HD 66920, also known as HR 3171, is a solitary, white hued star located in the southern circumpolar constellation Volans, the flying fish. It has an apparent magnitude of 6.33,[2] placing it near the limit for naked eye visibility. Based on parallax measurements from the Gaia spacecraft, the star is estimated to be 428 light years distant.[1] It appears to be receding from the Solar System, having a heliocentric radial velocity of 23.8 km/s.[5] Pauzen et al. (2001) listed it as a λ Boötis star,[3] but is now considered a non member.[14]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Volans |
Right ascension | 07h 59m 15.7648s[1] |
Declination | −73° 14′ 39.0155″[1] |
Apparent magnitude (V) | 6.33±0.01[2] |
Characteristics | |
Evolutionary stage | main sequence[1] |
Spectral type | A3 V[3] |
U−B color index | +0.13[4] |
B−V color index | +0.14[4] |
Astrometry | |
Radial velocity (Rv) | 23.8±1.7[5] km/s |
Proper motion (μ) | RA: −5.984 mas/yr[1] Dec.: −20.295 mas/yr[1] |
Parallax (π) | 7.6204 ± 0.0251 mas[1] |
Distance | 428 ± 1 ly (131.2 ± 0.4 pc) |
Absolute magnitude (MV) | +0.76[6] |
Details | |
Mass | 2.33[7] M☉ |
Radius | 3.53+0.13 −0.11[8] R☉ |
Luminosity | 42±2[9] L☉ |
Surface gravity (log g) | 3.65±0.08[8] cgs |
Temperature | 8,247±95[10] K |
Metallicity [Fe/H] | −0.01[11] dex |
Age | 711[1] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 66920 has a classification of A3 V,[3] indicating that it is an ordinary A-type main-sequence star. Although it has been classified as a giant star (III),[15] HR 3171 is still on the main sequence[1] (according to Gaia DR3 models). It has 2.33 times the mass of the Sun and an enlarged radius of 3.53 R☉.[8] It radiates 42 times the luminosity of the Sun[9] from its enlarged photosphere at an effective temperature of 8,247 K.[10] HD 66920 has a solar metallicity,[11] and is estimated to be 711 million years old.[1]