ^ a b c d e Cite error: The named reference dr2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference GCVS was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference mk was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference nicolet was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference rgcrv was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference vangenderen2001 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference lamers1998 was invoked but never defined (see the help page).
  8. ^ a b c d e f Cite error: The named reference lamers1995 was invoked but never defined (see the help page).