Iota Horologii
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 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.
Credit: Digital Sky Survey/VirGO | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Horologium |
| Right ascension | 02h 42m 33.4665s |
| Declination | −50° 48′ 01.0562″ |
| Apparent magnitude (V) | +5.40 |
| Characteristics | |
| Spectral type | G0Vp |
| B−V color index | 0.57 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | 16.94±0.12 km/s |
| Proper motion (μ) | RA: 333.716±0.035 mas/yr Dec.: 219.423±0.042 mas/yr |
| Parallax (π) | 57.6131 ± 0.0383 mas |
| Distance | 56.61 ± 0.04 ly (17.36 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.23 |
| Details | |
| Mass | 1.25 ± 0.01 M☉ |
| Radius | 1.16 ± 0.04 R☉ |
| Luminosity | 1.64 ± 0.05 L☉ |
| Temperature | 6,080 K |
| Metallicity [Fe/H] | 0.14–0.19 dex |
| Rotation | 7.70+0.18 −0.67 d |
| Rotational velocity (v sin i) | 6.0±0.5 km/s |
| Age | 0.625 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
In 1999, a planet of the star was discovered. 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.
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