Zeta Fornacis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 59m 36.18299s |
| Declination | −25° 16′ 26.8853″ |
| Apparent magnitude (V) | 5.67 |
| Characteristics | |
| Spectral type | F4 V |
| U−B color index | +0.01 |
| B−V color index | +0.39 |
| Astrometry | |
| Radial velocity (Rv) | +29.09±0.63 km/s |
| Proper motion (μ) | RA: +181.005 mas/yr Dec.: +84.641 mas/yr |
| Parallax (π) | 29.8975±0.0856 mas |
| Distance | 109.1 ± 0.3 ly (33.45 ± 0.10 pc) |
| Absolute magnitude (MV) | +3.14 |
| Details | |
| Mass | 1.8 M☉ |
| Radius | 1.62+0.02 −0.03 R☉ |
| Luminosity | 4.77±0.02 L☉ |
| Surface gravity (log g) | 4.16±0.14 cgs |
| Temperature | 6,699+65 −39 K |
| Metallicity [Fe/H] | +0.02 dex |
| Rotational velocity (v sin i) | 84.9±4.2 km/s |
| Age | 1.5 Gyr |
| Other designations | |
| ζ For, CD−25°1191, HD 18692, HIP 13942, HR 901, SAO 168209 | |
| Database references | |
| SIMBAD | data |
ζ Fornacis (often Latinised as Zeta Fornacis) is the Bayer designation for a star in the southern constellation of Fornax. It is faintly visible to the naked eye with an apparent visual magnitude of 5.67. Based upon a measured annual parallax shift of 29.9 mas, it is located at a distance of about 109 light-years from the Sun. The star is drifting further away with a radial velocity of +29 km/s. Positioned about 1.3° to the southeast of Zeta Fornacis is the galaxy NGC 1232.
This is an F-type main-sequence star with a stellar classification of F4 V. With an estimated age of 1.5 billion years, it has 1.8 times the mass of the Sun and 1.6 times the Sun's radius. The star is radiating 4.77 times the luminosity of the Sun from its photosphere at an effective temperature of 6,699 K. It is spinning with a projected rotational velocity of 84.9 km/s, and has a near-solar metallicity—what astronomers term the abundance of elements other than hydrogen and helium. This star is a probable member of the Hyades Stream—a group of stars that share a common motion through space with the Hyades cluster.
Zeta Fornacis has a common proper motion companion, NLTT 9563, a magnitude 13.50 star with a classification of M 2.5. As of 2004, this companion was positioned at an angular separation of 176.1 arcseconds along a position angle of 288.1°.