HD 6114

HD 6114 is a visual binary star system in the northern constellation of Andromeda. With a combined apparent magnitude of 6.46,^[1] 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^[2] as seen from Earth's orbit, the system is located approximately 108 parsecs (350 ly) distant.

HD 6114

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Andromeda[1]
HD 6114 A
Right ascension	01h 03m 01.54722s[2]
Declination	+47° 22′ 34.1796″[2]
Apparent magnitude (V)	6.76[3]
HD 6114 B
Right ascension	01h 03m 01.55854s[4]
Declination	+47° 22′ 33.0207″[4]
Apparent magnitude (V)	8.07[3]
Characteristics
Spectral type	A9 V[5][6]
Apparent magnitude (V)	6.46[1]
B−V color index	0.248±0.012[1]
Astrometry
HD 6114 A
Radial velocity (Rv)	+2.4±2.8[7] km/s
Proper motion (μ)	RA: 87.411±0.040[2] mas/yr Dec.: −15.153±0.024[2] mas/yr
Parallax (π)	9.2058±0.0392 mas[2]
Distance	354 ± 2 ly (108.6 ± 0.5 pc)
Absolute magnitude (MV)	1.56[1]
HD 6114 B
Proper motion (μ)	RA: 87.190±0.103[4] mas/yr Dec.: −23.426±0.042[4] mas/yr
Parallax (π)	9.4797±0.0651 mas[4]
Distance	344 ± 2 ly (105.5 ± 0.7 pc)
Orbit[8]
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[9] M☉
Luminosity	21.2+3.5 −3.0[10] L☉
Surface gravity (log g)	4.03±0.14[9] cgs
Temperature	7,611±259[9] K
Rotational velocity (v sin i)	149[10] km/s
Age	863[9] Myr
Other designations
BD+46°243, HD 6114, HIP 4911, HR 289, SAO 36875, ADS 862, WDS J01030+4723[11]
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°.^[3] The two stars orbit each other with a period of 450 years with an eccentricity of 0.80.^[8]

The primary is an A-type main-sequence star with a stellar classification of A9 V.^[5][6] At the estimated age of 863 million years, it is spinning rapidly with a projected rotational velocity of 149 km/s.^[10] The star has 1.65^[9] times the mass of the Sun and is radiating 21^[10] times the Sun's luminosity from its photosphere at an effective temperature of 7,611 K.^[9]