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Star in the constellation Antlia From Wikipedia, the free encyclopedia
HD 83380 (HR 3833) is an orange-hued star in the southern constellation of Antlia. It shines faintly with a apparent magnitude of 5.62[2] when viewed in ideal conditions. Parallax measurements place the object at distance of 312 light-years.[1] It has a heliocentric radial velocity of −2.6 km/s,[6] indicating that it is drifting towards the Solar System.
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Antlia |
Right ascension | 09h 37m 09.89308s[1] |
Declination | −32° 10′ 43.2374″[1] |
Apparent magnitude (V) | 5.62[2] |
Characteristics | |
Evolutionary stage | red giant branch[3] |
Spectral type | K1 III[4] |
B−V color index | +1.02[5] |
Astrometry | |
Radial velocity (Rv) | −2.6±0.6[6] km/s |
Proper motion (μ) | RA: +27.757[1] mas/yr Dec.: −15.640[1] mas/yr |
Parallax (π) | 10.4548 ± 0.0533 mas[1] |
Distance | 312 ± 2 ly (95.6 ± 0.5 pc) |
Absolute magnitude (MV) | +0.69[7] |
Details[7] | |
Mass | 2.17±0.11 M☉ |
Radius | 10.3±0.2 R☉ |
Luminosity | 55.2±1.6 L☉ |
Surface gravity (log g) | 2.9±0.1 cgs |
Temperature | 4,905±42 K |
Metallicity [Fe/H] | +0.10±0.03 dex |
Rotational velocity (v sin i) | <1.4[8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 83380 has a stellar classification of K1 III,[4] indicating that it is an evolved red giant. Gaia DR3 stellar evolution models place the object on the red giant branch.[3] At present it has 2.17 times the mass of the Sun and an enlarged radius of 10.3 R☉.[7] It shines with a luminosity 55 times greater than the Sun from its photosphere at an effective temperature of 4,905 K.[7] HD 83380 is slightly metal enriched with a metallicity 126% that of the Sun.[7] It spins with a projected rotational velocity too low to be measured accurately,[8] and is believed to be a member of the thin disk population.[11]
The multiplicity status of HD 83380 isn't generally agreed on. De Mederios et al. (2014) found it to be a probable spectroscopic binary[8] while Eggleton and Tokovinin (2008) list it as a solitary star.[12]
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