Alpha Fornacis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 03h 12m 04.5298s |
| Declination | −28° 59′ 15.439″ |
| Apparent magnitude (V) | 3.80 (3.98/7.19) |
| Characteristics | |
| Spectral type | F6V + G7V |
| U−B color index | +0.082 |
| B−V color index | +0.581 |
| Astrometry | |
| Radial velocity (Rv) | −20.5 km/s |
| Proper motion (μ) | RA: +359.565 mas/yr Dec.: +619.186 mas/yr |
| Parallax (π) | 71.4337±0.1320 mas |
| Distance | 45.66 ± 0.08 ly (14.00 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.08 |
| Orbit | |
| Period (P) | 278±6 yr |
| Semi-major axis (a) | 4.03±0.05″ |
| Eccentricity (e) | 0.749±0.008 |
| Inclination (i) | 81.6±0.4° |
| Longitude of the node (Ω) | 117.1±0.2° |
| Periastron epoch (T) | 1,947.8±0.4 |
| Argument of periastron (ω) (secondary) | 44.7±1.0° |
| Details | |
| α For A | |
| Mass | 1.33±0.01 M☉ |
| Radius | 2.04±0.06 R☉ |
| Luminosity | 4.87±0.16 L☉ |
| Surface gravity (log g) | 4.27 cgs |
| Temperature | 6,240 K |
| Metallicity [Fe/H] | −0.20 dex |
| Rotational velocity (v sin i) | 3.9 km/s |
| Age | 2.9 Gyr |
| α For B | |
| Mass | 0.78 M☉ |
| Temperature | 5,040 K |
| Other designations | |
| α For, 12 Eridani, CD−29°1177, GJ 127, HD 20010, HIP 14879, HR 963, SAO 168373, LTT 1512, 2MASS J03120443-2859156 | |
| Database references | |
| SIMBAD | data |
Alpha Fornacis (α Fornacis, abbreviated Alpha For, α For) is a triple star system in the southern constellation of Fornax. It is the brightest star in the constellation and the only one brighter than magnitude 4.0. Based on parallax measurements obtained during the Gaia mission, it is 45.66 light-years distant.
Its three components are designated Alpha Fornacis A (officially named Dalim /ˈdeɪlɪm/), Alpha Fornacis Ba and Alpha Fornacis Bb.