HD 269810

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Stern
HD 269810
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Swordfish
Right ascension 5 h 35 m 13.9 s
declination -67 ° 33 ′ 27.5 ″
Apparent brightness 12.22 mag
Typing
B − V color index −0.14 
Spectral class O2 III (f *)
Astrometry
Radial velocity 300 km / s
parallax 0.029 ± 0.033  mas
Visual absolute brightness M vis −6.6 mag
Proper movement 
Rec. Share: 1.43 ± 0.06  mas / a
Dec. portion: 0.53 ± 0.07  mas / a
Physical Properties
Dimensions 130  M ☉
Luminosity

2.19 million  L ☉

Effective temperature 52,500  K
Other names
and catalog entries
Henry Draper Catalog HD 269810 [1]
Tycho catalog TYC 9162-101-1 [2]
2MASS catalog 2MASS J05351389-6733275 [3]

HD 269810 (or HDE 269810 ) is one of the most massive stars currently known. According to the current state of research (2018), its mass is approx. 130 M ☉ . HD 269810 resides in the NGC 2029 cluster in the Large Magellanic Cloud . When it was discovered in 1995, it was the most massive star ever discovered at that time, with an estimated 190 M ☉ .

Surname

The name HD 269810 is composed as follows:

  • HD : The star is listed in the Henry Draper catalog .
  • 269810 : a serial number from the expansion of the Henry Draper catalog from 1949.

The abbreviation HDE (HD extension) is sometimes used for stars in the number range 225301 to 359083 of the Henry Draper catalog .

Individual evidence

  1. ↑ a b c d e HD 269810. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed August 26, 2018 .
  2. ↑ a b c C. J. Evans, NR Walborn, PA Crowther, V. Hénault-Brunet, D. Massa, WD Taylor, ID Howarth, H. Sana, DJ Lennon, JT Van Loon: A Massive Runaway Star from 30 Doradus . In: The Astrophysical Journal Letters . 715, No. 2, June 2010, pp. L74-L79. arxiv : 1004.5402 . bibcode : 2010ApJ ... 715L..74E . doi : 10.1088 / 2041-8205 / 715/2 / L74 .
  3. ^ A b N. R. Walborn, NI Morrell, ID Howarth, PA Crowther, DJ Lennon, P. Massey, JI Arias: A CNO Dichotomy among O2 Giant Spectra in the Magellanic Clouds . In: The Astrophysical Journal . 608, No. 2, June 2004, pp. 1028-1038. arxiv : astro-ph / 0403557 . bibcode : 2004ApJ ... 608.1028W . doi : 10.1086 / 420761 .
  4. ↑ http://hubblesite.org/newscenter/archive/releases/1995/27/text/