Gamma Horologii

Gamma Horologii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Horologium
Right ascension 02h 45m 27.47817s[1]
Declination −63° 42′ 16.3888″[1]
Apparent magnitude (V) +5.743[2]
Characteristics
Spectral type G8 III/IV[3]
B−V color index +0.929[2]
Astrometry
Radial velocity (Rv)−11.0±7.4[4] km/s
Proper motion (μ) RA: +19.42±0.28[1] mas/yr
Dec.: −8.61±0.27[1] mas/yr
Parallax (π)17.86 ± 0.24[1] mas
Distance183 ± 2 ly
(56.0 ± 0.8 pc)
Absolute magnitude (MV)+1.99[5]
Details
Luminosity16[6] L☉
Surface gravity (log g)3.18±0.05[7] cgs
Temperature4,961±24[7] K
Metallicity [Fe/H]−0.26±0.02[7] dex
Other designations
γ Hor, CPD−64° 196, HD 17504, HIP 12871, HR 833, SAO 248642[8]
Database references
SIMBADdata

γ Horologii, Latinised as Gamma Horologii, is a solitary,[9] yellow-hued giant/subgiant star in the southern constellation of Horologium. Located 183 ± 2 light-years from Earth, it shines with a luminosity approximately 16 times that of the Sun and has a surface temperature of 5,175 K.[6]

References

  1. 1 2 3 4 5 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.
  2. 1 2 Høg, E.; et al. (March 2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355: L27–L30, Bibcode:2000A&A...355L..27H, doi:10.1888/0333750888/2862.
  3. ↑ Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. ↑ 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.
  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.
  6. 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  7. 1 2 3 Alves, S.; et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society, 448 (3): 2749–2765, arXiv:1503.02556, Bibcode:2015MNRAS.448.2749A, doi:10.1093/mnras/stv189.
  8. ↑ "gam Hor". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-04-25.
  9. ↑ 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.
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