HD 166066

HD 166066
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Octans
Right ascension 18h 38m 51.0741s[1]
Declination −85° 42′ 32.2260″[1]
Apparent magnitude (V) 8.10±0.01[2]
Characteristics
Spectral type G0 V[3]
B−V color index +0.59[2]
Astrometry
Radial velocity (Rv)2.93±2.55[4] km/s
Proper motion (μ) RA: +147.318 mas/yr[1]
Dec.: −43.097 mas/yr[1]
Parallax (π)14.5962 ± 0.1186 mas[1]
Distance223 ± 2 ly
(68.5 ± 0.6 pc)
Absolute magnitude (MV)4.09[5]
Details
Mass1.13[6] M☉
Radius1.39+0.07
−0.05[7] R☉
Luminosity2.12[5] L☉
Surface gravity (log g)4.25[6] cgs
Temperature6,054±80[6] K
Metallicity [Fe/H]−0.03[6] dex
Rotational velocity (v sin i)5[8] km/s
Age7.0+2.5
−1.2[9] Gyr
Other designations
CD−85°150, CPD−85°478, HD 166066, HIP 91434, GSC 09527-01174[10]
Database references
SIMBADdata

HD 166066 is a solitary star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 8.10,[2] making it readily visible in binoculars, but not to the naked eye. The object is located 223 light years away from the Solar System,[1] but is drifting away with a poorly constrained radial velocity of about 2.93 km/s.[4]

HD 166066 has a stellar classification of G0 V, indicating that it is a G-type main sequence star similar to the Sun.[3] However, the calcium H & K lines are narrow and weak for its class.[3] It has 113% the mass of the Sun[6] and 139% its radius, along with twice its luminosity.[5][7]

The iron abundance is 93% that of the Sun, and is slightly hotter, with an effective temperature of 6,054 K[6] compared to the Sun's 5,778 K. HD 166066 is significantly older, with an age of 7 billion years,[9] and rotates modestly with a projected rotational velocity of 5 km/s.[8]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference DR2 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Nordstrom2014 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).