HD 191806

HD 191806
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 20h 09m 28.30936s[1]
Declination +52° 16′ 34.8000″[1]
Apparent magnitude (V) 8.08±0.01[2]
Characteristics
Spectral type rG0V[3]
B−V color index +0.63[2]
Astrometry
Radial velocity (Rv)−15.33±0.13[1] km/s
Proper motion (μ) RA: 114.022±0.022 mas/yr[1]
Dec.: 91.296±0.022 mas/yr[1]
Parallax (π)15.1975 ± 0.0182 mas[1]
Distance214.6 ± 0.3 ly
(65.80 ± 0.08 pc)
Absolute magnitude (MV)+3.89[4]
Details
Mass1.1±0.1[5] M☉
Radius1.48+0.14
−0.13[6] R☉
Luminosity2.23±0.16[7] L☉
Surface gravity (log g)4.15±0.15[6] cgs
Temperature5,894+155
−86[5] K
Metallicity [Fe/H]+0.30±0.02[7] dex
Rotation20.6±6.9 d[7]
Rotational velocity (v sin i)3.3[7] km/s
Age2.9±0.4[7] Gyr
Other designations
AG+52°1354, BD+51°2782, HD 191806, HIP 99306, SAO 32320[8]
Database references
SIMBADdata
Exoplanet Archivedata

HD 191806 is a star located in the northern constellation Cygnus. With an apparent magnitude of 8.093, it's undetectable with the naked eye, but can be seen with binoculars. HD 191806 is currently placed at a distance of 215 light years based on parallax measurements and is drifting towards the Solar System with a spectroscopic radial velocity of −15.28 km/s.

HD 191806 has a stellar classification of G0V,[3] indicating that it is a G-type main sequence star. It has 110% the mass of the Sun[5] and a slightly enlarged radius of 1.48 R☉.[6] It radiates at 2.23 times the luminosity of the Sun[7] from its photosphere at an effective temperature of 5,894 K,[5] giving a yellow hue. HD 191806 is estimated to be about 3 billion years old and has a metallicity nearly twice of the Sun's.[7] It spins with a projected rotational velocity of 3.3 km/s, which corresponds to a rotational period of 21 days.[7]

  1. ^ a b c d e 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 tycho2 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference A.P1999 was invoked but never defined (see the help page).
  7. ^ a b c d e f g h Cite error: The named reference diaz2016 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).