QZ Carinae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 44m 22.91114s |
| Declination | −59° 59′ 35.9550″ |
| Apparent magnitude (V) | 6.24 (6.16 - 6.49) |
| Characteristics | |
| Evolutionary stage | Blue supergiant (A1) Main sequence (A2 and B2) Blue giant (B1) |
| Spectral type | A1: O9.7I A2: B2V B1: O8III B2: O9V Ad: A3V |
| U−B color index | −0.84 |
| B−V color index | +0.13 |
| Variable type | β Lyr |
| Astrometry | |
| Radial velocity (Rv) | −2.80 km/s |
| Proper motion (μ) | RA: −6.63 mas/yr Dec.: 2.48 mas/yr |
| Parallax (π) | 1.67±0.40 mas |
| Distance | 2,300 pc |
| Orbit | |
| Primary | Aa |
| Companion | Ac |
| Period (P) | 14,403 days |
| Eccentricity (e) | 0.204±0.040 |
| Inclination (i) | 96.8±8.1° |
| Longitude of the node (Ω) | 147.6±6.5° |
| Periastron epoch (T) | 50072±547 |
| Argument of periastron (ω) (secondary) | 265±12° |
| Orbit | |
| Primary | Aa1 |
| Companion | Aa2 |
| Period (P) | 20.73 days |
| Eccentricity (e) | 0.390±0.021 |
| Inclination (i) | (assumed) 96.8±8.1° |
| Periastron epoch (T) | 42529.23 |
| Argument of periastron (ω) (secondary) | 134.5±3.9° |
| Semi-amplitude (K1) (primary) | 50.6±1.6 km/s |
| Orbit | |
| Primary | Ac1 |
| Companion | Ac2 |
| Period (P) | 5.999 days |
| Semi-major axis (a) | 53.53±0.64 R☉ |
| Eccentricity (e) | (fixed) 0 |
| Inclination (i) | 87.8±0.8° |
| Semi-amplitude (K1) (primary) | 253.2±2.5 km/s |
| Details | |
| Aa1 | |
| Mass | 69.8 M☉ |
| Radius | 22.1 R☉ |
| Luminosity | 400,000 L☉ |
| Surface gravity (log g) | 3.2 cgs |
| Temperature | 30,463 K |
| Aa2 | |
| Mass | 8.85 M☉ |
| Radius | 3.0 R☉ |
| Luminosity | 1,260 L☉ |
| Surface gravity (log g) | 4.3 cgs |
| Temperature | 20,000 K |
| Ac1 | |
| Mass | 25.4 M☉ |
| Radius | 13.7 R☉ |
| Luminosity | 200,000 L☉ |
| Surface gravity (log g) | 3.6 cgs |
| Temperature | 33,961 K |
| Ac2 | |
| Mass | 33.2 M☉ |
| Radius | 7.53 R☉ |
| Luminosity | 50,100 L☉ |
| Surface gravity (log g) | 3.92 cgs |
| Temperature | 32,882 K |
| Ab | |
| Mass | 10-12 M☉ |
| Ad | |
| Mass | 2.0+0.2 −0.2 M☉ |
| Radius | 1.72 R☉ |
| Luminosity | 17.7 L☉ |
| Surface gravity (log g) | 4.27 cgs |
| Temperature | 8,896 K |
| Age | 9.7 Myr |
| Other designations | |
| QZ Car, HD 93206, HIP 52526, CD−59 3287, GC 14784, SAO 238414, GSC 08626-02523 | |
| Database references | |
| SIMBAD | data |
QZ Carinae (HD 93206) is a multiple star system in the constellation Carina. It is the brightest member of the loose open cluster Collinder 228 and one of the brightest stars in the Carina Nebula. The apparent magnitude is variable from +6.16 to +6.49 with a period of 6 days.