GG Carinae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 55m 58.915s |
| Declination | −60° 23′ 33.44″ |
| Apparent magnitude (V) | 8.67 (8.4 to 8.9) |
| Characteristics | |
| Evolutionary stage | Supergiant |
| Spectral type | B0/2eq |
| B−V color index | 0.552±0.025 |
| Variable type | Unique |
| Astrometry | |
| Proper motion (μ) | RA: −6.966 mas/yr Dec.: 2.056 mas/yr |
| Parallax (π) | 0.4079±0.0185 mas |
| Distance | 8,000 ± 400 ly (2,500 ± 100 pc) |
| Absolute magnitude (MV) | −6.21 |
| Orbit | |
| Period (P) | 31.01±0.01 d |
| Semi-major axis (a) | 0.61±0.03 AU |
| Eccentricity (e) | 0.50±0.03 |
| Inclination (i) | 60±20° |
| Periastron epoch (T) | 2,452,069.36±1.30 JD |
| Argument of periastron (ω) (secondary) | 339.87+3.10 −3.06° |
| Semi-amplitude (K1) (primary) | 48.57+2.04 −1.87 km/s |
| Details | |
| Supergiant | |
| Mass | 24±4 M☉ |
| Radius | 27+9 −7 R☉ |
| Luminosity | 1.8+1.0 −0.7×105 L☉ |
| Temperature | 23,000±2,000 K |
| Companion | |
| Mass | 7.2 M☉ |
| Other designations | |
| GG Car, CD−59°3425, CPD−59°2855, HD 94878, HIP 53444, SAO 251181, PPM 358340, WDS J10560-6024A | |
| Database references | |
| SIMBAD | data |
GG Carinae is a binary star system in the southern constellation of Carina, abbreviated GG Car. It is a variable star with a brightness that fluctuates around an apparent visual magnitude of 8.67, making it too faint to be visible to the naked eye. The distance to this system is approximately 8,000 light years based on parallax measurements.