Westerlund 1-243

Westerlund 1-243
Westerlund 1 super star cluster. The location of Wd 1-243 is circled.
Credit: ESO
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 16h 47m 7.5041s[1]
Declination −45° 52′ 29.123″[1]
Apparent magnitude (V) 15.807[2]
Characteristics
Spectral type A3Ia+[3]
Apparent magnitude (J) 6.407[4]
Apparent magnitude (H) 5.271[4]
Apparent magnitude (K) 4.632[4]
Astrometry
Proper motion (μ) RA: −1.574[1] mas/yr
Dec.: −4.036[1] mas/yr
Parallax (π)0.0119 ± 0.0812 mas[1]
Distance13,400 ly
(4,120[5] pc)
Details[3]
Mass40 M☉
Radius376.9 R☉
Luminosity730,000 L☉
Surface gravity (log g)~0.65 cgs
Temperature~8,500 K
Rotational velocity (v sin i)10 km/s
Age10.4+1.3
−1.2[5] Myr
Other designations
Westerlund 1 W 243, Westerlund 1 BKS G, 2MASS J16470749-4552290, Gaia DR3 5940105830990286208
Database references
SIMBADdata

Westerlund 1-243 or Wd 1-243 is a luminous blue variable (LBV) star undergoing an eruptive phase located within the outskirts of the super star cluster Westerlund 1.[6] Located about 13,400 ly (4,100 pc) from Earth,[5] it has a luminosity of 0.73 million L☉ making it one of the most luminous stars known.[3]

  1. ^ a b c d e Cite error: The named reference DR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference lim was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference ritchie was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference 2MASS was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference beasor was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference clark was invoked but never defined (see the help page).