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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°.

References

1. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
3. ^ Gray, R. O.; et al. (2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–70, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
4. ^ Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
5. ^ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
6. "zet For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-01-22.
7. Bakich, Michael E. (2010), 1,001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers, The Patrick Moore Practical Astronomy Series, Springer Science & Business Media, p. 400, ISBN 978-1441917775.
8. Eggen, O. J. (June 1985), "A systematic search for members of the Hyades Supercluster. IV - The metallic-line stars and ultrashort-period Cepheids", Astronomical Journal, 90: 1046−1059, Bibcode:1985AJ.....90.1046E, doi:10.1086/113812.
9. ^ Gould, Andrew; Chanamé, Julio (February 2004), "New Hipparcos-based Parallaxes for 424 Faint Stars", The Astrophysical Journal Supplement Series, 150 (2): 455−464, arXiv:astro-ph/0309001, Bibcode:2004ApJS..150..455G, doi:10.1086/381147, S2CID 8494577.
10. Scholz, R.-D.; et al. (October 2005), "Search for nearby stars among proper motion stars selected by optical-to-infrared photometry. III. Spectroscopic distances of 322 NLTT stars", Astronomy and Astrophysics, 442 (1): 211−227, arXiv:astro-ph/0507284, Bibcode:2005A&A...442..211S, doi:10.1051/0004-6361:20053004, S2CID 7013323.

v t e Constellation of Fornax
List of stars in Fornax Fornax in Chinese astronomy Chandra Deep Field South Hubble Legacy Field
Stars	Bayer α (Dalim) β γ γ δ ε ζ η η η ι ι κ λ λ μ ν π ρ σ τ υ φ χ χ χ ψ ω Variable R TZ UZ HR 683 858 HD 15337 20781 20782 20868 (Intan) Other 2MASS J02431371−2453298 HIP 13044 LP 944-20 UDF 2457 WASP-72 (Diya)
Exoplanets HD 16417 b HD 20781 b c d e HD 20782 b HD 20868 b (Baiduri) TOI-849 b
Star clusters NGC 1049
Nebulae NGC 1360
Galaxies	NGC 823 824 922 986 1097 1210 1255 1288 1310 1316 1317 1318 1326 1350 1365 1374 1375 1379 1380 1381 1387 1398 1399 1406 1425 1427 Other Fornax Dwarf HUDF-JD2 GS-NDG-9422 IC 335 IC 1993 JADES-GS-z14-0 JADES-GS-z7-01-QU MRC 0316-257 PGC 13809 UDF 423 UDFj-39546284 UDFy-38135539
Galaxy clusters Fornax Cluster
Astronomical events SN 1992bd SN 1999eu SN 2003B
Category

• F-type main-sequence stars
• Double stars
• Hyades Stream
• Fornax
• Bayer objects
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects