HD 110458

Last updated
HD 110458
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Centaurus [1]
Right ascension 12h 42m 35.45s [2]
Declination −48° 48′ 47.2″ [2]
Apparent magnitude  (V)+4.66 [1]
Characteristics
Evolutionary stage red clump [3]
Spectral type K0III [4] [5]
U−B color index +1.01
B−V color index +1.09
Astrometry
Radial velocity (Rv)−11.7±0.8 [1] km/s
Proper motion (μ)RA: −123.84±0.16 [2] mas/yr
Dec.: −30.17±0.13 [2] mas/yr
Parallax (π)17.11±0.22  mas [2]
Distance 191 ± 2  ly
(58.4 ± 0.8  pc)
Absolute magnitude  (MV)+0.99±0.028 [6]
Details
Mass 1.71 [7]   M☉
Radius 11.61+0.23
−0.19 [8]   R☉
Luminosity 60.8±2.0 [8]   L☉
Surface gravity (log g)2.61 [6]   cgs
Temperature 4,682±26 [7]   K
Metallicity [Fe/H]0.19 [6]   dex
Age 2.61 [7]   Gyr
Other designations
w Cen, CD−48°7608, GC 17282, HD 110458, HIP 62012, HR 4831, SAO 223614 [9]
Database references
SIMBAD data

HD 110458 is a single [10] star in the southern constellation of Centaurus. It has the Bayer designation w Centauri, while HD 110458 is the star's identifier in the Henry Draper Catalogue . The star has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.66. [1] It is located at a distance of approximately 191  light years from the Sun based on parallax, [2] but is drifting closer with a radial velocity of −12 km/s. [1] Based on its space motion, in 1972 O. J. Eggen listed it as a probable member of the Hyades group. [11]

The stellar classification of HD 110458 is K0III, [4] [5] which indicates this is an aging giant star that has exhausted the supply of hydrogen at its core. It is estimated to be 2.6 [7]  billion years old with 1.7 [7] times the mass of the Sun and has expanded to 11.6 [8] times the girth of the Sun. The star is radiating 61 [8] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,682 K. [7]

References

  1. 1 2 3 4 5 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 Van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  3. ↑ Laney, C. D.; Joner, M. D.; Pietrzyński, G. (2012). "A new Large Magellanic Cloud K-band distance from precision measurements of nearby red clump stars". Monthly Notices of the Royal Astronomical Society. 419 (2): 1637. arXiv: 1109.4800 . Bibcode:2012MNRAS.419.1637L. doi: 10.1111/j.1365-2966.2011.19826.x .
  4. 1 2 Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  5. 1 2 Cohen, Martin; et al. (April 1999), "Spectral Irradiance Calibration in the Infrared. X. A Self-Consistent Radiometric All-Sky Network of Absolutely Calibrated Stellar Spectra", The Astronomical Journal, 117 (4): 1864–1889, Bibcode:1999AJ....117.1864C, doi: 10.1086/300813 .
  6. 1 2 3 Park, Sunkyung; et al. (2013), "Wilson-Bappu Effect: Extended to Surface Gravity", The Astronomical Journal, 146 (4): 73, arXiv: 1307.0592 , Bibcode:2013AJ....146...73P, doi:10.1088/0004-6256/146/4/73, S2CID   119187733.
  7. 1 2 3 4 5 6 Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 23, arXiv: 1507.01466 , Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID   118505114, 88.
  8. 1 2 3 4 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 . Gaia DR2 record for this source at VizieR.
  9. ↑ "HD 110458". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2021-01-28.
  10. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879, arXiv: 0806.2878 , Bibcode:2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x , S2CID   14878976.
  11. ↑ Eggen, O. J. (June 1972), "The red giants in the Hyades group", Publications of the Astronomical Society of the Pacific, 84: 406, Bibcode:1972PASP...84..406E, doi: 10.1086/129303 .
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