HD 114729

HD 114729 is a 7th magnitude star approximately 118 ly (36.1 pc) away in the constellation of Centaurus. Like our Sun (G2V), it is a yellow dwarf (spectral type G0V). It is about the same mass as the Sun, but twice as luminous. That indicates a much greater age, perhaps over 10 billion years. HD 114729 has a co-moving companion designated HD 114729 B, with the latter having 25.3% of the Sun's mass and a projected separation of 282±10 AU.[6]

HD 114729
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension  13h 12m 44.25696s[1]
Declination –31° 52′ 24.0555″[1]
Apparent magnitude (V) 6.68[2]
Characteristics
Spectral type G0 V[3]
B−V color index 0.591±0.008[2]
Astrometry
Proper motion (μ) RA: −202.87[1] mas/yr
Dec.: −308.32[1] mas/yr
Parallax (π)27.69 ± 0.54[1] mas
Distance118 ± 2 ly
(36.1 ± 0.7 pc)
Absolute magnitude (MV)3.89[2]
Details[4]
HD 114729 A
Mass0.97±0.01 M☉
Radius1.44±0.03 R☉
Luminosity2.33±0.02 L☉
Surface gravity (log g)4.10±0.02 cgs
Temperature5,939±58 K
Metallicity [Fe/H]−0.220[5] dex
Age9.30±0.60 Gyr
HD 114729 B
Mass0.253±0.011[6] M☉
Other designations
CD−31° 10156, HD 114729, HIP 64459, SAO 204237, WDS J13127-3152A[7]
Database references
SIMBADdata

Planetary system

In 2003 the California and Carnegie Planet Search team announced the discovery of a planet orbiting the star.[8] This planet orbits twice as far away from the star as Earth to the Sun and orbits very eccentrically. It has mass at least 95% (0.840) that of Jupiter and thus a minimum of 267 times the mass of Earth.

The HD 114729 planetary system[9]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >0.95 ± 0.10 MJ 2.11 ± 0.12 1114 ± 15 0.167 ± 0.055 — —
gollark: ABR is on about 40.
gollark: Or cognitohazardously affected.
gollark: It would be cognitohazardated, really.
gollark: They must have low IRV.
gollark: Wow, the cognitohazard worked on lyricly that easily?

See also
  • List of extrasolar planets

References
  1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.
  3. Gray, R.O.; Corbally, C.J.; Garrison, R.F.; McFadden, M.T.; Bubar, E.J.; McGahee, C.E.; O'Donoghue, A.A.; Knox, E.R. (July 2006). "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
  4. Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: A5, 14 pp. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297.
  5. "HD 114729", Open Oxoplanet Catalogue, 2016, Bibcode:1987ApJ...315..264B, doi:10.1086/165131
  6. Mugrauer, M.; Neuhäuser, R.; Seifahrt, A.; Mazeh, T.; Guenther, E. (September 2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics. 440 (3): 1051−1060. arXiv:astro-ph/0507101. Bibcode:2005A&A...440.1051M. doi:10.1051/0004-6361:20042297.
  7. "HD 114729". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-06-25.
  8. Butler, R. Paul; et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal. 582 (1): 455–466. Bibcode:2003ApJ...582..455B. CiteSeerX 10.1.1.7.6988. doi:10.1086/344570.
  9. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.

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