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

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 extrasolar planet orbiting the star. [3] The preliminary data for a second exoplanet was released in 2011. [9]

The HD 114386 planetary system [3] [9]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥0.37  MJ 1.65 [10] 4450.12——
c≥1.19  MJ –1,0460.06——

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 7 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. 1 2 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. ↑ "Confirmed Planets". NASA Exoplanet Archive. California Institute of Technology. Archived from the original on 12 December 2012.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.