HD 83380
Star in the constellation Antlia
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HD 83380 (HR 3833) is an orange-hued star in the southern constellation of Antlia. It shines faintly with an apparent magnitude of 5.62[1] when viewed in ideal conditions. Parallax measurements place the object at distance of 312 light-years.[2] It has a heliocentric radial velocity of −2.6 km/s,[5] indicating that it is drifting towards the Solar System.
 | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Antlia[1] |
| Right ascension | 09h 37m 09.89308s[2] |
| Declination | −32° 10′ 43.2374″[2] |
| Apparent magnitude (V) | 5.62[1] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K1 III[3] |
| B−V color index | +1.02[4] |
| Astrometry | |
| Radial velocity (Rv) | −2.6±0.6[5] km/s |
| Proper motion (μ) | RA: +27.757[2] mas/yr Dec.: −15.640[2] mas/yr |
| Parallax (π) | 10.4548±0.0533 mas[2] |
| Distance | 312 ± 2 ly (95.6 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.69[6] |
| Details[6] | |
| 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[7] km/s |
| Other designations | |
| 17 G. Antliae[8], CD−31°7458, CPD−31°2797, FK5 1248, HD 83380, HIP 47199, HR 3833, SAO 200561[9] | |
| Database references | |
| SIMBAD | data |
HD 83380 has a stellar classification of K1 III,[3] indicating that it is an evolved red giant. Gaia DR3 stellar evolution models place the object on the red giant branch.[2] At present it has 2.17 times the mass of the Sun and an enlarged radius of 10.3 R☉.[6] It shines with a luminosity 55 times greater than the Sun from its photosphere at an effective temperature of 4,905 K.[6] HD 83380 is slightly metal enriched with a metallicity 126% that of the Sun.[6] It spins with a projected rotational velocity too low to be measured accurately,[7] and is believed to be a member of the thin disk population.[10]
The multiplicity status of HD 83380 isn't generally agreed on. De Mederios et al. (2014) found it to be a probable spectroscopic binary[7] while Eggleton and Tokovinin (2008) list it as a solitary star.[11]