Iota Antliae

ι Antliae
Location of ι Antliae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 10h 56m 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]
Distance202 ± 2 ly
(61.8 ± 0.7 pc)
Absolute magnitude (MV)+0.77[5]
Details
Mass1.55[6] M☉
Radius12.10+0.21
−0.65[1] R☉
Luminosity66.7±0.9[1] L☉
Surface gravity (log g)2.76[7] cgs
Temperature4,892[7] K
Metallicity [Fe/H]−0.03[7] dex
Age3.32[6] Gyr
Other designations
ι Ant, CPD–36°6808, FK5 414, HD 94890, HIP 53502, HR 4273, SAO 201927, PPM 288317[8]
Database references
SIMBADdata

Iota Antliae, Latinized from ι Antliae, is a single,[9] orange-hued star in the southern constellation of Antlia. 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 ± 2 light-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]

  1. ^ a b c d e f g h i j k l Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference aa52_159 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Alves2015 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).