HD 125612

HD 125612
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
Right ascension 14h 20m 53.517665s[1]
Declination −17° 28′ 53.489700″[1]
Apparent magnitude (V) 8.31[2] / ?
Characteristics
Spectral type G3V[2] + M3- 4V[3]
Apparent magnitude (B) 8.938[4]
Apparent magnitude (J) 7.179±0.023[4]
Apparent magnitude (H) 6.950±0.059[4]
Apparent magnitude (K) 6.838±0.026[4]
B−V color index 0.628±0.018[4]
Astrometry
Radial velocity (Rv)−18.25±0.15[1] km/s
Proper motion (μ) RA: −60.260±0.034 mas/yr[1]
Dec.: −67.314±0.027 mas/yr[1]
Parallax (π)17.2897 ± 0.0279 mas[1]
Distance188.6 ± 0.3 ly
(57.84 ± 0.09 pc)
Absolute magnitude (MV)4.65[4]
Position (relative to HD 125612 A)[3]
ComponentHD 125612 B
Angular distance89.994±0.066″
Position angle162.682±0.052°
Projected separation~4,750 AU
Details
Mass1.091±0.027 M☉[2]
1.133±0.025[5] M☉
Radius1.05±0.08[2] R☉
Luminosity1.09[2] L☉
Surface gravity (log g)4.41±0.05[2] cgs
Temperature5,900±18[2] K
Metallicity [Fe/H]0.23±0.014[2] dex
Rotational velocity (v sin i)3.2[6] km/s
Age1.351±1.127[5] Gyr
HD 125612 B
Mass0.184±0.012[3] M☉
Age1-5[3] Gyr
Other designations
BD−16˚ 3844, HD 125612, HIP 70123, SAO 158501, PPM 228650, GSC 06143-01696[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 125612 is a binary star system with three exoplanetary companions[2][8] in the equatorial constellation of Virgo. It is too dim to be visible to the naked eye, having an apparent visual magnitude of 8.31.[2] The system is located at a distance of 188 light years from the Sun based on parallax measurements, but it is drifting closer with a radial velocity of −18 km/s.[1]

The yellow-hued primary component, designated HD 125612 A, is an ordinary G-type main-sequence star with a stellar classification of G3V,[2] which indicates it is generating energy through hydrogen fusion at its core. It is about 1.4[5] billion years old and is rich in heavy elements, having a 70% greater abundance of iron compared to the Sun. The star has 109% of the mass and 105% of the girth of the Sun. It is radiating 109% of the luminosity of the Sun from its photosphere at an effective temperature of 5,900 K.[2]

A red dwarf companion star, HD 125612 B, was detected in 2009 at a projected separation of 4750 AU. The possibility of a much closer companion to the primary star was also suggested, though this will need more observation to better define.[3]

  1. ^ a b c d e f Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k l Cite error: The named reference Lo Curto2010 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Mugrauer2009 was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Delgado_Mena_et_al_2019 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Costa_Silva_et_al_2020 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Fischer2007 was invoked but never defined (see the help page).