Multiple star system in the constellation Virgo
HD 126614 Observation dataEpoch J2000 Equinox J2000 Constellation Virgo [ 1] HD 126614 A Right ascension 14h 26m 48.27949s [ 2] Declination −05° 10′ 40.0131″[ 2] Apparent magnitude (V)± 0.03[ 3] LP 680-57 Right ascension 14h 26m 45.83640s [ 4] Declination −05° 10′ 19.4279″[ 4] Apparent magnitude (V)± 0.20[ 3] Characteristics Spectral type G8IV[ 5] [ 6] [ 7] Apparent magnitude (B)9.620[ 1] Apparent magnitude (J)± 0.021[ 1] Apparent magnitude (H)± 0.042[ 1] Apparent magnitude (K)± 0.036[ 1] B−Vcolor index ± 0.004[ 1] Astrometry HD 126614 A Radial velocity (Rv )± 0.0042[ 8] km/s Proper motion (μ)RA: ± 0.023mas /yr [ 2] Dec.: ± 0.018mas /yr [ 2] Parallax (π)13.6633± 0.0166 mas [ 2] Distance 238.7 ± 0.3 ly pc ) Absolute magnitude (MV )4.52[ 1] LP 680-57 Radial velocity (Rv )± 5.52[ 4] km/s Proper motion (μ)RA: ± 0.038mas /yr [ 4] Dec.: ± 0.034mas /yr [ 4] Parallax (π)13.6050± 0.0316 mas [ 4] Distance 239.7 ± 0.6 ly pc ) Absolute magnitude (MV )12.02[ 6] Orbit [ 9] Companion HD 126614 B Period (P)+4.696 yr Semi-major axis (a)+0.984 AU Eccentricity (e)+0.017 Inclination (i)+0.881 Longitude of the node (Ω)+2.600 Periastron epoch (T)450 124 .747+26.090 Argument of periastron (ω)+30.578 Semi-amplitude 1 )573 +0.012902 124 Details HD 126614 A Mass ± 0.03[ 6] M ☉ Radius ± 0.06[ 6] R ☉ Luminosity ± 0.19[ 6] L ☉ Surface gravity (log g )± 0.08[ 6] cgs Temperature ± 44[ 6] K Metallicity ± 0.04[ 6] Rotation ~99 days[ 6] Rotational velocity (v sin i )± 0.5[ 6] Age ± 2.0[ 6] Gyr HD 126614 B Mass +7.778 [ 9] M Jup LP 680-57 Mass 0.32[ 10] [ 11] M ☉ Radius 0.32[ 10] [ 11] R ☉ Luminosity 0.0106[ 10] L ☉ Surface gravity (log g )4.93[ 10] cgs Temperature 3,275[ 10] [ 11] K Metallicity [Fe/H] +0.46[ 7] dex Age 3.6 – 6.0[ 7] Gyr Other designations WDS J14268-0511[ 12] HD 126614 AB :BD −04°3690HD 126614HIP 70623SAO 139932PPM 197558G 124-40LTT 5698NLTT 37355[ 12] LP 680-57 :LP 680-57NLTT 37349[ 13] Database references SIMBAD A C Exoplanet Archive data
HD 126614 is atrinary star [ 14] equatorial constellation ofVirgo . The primary member, designated component A, is host to anexoplanetary companion. With anapparent visual magnitude of 8.81,[ 1] light years from theSun based onparallax measurements,[ 2] radial velocity of −33 km/s.[ 8]
The primary is alate G-type star with astellar classification of G8IV.[ 5] metal-rich star; among the most metal-rich stars currently known.[ 15] evolving subgiant star , but the very high metallicity makes comparisons to standard spectral types difficult.[ 16]
In 2010, a close stellar companion was resolved and designated component C. This object is a faintred dwarf at anangular separation of″ AU [ 16] radial velocity andastrometry have refined the parameters of HD 126614 C. It has an orbital period of about 60 years, with a smallersemi-major axis of 15 AU and a very low mass of81.1 M J [ 9] hydrogen fusion .
The outer companion, designated LP 680-57, was first reported in 1960 with theW. J. Luyten proper motion catalog.[ 17] [ 7] angular separation ofposition angle of 299°, as of 2015.[ 17] projected separation ofAU [ 7] common proper motion of the system has been confirmed, indicating that they are gravitationally bound.[ 16] [ 17]
A Doppler search for giant planets begun in 1997 at theKeck Observatory provided an 11 year baseline for detecting periodicity in the primary star's radial velocity data. In 2010, a Jovian companion was announced with anorbital period of 3.41 years.[ 6] astrometry .[ 9]
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