Lambda Ceti
{{Short description|Star in the constellation Cetus}}
{{Starbox begin}}
{{Starbox image
| image =
{{Location mark
| image=Cetus_IAU.svg
| float=center | width=280 | position=right
| mark=Red circle.svg | mark_width=10 | mark_link=λ Cet
| x%=26.0 | y%=16.2
}}
| caption = Location of Lambda Ceti (circled)
}}
{{Starbox observe
| epoch = J2000
| dec = {{DEC|+08|54|26.4899}}
| constell = Cetus
}}
{{Starbox character
| type =
| variable =
}}
{{Starbox astrometry
| prop_mo_ra = {{val|6.01|0.26}}
| prop_mo_dec = {{val|−17.70|0.29}}
| parallax = 5.66
| p_error = 0.24
}}
{{Starbox detail
| temperature = {{val|13940|710|fmt=commas}}
| metal_fe =
}}
{{Starbox catalog
| names = {{odlist | name=Menkar | B=λ Cet | F=91 Cet | HR=896 | BD=+08°455 | HD=18604 | FK5=1083 | HIP=13954 | SAO=110889 }}
}}
{{Starbox reference
| Simbad = lam+cet
}}
{{Starbox end}}
Lambda Ceti, Latinized from λ Ceti, is a B-type star of fifth-magnitude located in the constellation Cetus. Historically, the star bore the traditional name Menkar, although today that name is more commonly associated with α Ceti.
This star, along with α Cet (Menkar), γ Cet (Kaffaljidhma), δ Cet, μ Cet, ξ1 Cet and ξ2 Cet were Al Kaff al Jidhmah, "the Part of a Hand".[https://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Cetus*.html Star Name - R.H. Allen p.160]
In Chinese, {{lang|zh|天囷}} ({{lang|zh-Latn|Tiān Qūn}}), meaning Circular Celestial Granary, refers to an asterism consisting of λ Ceti, α Ceti, κ1 Ceti, μ Ceti, ξ1 Ceti, ξ2 Ceti, ν Ceti, γ Ceti, δ Ceti, 75 Ceti, 70 Ceti, 63 Ceti and 66 Ceti. Consequently, the Chinese name for λ Ceti itself is {{lang|zh|天囷三}} ({{lang|zh-Latn|Tiān Qūn sān}}, {{langx|en|the Third Star of Circular Celestial Granary}}.){{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0607/ap060711.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 11 日] {{Webarchive|url=https://web.archive.org/web/20120204114123/http://aeea.nmns.edu.tw/2006/0607/ap060711.html |date=2012-02-04 }}
Properties
Lambda Ceti is a blue giant star with stellar classification B6III. With five times the mass of the Sun and an estimated radius that is {{Solar radius|link=y|5.4}}, the star radiates a bolometric luminosity of about {{Solar luminosity|link=y|920}}. In 1997 the Hipparcos satellite estimated its parallax at 7.69 ± 0.76 milliarcseconds yielding a distance from Earth of about 130 ± 10 parsecs or 420 ± 40 light years. However recent astrometric calculations by van Leeuwen have placed the distance much farther at about 177 ± 7 pc or 580 ± 20 ly—a revaluation which significantly altered other stellar parameters. Its apparent magnitude has been recently recalibrated at 4.6767 yielding an absolute magnitude of -1.56, almost as bright as its neighbor Alpha Ceti at -1.62.
References
{{reflist|refs=
| title = lam Cet
| access-date = 2010-09-30}}
| last1=Gontcharov | first1=G. A.
| title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system
| journal=Astronomy Letters | postscript=.
| volume=32| issue=11| pages=759–771| date=November 2006
| doi=10.1134/S1063773706110065| bibcode=2006AstL...32..759G
| arxiv=1606.08053 | s2cid=119231169 }}
| last=Lesh | first=Janet Rountree
| title=The Kinematics of the Gould Belt: an Expanding Group?
| journal=Astrophysical Journal Supplement
| volume=17 | page=371 | date=December 1968
| doi=10.1086/190179 | bibcode=1968ApJS...17..371L | doi-access=free}}
| title=Validation of the new Hipparcos reduction
| url=http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html
| last1=van Leeuwen | first1=F.
| journal=Astronomy and Astrophysics
| volume=474 | issue=2 | pages=653–664 | date=2007
| arxiv=0708.1752 | bibcode=2007A&A...474..653V
| doi=10.1051/0004-6361:20078357 | s2cid=18759600
}}[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=13920 Vizier catalog entry ]
| 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 | s2cid=119257644 | postscript=. }}
| title=Fundamental parameters of B supergiants from the BCD system. I. Calibration of the (λ_1, D) parameters into Teff
| url=http://www.aanda.org/articles/aa/full_html/2009/25/aa11147-08/aa11147-08.html
| last1=Zorec | first1=J. | last2=Cidale | first2=L.
| last3=Arias | first3=M. L. | last4=Frémat | first4=Y.
| last5=Muratore | first5=M. F. | last6=Torres | first6=A. F.
| last7=Martayan | first7=C. | display-authors=1
| journal=Astronomy and Astrophysics
| volume=501 | issue=1 | pages=297–320 | date=2009
| arxiv=0903.5134 | bibcode=2009A&A...501..297Z
| doi=10.1051/0004-6361/200811147 | s2cid=14969137 }}
| display-authors=1 | 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 | postscript=.
| volume=331 | issue=4 | page=349 | date=April 2010
| doi=10.1002/asna.200911355 | bibcode=2010AN....331..349H
| arxiv=1003.2335 | s2cid=111387483 }}
| title=LAMBDA CET (Lambda Ceti, the former "Menkar")
| publisher=University of Illinois
| first=James B. | last=Kaler | author-link=James B. Kaler
| url=http://stars.astro.illinois.edu/sow/lambdacet.html
| access-date=2010-09-30}}
| last1=Simón-Díaz | first1=S. | last2=Godart | first2=M.
| last3=Castro | first3=N. | last4=Herrero | first4=A.
| last5=Aerts | first5=C. | last6=Puls | first6=J.
| last7=Telting | first7=J. | last8=Grassitelli | first8=L.
| display-authors=1 | postscript=.
| title=The IACOB project. III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars
| journal=Astronomy & Astrophysics
| volume=597 | id=A22 | pages=17 | date=January 2017
| doi=10.1051/0004-6361/201628541 | s2cid=3478126
| bibcode=2017A&A...597A..22S | arxiv=1608.05508 }}
}}
{{Stars of Cetus}}