Xi2 Ceti

{{other stars by Bayer designation|Xi Ceti{{!}}ξ Ceti}}

{{Starbox begin

| name = Xi² Ceti

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cetus

| ra = {{RA|02|28|09.55706}}

| dec = {{DEC|+08|27|36.2168}}

| appmag_v = +4.279

}}

{{Starbox character

| type =

| class = B9.5III or A0III-

| b-v = {{val|−0.053|0.003}}

| u-b = −0.137

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|11.90|1.3}}

| prop_mo_ra = {{val|23.707|0.844}}

| prop_mo_dec = {{val|-4.787|0.778}}

| parallax = 16.5681

| p_error = 0.4608

| parallax_footnote =

| absmag_v = +0.45

}}

{{Starbox detail

| mass = 2.45

| radius = {{val|2.60|0.17}}

| gravity = {{val|4.00|0.25}}

| luminosity = 80.13

| temperature = {{val|10630|400|fmt=commas}}

| metal_fe = {{val|−0.43|0.04}}

| rotational_velocity = 55

| age_myr = 127

}}

{{Starbox catalog

| names = {{odlist | B=ξ² Cet | F=73 Ceti | HD=15318 | HR=718 | HIP=11484 | BD=+07°388 | SAO=110543 }}

}}

{{Starbox reference

| Simbad = 73+Cet

}}

Xi² Ceti, Latinized from ξ² Ceti, is a star located in the equatorial constellation of Cetus. It is visible to the naked eye with an apparent visual magnitude of +4.3. This star is located at a distance of approximately 197 light years from the Sun based on parallax, and is drifting further away with a radial velocity of 12 km/s. It made its closest approach some 2.7 million years ago at a distance of around {{convert|39.25|pc|ly|0|abbr=off|disp=out}}.

Xi² Ceti is a spectrophotometric standard star. It displays a stellar classification of B9.5III, which suggests it has exhausted its core hydrogen, evolved away from the main sequence, and expanded to become a giant star, although still only 127 million years old. It has 2.45 times the mass and 2.6 times the radius of the Sun.

In Chinese, {{lang|zh|天囷}} ({{lang|zh-Latn|Tiān Qūn}}), meaning Circular Celestial Granary, refers to an asterism consisting of α Ceti, κ¹ Ceti, λ 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 Xi² Ceti itself is "the Sixth Star of Circular Celestial Granary", {{lang|zh-Latn|Tiān Qūn Liù}}.{{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 }}

References

{{reflist|refs=

{{Cite journal

| title=Angular Sizes, Radii, and Effective Temperatures of B-type Stars from Optical Interferometry with the CHARA Array

| display-authors=1 | last1=Gordon | first1=Kathryn D.

| last2=Gies | first2=Douglas R. | last3=Schaefer | first3=Gail H.

| last4=Huber | first4=Daniel | last5=Ireland | first5=Michael

| journal=The Astrophysical Journal

| volume=873 |issue=1 |page=91 | year=2019

| bibcode=2019ApJ...873...91G | doi=10.3847/1538-4357/ab04b2 | doi-access=free }}

{{Cite journal

| title=A study of the bright A stars. I. A catalogue of spectral classifications

| last1=Cowley | first1=A. | last2=Cowley | first2=C.

| last3=Jaschek | first3=M. | last4=Jaschek | first4=C.

| display-authors=1 | journal=Astronomical Journal

| volume=74 | pages=375–406 | date=April 1969

| doi=10.1086/110819 | bibcode=1969AJ.....74..375C }}

{{Cite journal

| last1=Gontcharov | first1=G. A.

| title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system

| journal=Astronomy Letters

| volume=32 | issue=11 | pages=759–771 | date=November 2006

| doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G

| arxiv=1606.08053 | s2cid=119231169 }}

{{cite journal

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015 | s2cid=119257644 }}

{{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 | year=2009 | arxiv=0903.5134 | bibcode=2009A&A...501..297Z | doi=10.1051/0004-6361/200811147 | s2cid=14969137 }}

{{cite journal|bibcode=1999PASP..111.1426B|title=Spectrophotometry: Revised Standards and Techniques|journal=Publications of the Astronomical Society of the Pacific|volume=111|issue=765|pages=1426–1433|last1=Bessell|first1=Michael S.|year=1999|doi=10.1086/316454|doi-access=free}}

{{cite journal|bibcode=1987ApJS...65..581G|title=The Early A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation|journal=The Astrophysical Journal Supplement Series|volume=65|pages=581|last1=Gray|first1=R. O.|last2=Garrison|first2=R. F.|year=1987|doi=10.1086/191237|doi-access=free}}

{{cite journal|bibcode=2015ApJ...804..146D|title=The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets|journal=The Astrophysical Journal|volume=804|issue=2|pages=146|last1=David|first1=Trevor J.|last2=Hillenbrand|first2=Lynne A.|year=2015|doi=10.1088/0004-637X/804/2/146|arxiv=1501.03154|s2cid=33401607}}

}}

External links

{{cite web | url=http://stars.astro.illinois.edu/sow/xi2cet.html | first=James B. | last=Kaler | date=Dec 17, 2007 | work=STARS | title=Xi-2 Ceti | access-date=2021-04-03 }}
http://server3.wikisky.org/starview?object_type=1&object_id=889
http://www.alcyone.de/cgi-bin/search.pl?object=HR0718 {{Webarchive|url=https://web.archive.org/web/20160303224848/http://www.alcyone.de/cgi-bin/search.pl?object=HR0718 |date=2016-03-03 }}

Category:B-type giants

Category:Cetus

Ceti, Xi2

Category:Durchmusterung objects