HD 6114
HD 6114 is a visual binary star system in the northern constellation of Andromeda. With a combined apparent magnitude of 6.46, the star can only be seen with the naked eye by keen-eyed observers even on the best of nights. Based upon an annual parallax shift of 10.4 mas as seen from Earth's orbit, the system is located approximately 108 parsecs (350 ly) distant.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Andromeda |
| HD 6114 A | |
| Right ascension | 01h 03m 01.54722s |
| Declination | +47° 22′ 34.1796″ |
| Apparent magnitude (V) | 6.76 |
| HD 6114 B | |
| Right ascension | 01h 03m 01.55854s |
| Declination | +47° 22′ 33.0207″ |
| Apparent magnitude (V) | 8.07 |
| Characteristics | |
| Spectral type | A9 V |
| Apparent magnitude (V) | 6.46 |
| B−V color index | 0.248±0.012 |
| Astrometry | |
| HD 6114 A | |
| Radial velocity (Rv) | +2.4±2.8 km/s |
| Proper motion (μ) | RA: 87.411±0.040 mas/yr Dec.: −15.153±0.024 mas/yr |
| Parallax (π) | 9.2058 ± 0.0392 mas |
| Distance | 354 ± 2 ly (108.6 ± 0.5 pc) |
| Absolute magnitude (MV) | 1.56 |
| HD 6114 B | |
| Proper motion (μ) | RA: 87.190±0.103 mas/yr Dec.: −23.426±0.042 mas/yr |
| Parallax (π) | 9.4797 ± 0.0651 mas |
| Distance | 344 ± 2 ly (105.5 ± 0.7 pc) |
| Orbit | |
| Period (P) | 450 yr |
| Semi-major axis (a) | 0.816″ |
| Eccentricity (e) | 0.80 |
| Inclination (i) | 87.0° |
| Longitude of the node (Ω) | 176.7° |
| Periastron epoch (T) | 1902.0 |
| Argument of periastron (ω) (secondary) | 180° |
| Details | |
| HD 6114 A | |
| Mass | 1.65 M☉ |
| Luminosity | 21.2+3.5 −3.0 L☉ |
| Surface gravity (log g) | 4.03±0.14 cgs |
| Temperature | 7,611±259 K |
| Rotational velocity (v sin i) | 149 km/s |
| Age | 863 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The binary nature of this system was discovered by O. Struve in 1864. It consists of a magnitude 6.76 primary component with a dimmer magnitude 8.07 secondary. As of 2015 the pair had an angular separation of 1.30″ along a position angle of 175°. The two stars orbit each other with a period of 450 years with an eccentricity of 0.80.
The primary is an A-type main-sequence star with a stellar classification of A9 V. At the estimated age of 863 million years, it is spinning rapidly with a projected rotational velocity of 149 km/s. The star has 1.65 times the mass of the Sun and is radiating 21 times the Sun's luminosity from its photosphere at an effective temperature of 7,611 K.