HD 93250

Database links to HD 93250

Stern HD 93250
AladinLite
Observation dates equinox :  J2000.0 , epoch : J2000.0
Constellation	Keel of the ship
Right ascension	10 h 44 m 45.03 s
declination	-59 ° 33 ′ 54.7 ″
Apparent brightness	7.5 likes
Typing
Spectral class	O4 III (fc)
Astrometry
parallax	0.36 ± 0.03  mas
distance	9000 ± 1000  ly 2,800  pc
Physical Properties
Dimensions	118  M ☉
radius	18  R ☉
Luminosity	1.23 million  L ☉
Effective temperature	50500  K
Other names and catalog entries
Cordoba Survey CD −58 ° 3537 Henry Draper Catalog HD 93250 [1] Hipparcos catalog HIP 52558 [2] SAO catalog SAO 238423 [3] Tycho catalog TYC 8626-2075-1 [4] 2MASS catalog 2MASS J10444501-5933547 [5]

HD 93250 is one of the most massive stars currently known. Its mass is currently around 118  M _☉ . HD 93250 belongs to the open star cluster Trumpler 16 (Tr 16) in the constellation Carina . Its spectral class is given as O4 III (fc) or O3.5 V ((f +)). HD 93250 is the strongest X-ray source among the stars with spectral class O in the Carina Nebula.

Single or double star

It is uncertain whether the HD 93250 is a single or a double star. According to the following two sources, it is believed to be a single star. According to this source, however, the HD 93250 is a binary star system with 2 stars of the spectral class O. The estimated masses of the two stars are 47 and 43 M _☉, respectively .

designation

The catalog designation HD 93250 is made up as follows:

• HD : The star is listed in the Henry Draper catalog .
• 93250 : a serial number from the catalog.

Individual evidence

1. ↑ ^{a b c} HD 93250. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on August 27, 2018 . 
2. ↑ ^{a b c} http://iopscience.iop.org/2041-8205/740/2/L43/pdf/2041-8205_740_2_L43.pdf p. 1
3. ↑ ^{a b} http://arxiv.org/pdf/0906.2681.pdf p. 9
4. ↑ ^{a b c d} http://www.usm.uni-muenchen.de/people/puls/hotstar_diag/node18.html#SECTION00031200000000000000
5. ↑ http://iopscience.iop.org/2041-8205/740/2/L43/pdf/2041-8205_740_2_L43.pdf p. 3
6. ↑ http://arxiv.org/pdf/0906.2681.pdf p. 8
7. ↑ http://arxiv.org/pdf/0906.2681.pdf p. 9 "probably single star HD 93250"
8. ↑ http://cds.cern.ch/record/602595/files/0301485.pdf?version=1 p. 19 "If HD 93250 is single (and there is no clear evidence at present against this)"
9. ↑ http://iopscience.iop.org/2041-8205/740/2/L43/pdf/2041-8205_740_2_L43.pdf P. 5 "we provided evidence that HD 93250 is an O + O binary system."
10. ↑ http://iopscience.iop.org/2041-8205/740/2/L43/pdf/2041-8205_740_2_L43.pdf P. 3 "we derive a mass ratio M ₂ / M ₁ of 0.9." or "Assuming a circular orbit and a primary mass M ₁ of 47 M _☉ "