HD 93129A
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Double star HD 93129A |
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| AladinLite | |||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Keel of the ship | ||||
| Right ascension | 18 h 43 m 57.5 s | ||||
| declination | -59 ° 32 ′ 51.3 ″ | ||||
| Apparent brightness | 6.97 likes | ||||
| Typing | |||||
| B − V color index | 0.16 | ||||
| U − B color index | −0.78 | ||||
| Spectral class | O3I / O3Iab | ||||
| Astrometry | |||||
| distance | 7,500 ly 3,067 pc |
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| Physical Properties | |||||
| Dimensions | > 120 M ☉ | ||||
| Luminosity |
5 500 000 L ☉ |
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| Effective temperature | 51,000 K | ||||
| Age | ≈ 900,000 a | ||||
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Other names and catalog entries |
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HD 93129A is a super giant with 80 times the mass of our sun and with two and a half million times the luminosity one of the brightest stars in the Milky Way . The system is a spectroscopic binary star and consists of 2 stars of the spectral class O, which is about 7,500 light years away from Earth . The surface temperature of the lighter component is around 51,000 Kelvin . The system is part of the open star cluster Trumpler 14 in the Carina Nebula , relatively close to Eta Carinae in the southern sky .
Web links
- Data on the star
- http://www.eso.org/public/germany/videos/eso0947a/ (zoom on Trumpler 14)