Highly luminous binary star system in the constellation Carina
HD 93250
HD 93250 is the bright star just above and left of the centre of this image of the Carina Nebula, directly above the Keyhole Nebula. Credit: ESO
Observation data Epoch J2000 Equinox J2000
Constellation
Carina
Right ascension
10h 44m 45.028s[1]
Declination
−59° 33′ 54.68″[1]
Apparent magnitude (V)
7.41[2]
Characteristics
Spectral type
O4 IV(fc)[3]
U−B color index
−0.85[2]
B−V color index
+0.17[2]
Astrometry
Radial velocity (Rv)
11.6[4] km/s
Proper motion (μ)
RA: −7.116[1] mas/yr Dec.: +3.081[1] mas/yr
Parallax (π)
0.4115 ± 0.0199 mas[1]
Distance
7,900 ± 400 ly (2,400 ± 100 pc)
Absolute magnitude (MV)
−6.14[5]
Orbit[6]
Period (P)
194.31±0.39 d
Semi-major axis (a)
1.224±0.028 mas
Eccentricity (e)
0.217±0.011
Inclination (i)
22±41°
Longitude of the node (Ω)
59±20°
Argument of periastron (ω) (secondary)
171±24°
Details[5]
Radius
15.9 R☉
Luminosity
1,000,000 L☉
Surface gravity (log g)
3.96 cgs
Temperature
46,000 K
Rotational velocity (v sin i)
130 km/s
Age
1.3 Myr
A
Mass
49[6]M☉
Other designations
1E 104248-5918.0, XMMU J104444.8-593354, ALS 1859, 2E 2317, HIP 52558, CD-58°3537, GC 14791, CGO 246, GCRV 25947, PPM 339400, Trumpler 16 180, SAO 238423, Trumpler 14 101, TYC 8626-2075-1, CPC 20°3140, GOS G287.51-00.54 01, CPD−58°2661, GSC 08626-02075
Database references
SIMBAD
data
HD 93250 is a highly luminous hot blue binary star in the Carina Nebula in the constellation Carina.
^ abcdeVallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875.
Gaia DR3 record for this source at VizieR.
^ abcAntokhin, I. I.; Rauw, G.; Vreux, J.-M.; Van Der Hucht, K. A.; Brown, J. C. (2008). "XMM-Newton X-ray study of early type stars in the Carina OB1 association". Astronomy and Astrophysics. 477 (2): 593. arXiv:0711.3612. Bibcode:2008A&A...477..593A. doi:10.1051/0004-6361:20065711. S2CID 82888037.
^Maíz Apellániz, J.; Sota, A.; Arias, J. I.; Barbá, R. H.; Walborn, N. R.; Simón-Díaz, S.; Negueruela, I.; Marco, A.; Leão, J. R. S.; Herrero, A.; Gamen, R. C.; Alfaro, E. J. (2016). "The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 Additional O-type Systems". The Astrophysical Journal Supplement Series. 224 (1): 4. arXiv:1602.01336. Bibcode:2016ApJS..224....4M. doi:10.3847/0067-0049/224/1/4. S2CID 55658165.
^Rauw, G.; Nazé, Y.; Fernández Lajús, E.; Lanotte, A. A.; Solivella, G. R.; Sana, H.; Gosset, E. (2009). "Optical spectroscopy of X-Mega targets in the Carina nebula - VII. On the multiplicity of Tr16-112, HD93343 and HD93250". Monthly Notices of the Royal Astronomical Society. 398 (3): 1582–1592. arXiv:0906.2681. Bibcode:2009MNRAS.398.1582R. doi:10.1111/j.1365-2966.2009.15226.x. S2CID 13890955.
^ abRepolust, T.; Puls, J.; Herrero, A. (2004). "Stellar and wind parameters of Galactic O-stars. The influence of line-blocking/blanketing". Astronomy and Astrophysics. 415: 349. Bibcode:2004A&A...415..349R. doi:10.1051/0004-6361:20034594.
^ abLe Bouquin, J. -B; Sana, H.; Gosset, E.; De Becker, M.; Duvert, G.; Absil, O.; Anthonioz, F.; Berger, J. -P.; Ertel, S.; Grellmann, R.; Guieu, S.; Kervella, P.; Rabus, M.; Willson, M. (2017). "Resolved astrometric orbits of ten O-type binaries". Astronomy and Astrophysics. 601: A34. arXiv:1608.03525. Bibcode:2017A&A...601A..34L. doi:10.1051/0004-6361/201629260. S2CID 53686222.
HD93250 is a highly luminous hot blue binary star in the Carina Nebula in the constellation Carina. HD93250 is one of the brightest stars in the region...
as HD 93129 Ab. HD93250 is one of the brightest stars in the region of the Carina Nebula. It is only 7.5 arcminutes from Eta Carinae, and HD93250 is...
O3.5 main sequence star, is only 24' away within Trumpler 14, and HD93250 and HD 93205 are two more O3.5 stars in the larger Trumpler 16 cluster around...
due to an oscillation mode with variable amplitude in the hot supergiant HD 50064". Astronomy and Astrophysics. 513: L11. arXiv:1003.5551. Bibcode:2010A&A...
spectroscopy of X-Mega targets - II. The massive double-lined O-type binary HD 93205" (PDF). Monthly Notices of the Royal Astronomical Society. 326 (1):...
cluster IC 1805: II. The probably single stars HD 15570 and HD 15629, and the massive binary/triple system HD 15558". Astronomy & Astrophysics. 456 (3): 1121–1130...
of the most massive and luminous stars in the galaxy, like Eta Carinae, HD93250 and the binary WR 25. It lies five arc-minutes from Eta Carinae. Brown...
began broadcasting in high-definition via a direct-to-cable HD feed. TVO commenced over-the-air HD broadcasting in August 2011, in compliance with the CRTC...