HD 93129A
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.jpg) The Carina Nebula contains Eta Carinae and HD 93129A. |
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| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Carina |
| Right ascension | 10h 43m 57.5s |
| Declination | −59° 32' 51.3" |
| Apparent magnitude (V) | 6.97 |
| Characteristics | |
| Spectral type | O2.7la[1] |
| U−B color index | −0.78 |
| B−V color index | 0.16 |
| Details | |
| Mass | 120~127[1] M☉ |
| Radius | 25 R☉ |
| Luminosity | 5,500,000 L☉ |
| Temperature | 52,000 K |
| Age | 900,000 years |
| Database references | |
| SIMBAD | data |
HD 93129A is one of the most luminous stars in the Milky Way. This very young blue hypergiant is an O-type hypergiant located about 7500 light-years from Earth in the bright nebula NGC 3372, the same nebula that harbors other super luminous stars, like Eta Carinae.
HD 93129A is actually the brighter member of a binary system that, with its dimmer companion—also an O3 Ia supergiant (HD 93129B)—has an overall mass of 200 solar masses.
[edit] References
- ^ a b Nelan, Edmund P.; et al. (July 2004). "Resolving OB Systems in the Carina Nebula with the Hubble Space Telescope Fine Guidance Sensor". The Astronomical Journal 128 (1): 323–329. Bibcode 2004AJ....128..323N. doi:10.1086/420716.
[edit] Further reading
- Benaglia, P.; Koribalski, B. (2004). "Radio observations of HD 93129A: The earliest O star with the highest mass loss?". Astronomy & Astrophysics 416 (1): 171–178. arXiv:astro-ph/0312003. Bibcode 2004A&A...416..171B. doi:10.1051/0004-6361:20034138.
[edit] External links
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