Astronomy:HD 114729

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Short description: Star in the constellation Centaurus
HD 114729
Observation data
Equinox J2000.0]] (ICRS)
Constellation Centaurus
Right ascension  13h 12m 44.259s[1]
Declination –31° 52′ 24.06″[1]
Apparent magnitude (V) 6.68[2]
Characteristics
Spectral type G0 V[3]
B−V color index 0.591±0.008[2]
Astrometry
Radial velocity (Rv)26.3378±0.0187[4] km/s
Proper motion (μ) RA: −199.927[1] mas/yr
Dec.: −308.130[1] mas/yr
Parallax (π)26.3378 ± 0.0187[5] mas
Distance123.84 ± 0.09 ly
(37.97 ± 0.03 pc)
Absolute magnitude (MV)3.89[2]
Details[6]
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[7] dex
Age9.30±0.60 Gyr
HD 114729 B
Mass0.253±0.011[8] M☉
Other designations
CD−31° 10156, HD 114729, HIP 64459, SAO 204237, WDS J13127-3152A[9]
Database references
SIMBADdata

HD 114729 is a Sun-like star with an orbiting exoplanet in the southern constellation of Centaurus. Based on parallax measurements, it is located at a distance of 124 light years from the Sun. It is near the lower limit of visibility to the naked eye, having an apparent visual magnitude of 6.68[2] The system is drifting further away with a heliocentric radial velocity of 26.3 km/s.[4] The system has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.373″·yr−1.[10]

The spectrum of HD 114729 presents as an ordinary G-type main-sequence star, a yellow dwarf, with a stellar classification of G0 V.[3] It has a negligible level of magnetic activity, making it chromosperically quiet.[11] The star has about the same mass as the Sun, but the radius has expanded to 44% greater than the Sun's girth. It is radiating more than double the luminosity of the Sun from its photosphere at an effective temperature of 5,939 K. The size and luminosity suggest a much greater age than the Sun; perhaps around nine billion years.[6]

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 astronomical unit|AU.[8]

Planetary system

In 2003 the California and Carnegie Planet Search team announced the discovery of a planet orbiting the star.[11] 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[12]
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 — —

See also

  • List of extrasolar planets

References

  1. ↑ 1.0 1.1 1.2 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 Gray, R. O. et al. (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. doi:10.1086/504637. Bibcode: 2006AJ....132..161G. 
  4. ↑ 4.0 4.1 Soubiran, C. et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics 616: A7. doi:10.1051/0004-6361/201832795. Bibcode: 2018A&A...616A...7S. 
  5. ↑ van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. 
  6. ↑ 6.0 6.1 Bonfanti, A. et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics 585: A5. doi:10.1051/0004-6361/201527297. Bibcode: 2016A&A...585A...5B. 
  7. ↑ Barry, Don C. et al. (2016). "HD 114729". Open Oxoplanet Catalogue 315: 264. doi:10.1086/165131. Bibcode: 1987ApJ...315..264B. 
  8. ↑ 8.0 8.1 Mugrauer, M. et al. (September 2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics 440 (3): 1051−1060. doi:10.1051/0004-6361:20042297. Bibcode: 2005A&A...440.1051M. 
  9. ↑ "HD 114729". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+114729. 
  10. ↑ Luyten, W. J. (June 1995). "NLTT Catalogue (Luyten, 1979)". VizieR Online Data Catalog. Bibcode: 1995yCat.1098....0L. 
  11. ↑ 11.0 11.1 Butler, R. Paul et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal 582 (1): 455–466. doi:10.1086/344570. Bibcode: 2003ApJ...582..455B. 
  12. ↑ Butler, R. P. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. doi:10.1086/504701. Bibcode: 2006ApJ...646..505B. 

External links

Coordinates: Sky map 13h 12m 44.2575s, −31° 52′ 24.056″



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