HD 110458

This article is about w Centauri. Not to be confused with ω Centauri.
HD 110458
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 12h 42m 35.45s[1]
Declination −48° 48′ 47.2″[1]
Apparent magnitude (V) +4.66[2]
Characteristics
Spectral type K0III[3][4]
U−B color index +1.01
B−V color index +1.09
Astrometry
Radial velocity (Rv)−11.7±0.8[2] km/s
Proper motion (μ) RA: −123.84±0.16[1] mas/yr
Dec.: −30.17±0.13[1] mas/yr
Parallax (π)17.11 ± 0.22 mas[1]
Distance191 ± 2 ly
(58.4 ± 0.8 pc)
Absolute magnitude (MV)+0.99±0.028[5]
Details
Mass1.71[6] M☉
Radius11.61+0.23
−0.19[7] R☉
Luminosity60.8±2.0[7] L☉
Surface gravity (log g)2.61[5] cgs
Temperature4,682±26[6] K
Metallicity [Fe/H]0.19[5] dex
Age2.61[6] Gyr
Other designations
w Cen, CD−48°7608, GC 17282, HD 110458, HIP 62012, HR 4831, SAO 223614[8]
Database references
SIMBADdata

HD 110458 is a single[9] 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.[2] It is located at a distance of approximately 191 light years from the Sun based on parallax,[1] but is drifting closer with a radial velocity of −12 km/s.[2] Based on its space motion, in 1972 O. J. Eggen listed it as a probable member of the Hyades group.[10]

The stellar classification of HD 110458 is K0III,[3][4] 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[6] billion years old with 1.7[6] times the mass of the Sun and has expanded to 11.6[7] times the girth of the Sun. The star is radiating 61[7] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,682 K.[6]

  1. ^ a b c d e f Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Cohen_et_al_1999 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference park2013 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton_Tokovinin_2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggen1972 was invoked but never defined (see the help page).