HD 20782

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, 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, but it is receding with a heliocentric radial velocity of 40.7 km/s. At its current distance, HD 20782's brightness is diminished by 0.12 magnitudes due to interstellar extinction and it has an absolute magnitude of +4.61.

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