Global InformationAlpha Fornacis information
 Location of α Fornacis (upper left). | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 3h 12m 04.5277s[1] |
| Declination | –28° 59′ 15.425″[1] |
| Apparent magnitude (V) | 3.85[2] (3.98/7.19)[3] |
| Characteristics | |
| Spectral type | F8IV[4] |
| U−B color index | +0.082[5] |
| B−V color index | +0.581[5] |
| Astrometry | |
| Radial velocity (Rv) | –20.5[6] km/s |
| Proper motion (μ) | RA: 371.49[1] mas/yr Dec.: 612.28[1] mas/yr |
| Parallax (π) | 71.4337 ± 0.1320 mas[7] |
| Distance | 45.66 ± 0.08 ly (14.00 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.08[8] |
| Orbit[3] | |
| Period (P) | 269 yr |
| Semi-major axis (a) | 4.0″ |
| Eccentricity (e) | 0.73 |
| Inclination (i) | 81° |
| Longitude of the node (Ω) | 117° |
| Periastron epoch (T) | 1947 |
| Argument of periastron (ω) (secondary) | 43° |
| Details | |
| α For A | |
| Mass | 1.33 ± 0.01[9] M☉ |
| Radius | 2.04 ± 0.06[10] R☉ |
| Luminosity | 4.87 ± 0.16[10] L☉ |
| Surface gravity (log g) | 4.27[9] cgs |
| Temperature | 6,240[9] K |
| Metallicity [Fe/H] | –0.20[9] dex |
| Rotational velocity (v sin i) | 3.9[10] km/s |
| Age | 2.9[11] Gyr |
| Other designations | |
α For, 12 Eridani, CD−29° 1177, GJ 127, HD 20010, HIP 14879, HR 963, SAO 168373, LTT 1512, 2MASS J03120443-2859156[2] | |
| Database references | |
| SIMBAD | data |
Alpha Fornacis (α Fornacis, abbreviated Alpha For, α For) is a triple star[12] 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 Hipparcos mission, it is approximately 46 light-years (14 parsecs) distant from the Sun.
Its three components are designated Alpha Fornacis A (officially named Dalim /ˈdeɪlɪm/),[13] Alpha Fornacis Ba and Alpha Fornacis Bb.
- ^ a b c d Cite error: The named reference
hipparcoswas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ a b Hartkopf, W. I.; et al. (June 30, 2006), Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory, archived from the original on 2017-08-01, retrieved 2017-06-02.
- ^ Cite error: The named reference
aaa323was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
aaass47was invoked but never defined (see the help page). - ^ Cite error: The named reference
rgcrcwas invoked but never defined (see the help page). - ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ Cite error: The named reference
Holmberg2009was invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
aaa373was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
mnras405_3_1907was invoked but never defined (see the help page). - ^ Cite error: The named reference
aaa418was invoked but never defined (see the help page). - ^ Cite error: The named reference
Fuhrmann2016was invoked but never defined (see the help page). - ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.