Iota2 Fornacis
Star in the constellation Fornax
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Iota2 Fornacis is the Bayer designation for a star in the southern constellation of Fornax. It is faintly visible to the naked eye on a dark night, having an apparent visual magnitude of 5.83.[2] The distance to this star, based upon an annual parallax shift of 29.46 mas, is around 111 light-years.[1] It is a member of the thin disk population of the Milky Way galaxy.[9]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 38m 18.66152s[1] |
| Declination | −30° 11′ 38.6284″[1] |
| Apparent magnitude (V) | 5.83[2] + 13.74[3] |
| Characteristics | |
| Spectral type | F6 V Fe-0.7 CH-0.4[4] |
| B−V color index | +0.48[2] |
| Astrometry | |
| Radial velocity (Rv) | 29.0±2.9[5] km/s |
| Proper motion (μ) | RA: +97.59[1] mas/yr Dec.: −74.25[1] mas/yr |
| Parallax (π) | 29.46±0.40 mas[1] |
| Distance | 111 ± 2 ly (33.9 ± 0.5 pc) |
| Absolute magnitude (MV) | 3.08[6] |
| Details | |
| ι For A | |
| Mass | 1.42[7] M☉ |
| Radius | 1.4[8] R☉ |
| Surface gravity (log g) | 3.47[4] cgs |
| Temperature | 6,366[6] K |
| Metallicity [Fe/H] | −0.41[4] dex |
| Rotational velocity (v sin i) | 4.7±0.2[6] km/s |
| Age | 3.67[9] Gyr |
| ι For B | |
| Mass | 0.35[7] M☉ |
| Other designations | |
| ι For, CD−30°973, HD 16538, HIP 12288, HR 777, SAO 193829[10] | |
| Database references | |
| SIMBAD | data |
This is an F-type main-sequence star with a stellar classification of F6 V Fe-0.7 CH-0.4.[4] The suffix notation indicates that absorption lines of iron and the carbon–hydrogen G-band are abnormally weak.[11] It has an estimated 1.42[7] times the mass of the Sun and 1.4[8] times the Sun's radius. The star is around 3.67 billion years old,[9] and is spinning with a leisurely projected rotational velocity of 4.7 km/s.[6]
Iota2 Fornacis has a common proper motion companion, a magnitude 13.74 star at a position angle of 81.80 arcseconds along a position angle of 6°.[3] This object has about 35% of the Sun's mass.[7]