| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Antlia |
| Right ascension | 10h56m 43.05097s[1] |
| Declination | –37° 08′ 15.9521″[1] |
| Apparent magnitude (V) | +4.60[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch[3] |
| Spectral type | K1 III[4] |
| U−B color index | +0.84[2] |
| B−V color index | +1.03[2] |
| Astrometry | |
| Radial velocity (Rv) | 2.30±0.31[1] km/s |
| Proper motion (μ) | RA: +74.303±0.221[1] mas/yr Dec.: −125.185±0.259[1] mas/yr |
| Parallax (π) | 16.1823 ± 0.1882 mas[1] |
| Distance | 202 ± 2 ly (61.8 ± 0.7 pc) |
| Absolute magnitude (MV) | +0.77[5] |
| Details | |
| Mass | 1.55[6] M☉ |
| Radius | 12.10+0.21 −0.65[1] R☉ |
| Luminosity | 66.7±0.9[1] L☉ |
| Surface gravity (log g) | 2.76[7] cgs |
| Temperature | 4,892[7] K |
| Metallicity [Fe/H] | −0.03[7] dex |
| Age | 3.32[6] Gyr |
| Other designations | |
ι Ant, CPD–36°6808, FK5 414, HD 94890, HIP 53502, HR 4273, SAO 201927, PPM 288317[8] | |
| Database references | |
| SIMBAD | data |
Iota Antliae, Latinized from ι Antliae, is a single,[9] orange-hued star in the southern constellationofAntlia. It has an apparent visual magnitude of +4.60,[2] making it a faint naked eye star. From parallax measurements, the distance to this star can be estimated as 202 ± 2light-years (61.93 ± 0.61 parsecs).[1] It is drifting further away with a radial velocity of 2 km/s.[1]
The spectrum of Iota Antliae matches a stellar classification of K1 III,[4] indicating that this is an evolved star that is now in its giant phase. Having exhausted the supply of hydrogen at its core, the star has expanded and it now spans 12[1] times the radius of the Sun. It is a red clump giant, indicating it is on the horizontal branch and is generating energy through helium fusion.[3] The star is 3.32[6] billion years old with 1.55[6] times the Sun's mass. It is radiating 67[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,892 K.[7]
