HD 20782
Star in the constellation Fornax / From Wikipedia, the free encyclopedia
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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]
Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Constellation ...
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] |
Distance | 117.00 ± 0.07 ly (35.87 ± 0.02 pc) |
Absolute magnitude (MV) | +4.61[5] |
Details | |
Mass | 0.96+0.02 −0.01[6] M☉ |
Radius | 1.17±0.03[7] R☉ |
Luminosity | 1.262+0.005 −0.006[1] L☉ |
Surface gravity (log g) | 4.35+0.05 −0.08[8] cgs |
Temperature | 5,741±41[6] K |
Metallicity [Fe/H] | −0.06±0.02[9] dex |
Rotational velocity (v sin i) | 3.0±0.6[10] km/s |
Age | 8.5+2.5 −2.0[9] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
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