HD 114386

Last updated
HD 114386
Observation data
Epoch J2000       Equinox J2000
Constellation Centaurus [1]
Right ascension 13h 10m 39.824s [2]
Declination −35° 03′ 17.21″ [2]
Apparent magnitude  (V)8.73 [3]
Characteristics
Evolutionary stage main sequence [2]
Spectral type K3 V [3]
B−V color index 0.982 [3]
Astrometry
Radial velocity (Rv)33.350±0.0004 [4] km/s
Proper motion (μ)RA: −137.143 mas/yr [2]
Dec.: −324.874 mas/yr [2]
Parallax (π)35.7355±0.0200  mas [2]
Distance 91.27 ± 0.05  ly
(27.98 ± 0.02  pc)
Absolute magnitude  (MV)6.43 [1]
Details
Mass 0.76±0.01 [5]   M☉
Radius 0.73±0.01 [5]   R☉
Luminosity 0.28±0.01 [5]   L☉
Surface gravity (log g)4.58±0.02 [5]   cgs
Temperature 4,926±13 [5]   K
Metallicity [Fe/H]−0.012 [6]   dex
Rotational velocity (v sin i)3.06 [6]  km/s
Age 8.8±2.8 [5]   Gyr
Other designations
CD−34°8698, HD 114386, HIP 64295, SAO 204193, PPM 291056, LTT 5041, NLTT 33118 [7]
Database references
SIMBAD data
Exoplanet Archive data

HD 114386 is a star with a pair of orbiting exoplanets in the southern constellation of Centaurus. It has an apparent visual magnitude of 8.73, [3] which means it cannot be viewed with the naked eye but can be seen with a telescope or good binoculars. Based on parallax measurements, the system is located at a distance of 91  light-years from the Sun. It is receding with a radial velocity of 33.4 km/s. [4] The star shows a high proper motion, traversing the celestial sphere at an angular rate of 0.318 arcsec yr−1. [8]

Contents

The spectrum of HD 114386 yields a stellar classification of K3 V, [3] matching a K-type main-sequence star, or orange dwarf. It has 76% of the mass of the Sun and 73% of the Sun's radius. HD 114386 is a much older star than the Sun with an estimated age of roughly nine billion years. [5] The abundance of iron in the stellar atmosphere, a measure of the star's metallicity, is nearly solar. [6] It is rather dim compared to the Sun, radiating just 28% of the luminosity of the Sun from its photosphere at an effective temperature of 4,926 K. [5]

Planetary system

In 2004, the Geneva Extrasolar Planet Search Team announced the discovery of an exoplanet orbiting the star by the radial velocity method. [3] The preliminary data for a second, inner, exoplanet was released in 2011; [9] it was confirmed in 2026. [10] The inclination and true mass of the outer planet have been determined by astrometry. [10]

The HD 114386 planetary system [10]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
c≥0.37±0.03  MJ 1.05+0.04
−0.04		444.00+0.93
−0.88		0.10±0.03——
b 1.46+0.37
−0.22  MJ 		1.86+0.07
−0.08		1049.4+1.5
−1.2		0.02±0.0157+22
−15 ° 		—

See also

References

  1. 1 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 6 Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv: astro-ph/0310316 . Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250. S2CID   5233877.
  4. 1 2 Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv: 1804.09370 . Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID   52952408.
  5. 1 2 3 4 5 6 7 8 Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: 14. arXiv: 1511.01744 . Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID   53971692. A5.
  6. 1 2 3 Rice, Malena; Brewer, John M. (August 2020). "Stellar Characterization of Keck HIRES Spectra with The Cannon". The Astrophysical Journal. 898 (2): 119. arXiv: 2007.02942 . Bibcode:2020ApJ...898..119R. doi: 10.3847/1538-4357/ab9f96 . 119.
  7. ↑ "HD 114386". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2024-01-09.
  8. ↑ Luyten, W. J. (June 1995). "NLTT Catalogue (Luyten, 1979)". VizieR Online Data Catalog. Bibcode:1995yCat.1098....0L.
  9. ↑ Mayor, M.; et al. (September 2011). "The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets". arXiv: 1109.2497 [astro-ph.EP].
  10. 1 2 3 Wu, Yiyun; Xiao, Guang-Yao; et al. (January 2026). "Detection of four cold Jupiters through combined analyses of radial velocity and astrometry data". arXiv: 2601.11280 [astro-ph.EP].
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