Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Virgo |
HD 126614 A | |
Right ascension | 14h 26m 48.279494s [1] |
Declination | −05° 10′ 40.01306″ [1] |
Apparent magnitude (V) | 8.81±0.03 [2] |
LP 680-57 | |
Right ascension | 14h 26m 45.836397s [3] |
Declination | −05° 10′ 19.427938″ [3] |
Apparent magnitude (V) | 16.68±0.20 [2] |
Characteristics | |
Spectral type | G8IV [4] + M [5] + M5.5V [6] |
Apparent magnitude (B) | 9.620 [7] |
Apparent magnitude (J) | 7.470±0.021 [7] |
Apparent magnitude (H) | 7.160±0.042 [7] |
Apparent magnitude (K) | 7.060±0.036 [7] |
B−V color index | 0.810±0.004 [7] |
Astrometry | |
HD 126614 A | |
Radial velocity (Rv) | −32.897±0.0042 [8] km/s |
Proper motion (μ) |
RA: −149.760±0.023
mas/
yr
[1] Dec.: −145.837±0.018 mas/ yr [1] |
Parallax (π) | 13.6633 ± 0.0166 mas [1] |
Distance | 238.7 ± 0.3
ly (73.19 ± 0.09 pc) |
Absolute magnitude (MV) | 4.52 [7] |
LP 680-57 | |
Radial velocity (Rv) | −29.45±5.52 [3] km/s |
Proper motion (μ) |
RA: −147.861±0.038
mas/
yr
[3] Dec.: −149.118±0.034 mas/ yr [3] |
Parallax (π) | 13.6050 ± 0.0316 mas [3] |
Distance | 239.7 ± 0.6
ly (73.5 ± 0.2 pc) |
Absolute magnitude (MV) | 12.02 [5] |
Orbit [9] | |
Companion | HD 126614 B |
Period (P) | 59.979+4.696 −5.059 yr |
Semi-major axis (a) | 15.229+0.984 −1.094 AU |
Eccentricity (e) | 0.056+0.017 −0.018 |
Inclination (i) | 16.294+0.881 −0.771° |
Longitude of the node (Ω) | 284.664+2.600 −3.304° |
Periastron epoch (T) | 2450124.747+26.090 −28.486 |
Argument of periastron (ω) (secondary) | 240.567+30.578 −43.150° |
Semi-amplitude (K1) (primary) | 0.167573+0.012902 −0.011124 km/s |
Details | |
HD 126614 A | |
Mass | 1.145±0.03 [5] M☉ |
Radius | 1.09±0.06 [5] R☉ |
Luminosity | 1.21±0.19 [5] L☉ |
Surface gravity (log g) | 4.39±0.08 [5] cgs |
Temperature | 5,585±44 [5] K |
Metallicity | +0.56±0.04 [5] |
Rotation | ~99 days [5] |
Rotational velocity (v sin i) | 2.0±0.5 [5] km/s |
Age | 7.2±2.0 [5] Gyr |
HD 126614 B | |
Mass | 81.128+7.778 −7.922 [9] MJup |
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 [6] dex |
Age | 3.6 – 6.0 [6] Gyr |
Other designations | |
HD 126614 AB: BD–04°3690, HD 126614, HIP 70623, SAO 139932, PPM 197558, G 124-40, LTT 5698, NLTT 37355 [12] | |
LP 680-57: LP 680-57, NLTT 37349 [13] | |
Database references | |
SIMBAD | A |
C | |
Exoplanet Archive | data |
HD 126614 is a trinary star [14] system in the equatorial constellation of Virgo. The primary member, designated component A, is host to an exoplanetary companion. With an apparent visual magnitude of 8.81, [7] it is too faint to be seen with the naked eye. The system is located at a distance of 239 light years from the Sun based on parallax measurements, [1] but is drifting closer with a radial velocity of −33 km/s. [8]
The primary is a late G-type star with a stellar classification of G8IV. [4] It is a super metal-rich star; among the most metal-rich stars currently known. [15] This is most likely an 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 faint red dwarf at an angular separation of 0.5 ″, which corresponds to a projected physical separation of ~ 36 AU. [16] More recent observations using radial velocity and astrometry have refined the parameters of HD 126614 C. It has an orbital period of about 60 years, with a smaller semi-major axis of 15 AU and a very low mass of 81.1 MJ. [9] This mass is very near the mass limit allowed for hydrogen fusion.
The outer companion, designated LP 680-57, was first reported in 1960 with the W. J. Luyten proper motion catalog. [17] It is a magnitude 17.0 red dwarf with a class of M5.5, [6] located at an angular separation of 41.90″ from the primary along a position angle of 299°, as of 2015. [17] They have a physical projected separation of 3,040 AU. [6] The common proper motion of the system has been confirmed, indicating that they are gravitationally bound. [16] Many multiple star catalogues still refer to this companion as component B, as it was known prior to the discovery of the closer companion. [17]
A Doppler search for giant planets begun in 1997 at the Keck 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 an orbital period of 3.41 years. [5] In 2022, the inclination and true mass of HD 126614 Ab were measured via astrometry. [9]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( years) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 0.339+0.204 −0.019 MJ |
2.249+0.088 −0.096 |
3.442+0.016 −0.017 |
0.548+0.063 −0.062 |
97.477+35.340 −37.849 ° |
— |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Virgo |
HD 126614 A | |
Right ascension | 14h 26m 48.279494s [1] |
Declination | −05° 10′ 40.01306″ [1] |
Apparent magnitude (V) | 8.81±0.03 [2] |
LP 680-57 | |
Right ascension | 14h 26m 45.836397s [3] |
Declination | −05° 10′ 19.427938″ [3] |
Apparent magnitude (V) | 16.68±0.20 [2] |
Characteristics | |
Spectral type | G8IV [4] + M [5] + M5.5V [6] |
Apparent magnitude (B) | 9.620 [7] |
Apparent magnitude (J) | 7.470±0.021 [7] |
Apparent magnitude (H) | 7.160±0.042 [7] |
Apparent magnitude (K) | 7.060±0.036 [7] |
B−V color index | 0.810±0.004 [7] |
Astrometry | |
HD 126614 A | |
Radial velocity (Rv) | −32.897±0.0042 [8] km/s |
Proper motion (μ) |
RA: −149.760±0.023
mas/
yr
[1] Dec.: −145.837±0.018 mas/ yr [1] |
Parallax (π) | 13.6633 ± 0.0166 mas [1] |
Distance | 238.7 ± 0.3
ly (73.19 ± 0.09 pc) |
Absolute magnitude (MV) | 4.52 [7] |
LP 680-57 | |
Radial velocity (Rv) | −29.45±5.52 [3] km/s |
Proper motion (μ) |
RA: −147.861±0.038
mas/
yr
[3] Dec.: −149.118±0.034 mas/ yr [3] |
Parallax (π) | 13.6050 ± 0.0316 mas [3] |
Distance | 239.7 ± 0.6
ly (73.5 ± 0.2 pc) |
Absolute magnitude (MV) | 12.02 [5] |
Orbit [9] | |
Companion | HD 126614 B |
Period (P) | 59.979+4.696 −5.059 yr |
Semi-major axis (a) | 15.229+0.984 −1.094 AU |
Eccentricity (e) | 0.056+0.017 −0.018 |
Inclination (i) | 16.294+0.881 −0.771° |
Longitude of the node (Ω) | 284.664+2.600 −3.304° |
Periastron epoch (T) | 2450124.747+26.090 −28.486 |
Argument of periastron (ω) (secondary) | 240.567+30.578 −43.150° |
Semi-amplitude (K1) (primary) | 0.167573+0.012902 −0.011124 km/s |
Details | |
HD 126614 A | |
Mass | 1.145±0.03 [5] M☉ |
Radius | 1.09±0.06 [5] R☉ |
Luminosity | 1.21±0.19 [5] L☉ |
Surface gravity (log g) | 4.39±0.08 [5] cgs |
Temperature | 5,585±44 [5] K |
Metallicity | +0.56±0.04 [5] |
Rotation | ~99 days [5] |
Rotational velocity (v sin i) | 2.0±0.5 [5] km/s |
Age | 7.2±2.0 [5] Gyr |
HD 126614 B | |
Mass | 81.128+7.778 −7.922 [9] MJup |
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 [6] dex |
Age | 3.6 – 6.0 [6] Gyr |
Other designations | |
HD 126614 AB: BD–04°3690, HD 126614, HIP 70623, SAO 139932, PPM 197558, G 124-40, LTT 5698, NLTT 37355 [12] | |
LP 680-57: LP 680-57, NLTT 37349 [13] | |
Database references | |
SIMBAD | A |
C | |
Exoplanet Archive | data |
HD 126614 is a trinary star [14] system in the equatorial constellation of Virgo. The primary member, designated component A, is host to an exoplanetary companion. With an apparent visual magnitude of 8.81, [7] it is too faint to be seen with the naked eye. The system is located at a distance of 239 light years from the Sun based on parallax measurements, [1] but is drifting closer with a radial velocity of −33 km/s. [8]
The primary is a late G-type star with a stellar classification of G8IV. [4] It is a super metal-rich star; among the most metal-rich stars currently known. [15] This is most likely an 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 faint red dwarf at an angular separation of 0.5 ″, which corresponds to a projected physical separation of ~ 36 AU. [16] More recent observations using radial velocity and astrometry have refined the parameters of HD 126614 C. It has an orbital period of about 60 years, with a smaller semi-major axis of 15 AU and a very low mass of 81.1 MJ. [9] This mass is very near the mass limit allowed for hydrogen fusion.
The outer companion, designated LP 680-57, was first reported in 1960 with the W. J. Luyten proper motion catalog. [17] It is a magnitude 17.0 red dwarf with a class of M5.5, [6] located at an angular separation of 41.90″ from the primary along a position angle of 299°, as of 2015. [17] They have a physical projected separation of 3,040 AU. [6] The common proper motion of the system has been confirmed, indicating that they are gravitationally bound. [16] Many multiple star catalogues still refer to this companion as component B, as it was known prior to the discovery of the closer companion. [17]
A Doppler search for giant planets begun in 1997 at the Keck 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 an orbital period of 3.41 years. [5] In 2022, the inclination and true mass of HD 126614 Ab were measured via astrometry. [9]
Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( years) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 0.339+0.204 −0.019 MJ |
2.249+0.088 −0.096 |
3.442+0.016 −0.017 |
0.548+0.063 −0.062 |
97.477+35.340 −37.849 ° |
— |