HD 166114

HD 166114
Location of HD 166114 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Australis
Right ascension 18h 11m 05.56282s[1]
Declination −41° 21′ 32.8142″[1]
Apparent magnitude (V) 5.85±0.01[2]
Characteristics
Spectral type F2 V[3] or F0 Vn[4]
B−V color index +0.29[5]
Astrometry
Radial velocity (Rv)−4±4.3[6] km/s
Proper motion (μ) RA: +30.884 mas/yr[1]
Dec.: −37.254 mas/yr[1]
Parallax (π)12.3631 ± 0.2238 mas[1]
Distance264 ± 5 ly
(81 ± 1 pc)
Absolute magnitude (MV)+1.28[7]
Details
Mass1.68[8] M☉
Radius3.14±0.16[9] R☉
Luminosity25.6±0.9[1] L☉
Surface gravity (log g)3.80+0.09
−0.08[10] cgs
Temperature7,465±254[8] K
Metallicity [Fe/H]−0.09[11] dex
Age1.20[8] Gyr
Other designations
2 G. Coronae Australis[12], CD−41°12491, CPD−41°8614, FK5 3444, GC 24769, HD 166114, HIP 89099, HR 6786, SAO 228778[13]
Database references
SIMBADdata

HD 166114, also known as HR 6786 or rarely 2 G. Coronae Australis, is a solitary,[14] yellowish-white hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 5.85,[2] making it faintly visible to the naked eye under ideal conditions. The object is located relatively close at a distance of 264 light-years based on Gaia DR3 parallax measurements,[1] and it is currently approaching the Solar System with a poorly constrained heliocentric radial velocity of −4 km/s.[6] At its current distance, HD 166114's brightness is diminished by an extinction of 0.31 magnitudes[15] and it has an absolute magnitude of +1.28.[7]

HD 166114 has a stellar classification of either F2 V[3] or F0 Vn[4]—both indicating that it is a F-type main-sequence star. The second class also displays a presence of nebulous or broad absorption lines due to rapid rotation. Abt and Morell (1995) give a class of A8 IV,[16] instead indicating that it is a slightly evolved A-type subgiant. Gaia DR3 models it to be a rather evolved main sequence star.[1]

The object has 1.68 times the mass of the Sun[8] and a slightly enlarged radius of 3.14 R☉.[9] It radiates 25.6 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 7,465 K.[8] HD 166114 is slightly metal deficient with an iron abundance 81% that of the Sun ([Fe/H] = −0.09)[11] and it is estimated to be 1.2 billion years old.[8]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 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 Evans1966 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d e f Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Netopil2017 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Abt1995 was invoked but never defined (see the help page).