HD 93129A
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Carina |
| Right ascension | 10h 43m 57.5s |
| Declination | −59° 32' 51.3" |
| Apparent magnitude (V) | 6.97 |
| Characteristics | |
| Spectral type | O3Iab |
| U-B color index | −0.78 |
| B-V color index | 0.16 |
| Details | |
| Mass | >120 M☉ |
| Luminosity | 5,500,000(bolometric) L☉ |
| Temperature | 51,000 K |
| Age | 900,000 years |
| Database references | |
| SIMBAD | data |
HD 93129A is one of the most luminous stars in the Milky Way. It is an O-type supergiant located about 10,000 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.
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