HD 114837

HD 114837 is a suspected binary star[7][3] system in the southern constellation of Centaurus. The brighter star is faintly visible to the naked eye with an apparent visual magnitude of 4.90.[2] It has a magnitude 10.2 candidate common proper motion companion at an angular separation of 4.2″, as of 2014.[3] The distance to this system, based on an annual parallax shift of 55.0143″ as seen from Earth's orbit,[1] is 59.3 light years. It is moving closer with a heliocentric radial velocity of −64 km/s,[5] and will approach to within 21.8 ly in around 240,600 years.[11]

HD 114837
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension  13h 14m 15.14594s[1]
Declination –59° 06′ 11.6528″[1]
Apparent magnitude (V) 4.90[2] + 10.2[3]
Characteristics
Spectral type F6 V Fe-0.4[4]
B−V color index 0.489±0.020[2]
Astrometry
Radial velocity (Rv)−64.0±0.3[5] km/s
Proper motion (μ) RA: −249.254[1] mas/yr
Dec.: −153.256[1] mas/yr
Parallax (π)55.0143 ± 0.2644[1] mas
Distance59.3 ± 0.3 ly
(18.18 ± 0.09 pc)
Absolute magnitude (MV)3.73[6]
Details
HD 114837 A
Mass1.14[7] M☉
Radius1.3[8] R☉
Luminosity3.12[2] L☉
Surface gravity (log g)4.21[9] cgs
Temperature6,346±80[9] K
Metallicity [Fe/H]−0.27[9] dex
Rotational velocity (v sin i)8.8±3.0[6] km/s
Age3.40[9] Gyr
Other designations
CD−58° 4940, GJ 503, HD 114837, HIP 64583, HR 4989, SAO 240666, WDS J13143-5906A[10]
Database references
SIMBADdata

The primary component is an F-type main-sequence star with a stellar classification of F6 V Fe-0.4,[4] showing a mild underabundance of iron in its spectrum. It is about 3.4[9] billion years old with 1.14[7] times the mass of the Sun and about 1.3[8] times the Sun's radius. This star is radiating 3.12[2] times the Sun's luminosity from its photosphere at an effective temperature of 6,346 K.[9]

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.
  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. Chini, R.; et al. (January 2014), "New visual companions of solar-type stars within 25 pc", Monthly Notices of the Royal Astronomical Society, 437 (1): 879–886, arXiv:1310.2684, Bibcode:2014MNRAS.437..879C, doi:10.1093/mnras/stt1953.
  4. 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, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
  5. de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  6. Ammler-von Eiff, M.; Reiners, A. (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724.
  7. Fuhrmann, K.; Chini, R.; Kaderhandt, L.; Chen, Z. (2017), "Multiplicity among Solar-type Stars", The Astrophysical Journal, 836: 139, Bibcode:2017ApJ...836..139F, doi:10.3847/1538-4357/836/1/139.
  8. Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  9. Casagrande, L.; et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics, 530: A138, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276.
  10. "HD 114837". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-05.
  11. Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics, 575: 13, arXiv:1412.3648, Bibcode:2015A&A...575A..35B, doi:10.1051/0004-6361/201425221, A35.
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