HD 183263

HD 183263
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 28m 24.571367s[1]
Declination +08° 21′ 29.004523″[1]
Apparent magnitude (V) 7.86[2]
Characteristics
Spectral type G2 IV[3]
B−V color index 0.678±0.012[2]
Astrometry
Radial velocity (Rv)−50.377±0.0005[4] km/s
Proper motion (μ) RA: −18.947±0.021 mas/yr[1]
Dec.: −32.190±0.017 mas/yr[1]
Parallax (π)18.3425 ± 0.0206 mas[1]
Distance177.8 ± 0.2 ly
(54.52 ± 0.06 pc)
Absolute magnitude (MV)4.16[2]
Details[5]
Mass1.121±0.052 M☉
Radius1.117±0.038 R☉
Luminosity2.04[2] L☉
Surface gravity (log g)4.403±0.060 cgs
Temperature5,936±44 K
Metallicity [Fe/H]0.302±0.030 dex
Rotation32 days[6]
Rotational velocity (v sin i)1.56±0.50 km/s
Age8.1[6] Gyr
Other designations
BD+08° 4109, HD 179791, HIP 95740, SAO 124664, PPM 167917, TYC 1055-3415-1, GSC 01055-03415[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 183263 is a star with a pair of orbiting exoplanets located in the equatorial constellation of Aquila. It has an apparent visual magnitude of 7.86,[2] which is too faint to be visible to the naked eye. The distance to this system is 178 light years based on parallax measurements, but it is drifting closer with a heliocentric radial velocity of −50 km/s.[4] Judging from its motion through space, this star is predicted to approach to within 32 light-years of the Sun in around 952,000 years.[8] At that distance, it will be faintly visible to the naked eye.[2]

This is an older star with a spectrum matching a stellar classification of G2 IV,[3] indicating it is about to leave the main sequence[6] after exhausting the supply of hydrogen at its core. It will then evolve into a red giant before dying as a white dwarf. This star has an absolute magnitude (apparent magnitude at 10 pc) of 4.16 compared to the Sun’s 4.83, which indicates the star is more luminous than the Sun, and therefore hotter by about 100 K. At the age of 8.1 billion years, the magnetic activity in its chromosphere is quiet and it is spinning slowly with a rotation period of 32 days.[6]

  1. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference McCuskey1949 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Feng2015 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Marcy2005 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Bailer-Jones_2015 was invoked but never defined (see the help page).