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

| ra = {{RA|02|59|42.89987}}

| dec = {{DEC|+08|54|26.4899}}

| appmag_v = 4.71

| constell = Cetus

}}

{{Starbox character

| type =

| class = B6III

| b-v = {{val|−0.109|0.006}}

| u-b = −0.471

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|10.2|2.8}}

| prop_mo_ra = {{val|6.01|0.26}}

| prop_mo_dec = {{val|−17.70|0.29}}

| parallax = 5.66

| p_error = 0.24

| parallax_footnote =

| absmag_v = −1.52

}}

{{Starbox detail

| mass = {{val|5.01|0.05}}

| radius = 5.4

| luminosity = 652

| temperature = {{val|13940|710|fmt=commas}}

| metal_fe =

| rotational_velocity = 131

| age_myr = 100-125

}}

{{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=

{{cite simbad

| title = lam Cet

| access-date = 2010-09-30}}

{{citation

| 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 }}

{{citation | postscript=.

| 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}}

{{cite journal

| 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 ]

{{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 | s2cid=119257644 | postscript=. }}

{{cite journal

| 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 }}

{{citation

| 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 }}

{{cite web

| 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}}

{{citation

| 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}}

Category:B-type giants

Category:Cetus

Ceti, Lambda

BD+08 0455

Ceti, 91

018604

013954

0896