| absmag_v = −3.21[13]
}}{{Starbox orbit
| reference = [14]
| period_unitless = 972.162 d
| axis_unitless = {{Solar radius|link=y|905}}
| eccentricity = {{nowrap|0.3973 ± 0.0007}}
| inclination = 87.0
| node =
| periastron = RJD 53039.9 ± 0.10
| periarg = {{nowrap|328.9° ± 0.13}}
| k1 = {{nowrap|23.17 ± 0.02}}
}}{{Starbox detail
| component1 = ζ Aur A
| mass = {{nowrap|4.94 ± 0.79}}[15]
| radius =
| luminosity = 3,254[15]
| temperature = 3,920[17]
| metal_fe = –0.26[17]
| gravity = 1.33[17]
| rotational_velocity = 68[20]
| age_myr =
| component2 = ζ Aur B
| mass2 = 4.8[14]
}}{{Starbox catalog
| names = Saclateni, ζ Aur, 8 Aurigae, BD+40°1142, FK5 1137, HD 32068, HIP 23453, HR 1612, SAO 39966, WDS 05025+4105.[22]
}}{{Starbox reference
| Simbad=zet+Aur
}}{{Starbox end}}Zeta Aurigae (ζ Aurigae, abbreviated Zeta Aur, ζ Aur), is a binary star in the northern constellation of Auriga. Based upon parallax measurements made during the Hipparcos mission, this system is approximately {{Convert|790|ly|pc|abbr=off|lk=on}} distant from the sun. It has a combined apparent visual magnitude of 3.75,[3] which is bright enough to be seen with the naked eye.
The two components are designated Zeta Aurigae A (also named Saclateni[2]) and B.
Nomenclature
ζ Aurigae (Latinised to Zeta Aurigae) is the system's Bayer designation. The designations of the two components as ζ Aurigae A and B derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[3]The system bore the traditional names Haedus I (also Hoedus) and Sadatoni (rarely Saclateni). It was one of the two haedi (Latin: 'kids') of the she-goat Capella, the other being Haedus II, Eta Aurigae. The name Sadatoni is from the Arabic الساعد الثاني as-sācid aθ-θānī "the second arm (of the charioteer)". The rare traditional name Azaleh is shared (in the form Hassaleh) with Iota Aurigae.[4] In 2016, the IAU organized a Working Group on Star Names (WGSN)[5] to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.[6] It approved the names Saclateni for the component Zeta Aurigae A and Haedus for Eta Aurigae on 30 June 2017 and they are both now so included in the List of IAU-approved Star Names.[2]
In Chinese, {{lang|zh|柱}} ({{lang|zh-Latn|Zhù}}), meaning Pillars, refers to an asterism consisting of Zeta Aurigae, Epsilon Aurigae, Eta Aurigae, Upsilon Aurigae, Nu Aurigae, Tau Aurigae, Chi Aurigae and 26 Aurigae.[7] Consequently, Zeta Aurigae itself is known as {{lang|zh|柱二}} ({{lang|zh-Latn|Zhù èr}}, {{lang-en|the Second Star of Pillars}}.)[8]
Properties
Zeta Aurigae is an eclipsing binary with the orbital plane being oriented close to the line of sight from the Earth; the inclination of this system is estimated as 87.0°.[14] As a result, an eclipse of one star by the other occurs during each orbit, causing the magnitude to decrease to +3.99. The pair have an orbital period of 972 days (2.66 years) and an eccentricity of 0.4.[14] The primary component, Zeta Aurigae A, has been categorized as a K-type bright giant or supergiant star. Its companion, Zeta Aurigae B, is a B-type main sequence star of stellar classification B5 V or B7 V.[14][5]
References
1. ^1 {{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S|volume=1|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}
2. ^1 {{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |accessdate=16 December 2017}}
3. ^{{cite arXiv |title=On the naming convention used for multiple star systems and extrasolar planets |date=2010 |eprint=1012.0707 |class=astro-ph.SR |last1= Hessman |first1=F. V. |last2= Dhillon |first2=V. S. |last3= Winget |first3=D. E. |last4= Schreiber |first4=M. R. |last5= Horne |first5=K. |last6= Marsh |first6=T. R. |last7= Guenther |first7=E. |last8= Schwope |first8=A. |last9= Heber |first9=U. }}
4. ^{{Cite web|url=http://stars.astro.illinois.edu/sow/alkab.html|title=Al Kab|website=stars.astro.illinois.edu|access-date=2017-02-02}}
5. ^{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|accessdate=22 May 2016}}
6. ^{{cite web | url=https://www.iau.org/static/science/scientific_bodies/working_groups/280/wg-starnames-triennial-report-2015-2018.pdf | page=5 | title=WG Triennial Report (2015-2018) - Star Names |accessdate=2018-07-14}}
7. ^{{zh icon}} 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.
8. ^{{zh icon}} 香港太空館 - 研究資源 - 亮星中英對照表 {{webarchive |url=https://web.archive.org/web/20110129031951/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_h_l.htm |date=January 29, 2011 }}, Hong Kong Space Museum. Accessed on line November 23, 2010.
9. ^1 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
10. ^1 2 {{citation | last1=Shenavrin | first1=V. I. | last2=Taranova | first2=O. G. | last3=Nadzhip | first3=A. E. | title=Search for and study of hot circumstellar dust envelopes | journal=Astronomy Reports | volume=55 | issue=1 | pages=31–81 |date=January 2011 | doi=10.1134/S1063772911010070 | bibcode=2011ARep...55...31S | postscript=. }}
11. ^1 2 3 {{citation | last1=McWilliam | first1=Andrew | title=High-resolution spectroscopic survey of 671 GK giants | journal=Astrophysical Journal Supplement Series |date=December 1990 | volume=74 | pages=1075–1128 | format=PDF | url=http://adsabs.harvard.edu/doi/10.1086/191527 | bibcode=1990ApJS...74.1075M | doi=10.1086/191527 | postscript=. }} origin: STI
12. ^1 {{citation | last=Wilson | first=R. E. | date=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institute of Washington, D.C. | bibcode=1953GCRV..C......0W | postscript=. }}
13. ^1 {{citation | last1=Bernacca | first1=P. L. | last2=Perinotto | first2=M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | date=1970 | bibcode=1970CoAsi.239....1B | postscript=. }}
14. ^1 2 3 4 {{citation | last1=Kiyokawa | first1=M. | title=Photoelectric Observation of Zeta Aurigae during the 1963-64 Eclipse | journal=Publications of the Astronomical Society of Japan | volume=19 | page=209 | date=1967 | bibcode=1967PASJ...19..209K | postscript=. }}
15. ^1 2 {{citation | last1=Hohle | first1=M. M. | last2=Neuhäuser | first2=R. | last3=Schutz | first3=B. F. | title=Masses and luminosities of O- and B-type stars and red supergiants | journal=Astronomische Nachrichten | volume=331 | issue=4 | page=349 |date=April 2010 | doi=10.1002/asna.200911355 | bibcode=2010AN....331..349H | arxiv=1003.2335 | postscript=. }}
16. ^1 2 3 4 5 {{citation | last1=Eaton | first1=Joel A. | last2=Henry | first2=Gregory W. | last3=Odell | first3=Andrew P. | title=Orbits and Pulsations of the Classical ζ Aurigae Binaries | journal=The Astrophysical Journal | volume=679 | issue=2 | pages=1490–1498 |date=June 2008 | doi=10.1086/587452 | bibcode=2008ApJ...679.1490E | postscript=. |arxiv = 0802.2238 }}
17. ^1 {{cite simbad | title=zet Aur | accessdate=2012-08-19 | postscript=. }}