HD 93129
Triple star system in the constellation Carina / From Wikipedia, the free encyclopedia
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HD 93129 is a triple star system in the Carina Nebula, with all three components being hot O class stars amongst the most luminous stars in the Milky Way. It is the dominant member of the Trumpler 14 star cluster, a young star cluster within the Carina OB1 stellar association that harbors other super-luminous stars, like Eta Carinae and WR 25.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
HD 93129 surrounded by the lesser stars of Trumpler 14 Credit: NASA & ESA, Jesús Maíz Apellániz (Instituto de Astrofisica de Andalucia) | |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Carina |
Right ascension | 10h 43m 57.5s[1] |
Declination | −59° 32′ 51.3″[1] |
Apparent magnitude (V) | 6.90[2] (7.310[1] + 8.84[3]) |
Characteristics | |
A | |
Spectral type | O2If*[4] (O2If+O3.5V[5]) |
U−B color index | −0.81[3] |
B−V color index | +0.25[3] |
B | |
Evolutionary stage | main sequence |
Spectral type | O3.5 V((f))z[6] |
U−B color index | −0.79[3] |
B−V color index | +0.23[3] |
Astrometry | |
Radial velocity (Rv) | −0.4 ± 7.4[7] km/s |
Proper motion (μ) | RA: -5.0[1] mas/yr Dec.: 17.0[1] mas/yr |
Distance | 2,300[5] pc |
Absolute magnitude (MV) | (A): −6.5 (−6.1 + −5.2) (B): −4.9[8] |
Details | |
Aa | |
Mass | 110[8] M☉ |
Radius | 22.5[9] R☉ |
Luminosity | 1,480,000[10] L☉ |
Surface gravity (log g) | 3.71[9] cgs |
Temperature | 42,500[9] K |
Rotational velocity (v sin i) | 130[9] km/s |
Age | 0.9+0.2 −0.4[7] Myr |
Ab | |
Mass | 70[8] M☉ |
Radius | 13.1[11] R☉ |
Luminosity | 575,000[10] L☉ |
Temperature | 44,000[11] K |
B | |
Mass | 52[12] M☉ |
Radius | 13[12] R☉ |
Luminosity | 575,000[10] L☉ |
Surface gravity (log g) | 3.92[12] cgs |
Temperature | 44,000[12] K |
Rotational velocity (v sin i) | 112[7] km/s |
Other designations | |
A: TYC 8626-2805-1, ALS 15862, LS 1820 | |
B: ALS 19309 | |
Database references | |
SIMBAD | HD 93129 |
HD 93129 A | |
HD 93129 B |
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