HD 166114
F-type dwarf; Corona Australis / From Wikipedia, the free encyclopedia
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]
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] |
Distance | 264 ± 5 ly (81 ± 1 pc) |
Absolute magnitude (MV) | +1.28[7] |
Details | |
Mass | 1.68[8] M☉ |
Radius | 3.14±0.16[9] R☉ |
Luminosity | 25.6±0.9[1] L☉ |
Surface gravity (log g) | 3.80+0.09 −0.08[10] cgs |
Temperature | 7,465±254[8] K |
Metallicity [Fe/H] | −0.09[11] dex |
Age | 1.20[8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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]