HD 125612

HD 125612 is a yellow main sequence star located approximately 188 light years away in the constellation Virgo. It is rich in heavy elements and has three known planets in orbit around it.[2][4] A red dwarf companion star 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]

HD 125612
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
Right ascension 14h 20m 53.5177s[1]
Declination −17° 28 53.4888[1]
Apparent magnitude (V) 8.31[2] / ?
Characteristics
Spectral type G3V[2] / M3- 4V[3]
Apparent magnitude (B) 8.92
Apparent magnitude (J) 7.179
Apparent magnitude (H) 6.950
Apparent magnitude (K) 6.838
B−V color index 0.59
Variable type none
Astrometry
Radial velocity (Rv)−18.4 km/s
Proper motion (μ) RA: −60.258±0.094[1] mas/yr
Dec.: −67.373±0.082[1] mas/yr
Parallax (π)17.3261 ± 0.0490[1] mas
Distance188.2 ± 0.5 ly
(57.7 ± 0.2 pc)
Absolute magnitude (MV)4.72
Position (relative to HD 125612 A)[3]
ComponentHD 125612 B
Angular distance89.994 ± 0.066
Position angle162.682 ± 0.052°
Observed separation
(projected)
~4750 AU
Details
Mass1.091 ± 0.027[2] M
Radius1.05 ± 0.08[2] R
Luminosity1.09[2] L
Surface gravity (log g)4.41 ± 0.05[2] cgs
Temperature5900 ± 18[2] K
Metallicity[Fe/H] = 0.23 ± 0.014[2]
Age<3[2] Gyr
HD 125612 B
Mass0.184 ± 0.012[3] M
Age1-5[3] Gyr
Other designations
BD-16˚ 3844, HIP 70123, GSC 06143-01696, SAO 158501
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia
data

Planetary System

Diagram of the probable HD 125612 Star system.
The HD 125612 planetary system[5]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
c ≥0.055±0.01 MJ 0.0524±0.0031 4.15514±0.00026 0.049±0.038
b ≥3.1±0.4 MJ 1.372±0.083 557.04±0.35 0.4553±0.0055
d ≥7.28±0.93 MJ 4.06±0.25 2835.0±7.9 0.1172±0.0056

See also

References

  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Lo Curto, G.; et al. (2015). "The HARPS search for southern extra-solar planets. XXII. Multiple planet systems from the HARPS volume limited sample". Astronomy and Astrophysics. 512. A48. arXiv:1411.7048. Bibcode:2010A&A...512A..48L. doi:10.1051/0004-6361/200913523.
  3. Mugrauer, M.; Neuhäuser, R. (2009). "The multiplicity of exoplanet host stars New low-mass stellar companions of the exoplanet host stars HD 125612 and HD 212301". Astronomy and Astrophysics. 494 (1): 373–378. arXiv:0812.2561. Bibcode:2009A&A...494..373M. doi:10.1051/0004-6361:200810639.
  4. Fischer, Debra A.; et al. (2007). "Five Intermediate-Period Planets from the N2K Sample". The Astrophysical Journal. 669 (2): 1336–1344. arXiv:0704.1191. Bibcode:2007ApJ...669.1336F. doi:10.1086/521869.
  5. Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5.


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