Xi2 Ceti
{{Short description|Star in the constellation Cetus}}
{{DISPLAYTITLE:Xi2 Ceti}}
{{other stars by Bayer designation|Xi Ceti{{!}}ξ Ceti}}
{{Starbox begin
| name = Xi2 Ceti
}}
{{Starbox observe
| epoch = J2000.0
| constell = Cetus
| dec = {{DEC|+08|27|36.2168}}
}}
{{Starbox character
| type =
| class = B9.5III or A0III-
| 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
}}
{{Starbox detail
| temperature = {{val|10630|400|fmt=commas}}
| metal_fe = {{val|−0.43|0.04}}
}}
{{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
}}
{{Starbox end}}
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=
| 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 }}
| 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 }}
| 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 }}
| 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 DR2|22745910577134848}}
}}
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 }}
{{Stars of Cetus}}