Iota Horologii

Iota Horologii
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Horologium
Right ascension 02h 42m 33.46667s[1]
Declination −50° 48′ 01.0551″[1]
Apparent magnitude (V) +5.40[2]
Characteristics
Spectral type G0Vp[3]
B−V color index 0.57[2]
Variable type none
Astrometry
Radial velocity (Rv)16.94±0.12[1] km/s
Proper motion (μ) RA: 333.716(35)[1] mas/yr
Dec.: 219.423(42)[1] mas/yr
Parallax (π)57.6131 ± 0.0383 mas[1]
Distance56.61 ± 0.04 ly
(17.36 ± 0.01 pc)
Absolute magnitude (MV)+4.23[4]
Details
Mass1.25 ± 0.01[5] M☉
Radius1.16 ± 0.04[6] R☉
Luminosity1.64 ± 0.05[6] L☉
Temperature6,080[6] K
Metallicity [Fe/H]0.14–0.19[5] dex
Rotation7.70+0.18
−0.67 d[7]
Rotational velocity (v sin i)6.0±0.5[7] km/s
Age0.625[5] Gyr
Other designations
ι Hor, GJ 108, HD 17051, HIP 12653, HR 810, 2MASS J02423346-5048008[2]
Database references
SIMBADdata

Iota Horologii, Latinized from ι Horologii, is a yellow-hued star approximately 56.5 light-years away in the Horologium constellation. The star is classified as a G0Vp[3] yellow dwarf (it has previously been classified as G3 and a subgiant [IV]). It has a mass and radius larger than the Sun, and is about 50% more luminous.

In 1999, a planet of the star was discovered.[8] Because the planet orbits in a near Earth orbit, Iota Horologii was ranked 69th in the list of candidates for NASA's planned Terrestrial Planet Finder mission. In 2000, a dust disc was announced around the star, but this was later determined to be an instrumental artifact.[9]

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Simbad was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference SolStation was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Vauclair2008 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Bruntt2010 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Alvarado-Gómez2018 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference eso9938 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference eso0033 was invoked but never defined (see the help page).