Astronomy: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 |
| Distance | 59.3 ± 0.3 ly (18.18 ± 0.09 pc) |
| Absolute magnitude (MV) | 3.73[6] |
| Details | |
| HD 114837 A | |
| Mass | 1.14[7] M☉ |
| Radius | 1.3[8] R☉ |
| Luminosity | 3.12[2] L☉ |
| Surface gravity (log g) | 4.21[9] cgs |
| Temperature | 6,346±80[9] K |
| Metallicity [Fe/H] | −0.27[9] dex |
| Rotational velocity (v sin i) | 8.8±3.0[6] km/s |
| Age | 3.40[9] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
- ↑ 1.0 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. Bibcode: 2018A&A...616A...1G.
- ↑ 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, Bibcode: 2012AstL...38..331A.
- ↑ 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, Bibcode: 2014MNRAS.437..879C.
- ↑ 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, Bibcode: 2006AJ....132..161G.
- ↑ 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, Bibcode: 2012A&A...546A..61D.
- ↑ 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, Bibcode: 2012A&A...542A.116A.
- ↑ 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, Bibcode: 2017ApJ...836..139F.
- ↑ 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, Bibcode: 2001A&A...367..521P.
- ↑ 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, Bibcode: 2011A&A...530A.138C.
- ↑ "HD 114837". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+114837.
- ↑ Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind", Astronomy & Astrophysics 575: 13, doi:10.1051/0004-6361/201425221, A35, Bibcode: 2015A&A...575A..35B.
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