HD 20782

HD 20782
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Fornax
Right ascension 03h 20m 03.57776s[1]
Declination −28° 51′ 14.6604″[1]
Apparent magnitude (V) 7.38[2]
Characteristics
Spectral type G1.5 V[3]
B−V color index +0.65[2]
Astrometry
Radial velocity (Rv)40.7±0.99[4] km/s
Proper motion (μ) RA: +349.054 mas/yr[1]
Dec.: −65.305 mas/yr[1]
Parallax (π)27.8760 ± 0.0172 mas[1]
Distance117.00 ± 0.07 ly
(35.87 ± 0.02 pc)
Absolute magnitude (MV)+4.61[5]
Details
Mass0.96+0.02
−0.01[6] M☉
Radius1.17±0.03[7] R☉
Luminosity1.262+0.005
−0.006[1] L☉
Surface gravity (log g)4.35+0.05
−0.08[8] cgs
Temperature5,741±41[6] K
Metallicity [Fe/H]−0.06±0.02[9] dex
Rotational velocity (v sin i)3.0±0.6[10] km/s
Age8.5+2.5
−2.0[9] Gyr
Other designations
CD−29°1231, CPD−29°382, HD 20782, HIP 15527, SAO 168469, WDS J03201-2851A, LTT 1582, TIC 144503325[11]
Database references
SIMBADdata
Exoplanet Archivedata

HD 20782 (HIP 15527; LTT 1582) is the primary of a wide binary system located in the southern constellation Fornax. It has an apparent magnitude of 7.38,[2] making it readily visible in binoculars but not to the naked eye. The system is located relatively close at a distance of 117 light-years based on Gaia DR3 parallax measurements,[1] but it is receding with a heliocentric radial velocity of 40.7 km/s.[4] At its current distance, HD 20782's brightness is diminished by 0.12 magnitudes due to interstellar extinction[12] and it has an absolute magnitude of +4.61.[5]

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Cousins1962 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Valenti2005 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Ramírez2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference van Belle2009 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Ghezzi2010 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Gonzalez2010 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).