| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 59m 36.18299s [1] |
| Declination | −25° 16′ 26.8853″ [1] |
| Apparent magnitude (V) | 5.67 [2] |
| Characteristics | |
| Spectral type | F4 V [3] |
| U−B color index | +0.01 [2] |
| B−V color index | +0.39 [2] |
| Astrometry | |
| Radial velocity (Rv) | +29.09±0.63 [1] km/s |
| Proper motion (μ) |
RA: +181.005
[1]
mas/
yr Dec.: +84.641 [1] mas/ yr |
| Parallax (π) | 29.8975 ± 0.0856 mas [1] |
| Distance | 109.1 ± 0.3
ly (33.45 ± 0.10 pc) |
| Absolute magnitude (MV) | +3.14 [4] |
| Details | |
| Mass | 1.8 [5] M☉ |
| Radius | 1.62+0.02 −0.03 [1] R☉ |
| Luminosity | 4.77±0.02 [1] L☉ |
| Surface gravity (log g) | 4.16±0.14 [5] cgs |
| Temperature | 6,699+65 −39 [1] K |
| Metallicity [Fe/H] | +0.02 [3] dex |
| Rotational velocity (v sin i) | 84.9±4.2 [4] km/s |
| Age | 1.5 [5] Gyr |
| Other designations | |
| 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. [2] Based upon a measured annual parallax shift of 29.9 mas, [1] 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. [1] Positioned about 1.3° to the southeast of Zeta Fornacis is the galaxy NGC 1232. [7]
This is an F-type main-sequence star with a stellar classification of F4 V. [3] With an estimated age of 1.5 billion years, it has 1.8 [5] times the mass of the Sun and 1.6 [1] 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. [1] It is spinning with a projected rotational velocity of 84.9 km/s, [4] and has a near-solar metallicity—what astronomers term the abundance of elements other than hydrogen and helium. [3] This star is a probable member of the Hyades Stream [8]—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 [9] star with a classification of M 2.5. [10] As of 2004, this companion was positioned at an angular separation of 176.1 arcseconds along a position angle of 288.1°. [9]
References
- ^ a b c d e f g h i j k l m 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.
- ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode: 1986EgUBV........0M.
- ^ a b c d 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.
- ^ a b c 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.
- ^ a b c d 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.
- ^ "zet For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-01-22.
- ^ 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.
- ^ 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.
- ^ a b 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.
- ^ 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.
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 59m 36.18299s [1] |
| Declination | −25° 16′ 26.8853″ [1] |
| Apparent magnitude (V) | 5.67 [2] |
| Characteristics | |
| Spectral type | F4 V [3] |
| U−B color index | +0.01 [2] |
| B−V color index | +0.39 [2] |
| Astrometry | |
| Radial velocity (Rv) | +29.09±0.63 [1] km/s |
| Proper motion (μ) |
RA: +181.005
[1]
mas/
yr Dec.: +84.641 [1] mas/ yr |
| Parallax (π) | 29.8975 ± 0.0856 mas [1] |
| Distance | 109.1 ± 0.3
ly (33.45 ± 0.10 pc) |
| Absolute magnitude (MV) | +3.14 [4] |
| Details | |
| Mass | 1.8 [5] M☉ |
| Radius | 1.62+0.02 −0.03 [1] R☉ |
| Luminosity | 4.77±0.02 [1] L☉ |
| Surface gravity (log g) | 4.16±0.14 [5] cgs |
| Temperature | 6,699+65 −39 [1] K |
| Metallicity [Fe/H] | +0.02 [3] dex |
| Rotational velocity (v sin i) | 84.9±4.2 [4] km/s |
| Age | 1.5 [5] Gyr |
| Other designations | |
| 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. [2] Based upon a measured annual parallax shift of 29.9 mas, [1] 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. [1] Positioned about 1.3° to the southeast of Zeta Fornacis is the galaxy NGC 1232. [7]
This is an F-type main-sequence star with a stellar classification of F4 V. [3] With an estimated age of 1.5 billion years, it has 1.8 [5] times the mass of the Sun and 1.6 [1] 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. [1] It is spinning with a projected rotational velocity of 84.9 km/s, [4] and has a near-solar metallicity—what astronomers term the abundance of elements other than hydrogen and helium. [3] This star is a probable member of the Hyades Stream [8]—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 [9] star with a classification of M 2.5. [10] As of 2004, this companion was positioned at an angular separation of 176.1 arcseconds along a position angle of 288.1°. [9]
References
- ^ a b c d e f g h i j k l m 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.
- ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode: 1986EgUBV........0M.
- ^ a b c d 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.
- ^ a b c 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.
- ^ a b c d 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.
- ^ "zet For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-01-22.
- ^ 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.
- ^ 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.
- ^ a b 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.
- ^ 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.