Astronomy:HD 114837

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Short description: Binary star system in the constellation Centaurus
HD 114837
Observation data
Equinox J2000.0]] (ICRS)
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

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]

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. 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode2018A&A...616A...1G. 
  2. 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode2012AstL...38..331A. 
  3. 3.0 3.1 3.2 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, doi:10.1093/mnras/stt1953, Bibcode2014MNRAS.437..879C. 
  4. 4.0 4.1 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, Bibcode2006AJ....132..161G. 
  5. 5.0 5.1 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, doi:10.1051/0004-6361/201219219, A61, Bibcode2012A&A...546A..61D. 
  6. 6.0 6.1 Ammler-von Eiff, Matthias; Reiners, Ansgar (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, doi:10.1051/0004-6361/201118724, Bibcode2012A&A...542A.116A. 
  7. 7.0 7.1 7.2 Fuhrmann, K.; Chini, R.; Kaderhandt, L.; Chen, Z. (2017), "Multiplicity among Solar-type Stars", The Astrophysical Journal 836: 139, doi:10.3847/1538-4357/836/1/139, Bibcode2017ApJ...836..139F. 
  8. 8.0 8.1 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, doi:10.1051/0004-6361:20000451, Bibcode2001A&A...367..521P. 
  9. 9.0 9.1 9.2 9.3 9.4 9.5 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, doi:10.1051/0004-6361/201016276, Bibcode2011A&A...530A.138C. 
  10. "HD 114837". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+114837. 
  11. Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics 575: 13, doi:10.1051/0004-6361/201425221, A35, Bibcode2015A&A...575A..35B.