| 词条 | Upsilon Ceti |
| 释义 |
| name = υ Ceti }}{{Starbox image | image={{Location mark |image=Cetus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=υ Cet |x=421|y=662 }} |caption=Location of υ Ceti (circled) }}{{Starbox observe | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Cetus | ra = {{RA|02|00|00.30916}}[1] | dec = {{DEC|−21|04|40.1946}}[1] | appmag_v = 3.95[3] }}{{Starbox character | class = M0III[4] | b-v = +1.57[3] | u-b = +1.90[3] | r-i = | variable = }}{{Starbox astrometry | radial_v = {{Val|+18.00|0.70}}[7] | prop_mo_ra = +134.92[1] | prop_mo_dec = −24.59[1] | parallax = 11.14 | p_error = 0.18 | parallax_footnote = [1] | absmag_v = −0.77[11] }}{{Starbox detail | source = [12] | mass = {{Val|1.26|0.13}} | radius = {{Val|53.56|11.80}} | luminosity = {{Val|549.6|226.8}} | temperature = {{Val|3822|148|fmt=commas}} | gravity = {{Val|1.15|0.18}} | metal_fe = {{Val|−0.06|0.10}} | rotational_velocity = | age_gyr = {{Val|6.97|2.77}} }}{{Starbox catalog | names = υ Cet, 59 Cet, BD−21° 358, FK5 71, HD 12274, HIP 9347, HR 585, SAO 167471.[13] }}{{Starbox reference | Simbad = ups+Cet }}{{Starbox end}} Upsilon Ceti, Latinized from υ Ceti, is a solitary[14] star in the equatorial constellation of Cetus. It is visible to the naked eye with an apparent visual magnitude of 3.95.[3] Based upon an annual parallax shift of 11.14 mas,[1] it is located about 293 light years from the Sun. This star was designated Upsilon Ceti by Bayer and 59 Ceti by Flamsteed. Flamsteed also gave it the designation Upsilon2 Ceti to distinguish it from 56 Ceti, which he called Upsilon1. Flamsteed's superscripted designations, however, are not in general use today.[1] For ancient Arabic astronomers, this star with η Cet (Deneb Algenubi), θ Cet (Thanih al Naamat), τ Cet (Durre Menthor) and ζ Cet (Baten Kaitos), formed Al Naʽāmāt (النعامات), the Hen Ostriches[18] In Chinese, {{lang|zh|鈇鑕}} ({{lang|zh-Latn|Fū Zhì}}), meaning Sickle, refers to an asterism consisting of υ Ceti, 48 Ceti and 56 Ceti.[2] Consequently, υ Ceti itself is known as {{lang|zh|鈇鑕四}} ({{lang|zh-Latn|Fū Zhì sì}}, {{lang-en|the Fourth Star of Sickle}}.)[3] Upsilon Ceti is a evolved red giant star with a stellar classification of M0III and is listed as a standard for that class.[4] The star has previously been classified as K5/M0III, an interesting example of one of the "gaps" in the Morgan-Keenan classification system, with K6-9 often not used for giant stars or used only to indicate a fraction of the way between K5 and M0.[4] There is an 84% chance that it is on the red giant branch, or 16% to be on the horizontal branch. Stellar models based on the red giant branch status yield an estimated mass of around 126% of the Sun's mass and 54 times the radius of the Sun. This model indicates the star radiates around 550 times the solar luminosity from its outer atmosphere at an effective temperature of 3,822 K.[12] References1. ^{{cite book |last=Wagman |first=Morton |date=2003 |title=Lost Stars |publisher=The McDonald & Woodward Publishing Company |page=106 |isbn=0-939923-78-5 }} [4][5][6][7][8][9][10][11][12]2. ^{{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}}. 3. ^{{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 10 日 4. ^1 2 3 4 5 6 {{citation | title=Validation of the new Hipparcos reduction | 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 | postscript=. }} 5. ^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=. }} 6. ^1 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }} 7. ^1 {{citation | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | postscript=. }} 8. ^1 2 {{citation | title=Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity | display-authors=1 | last1=Reffert | first1=Sabine | last2=Bergmann | first2=Christoph | last3=Quirrenbach | first3=Andreas | last4=Trifonov | first4=Trifon | last5=Künstler | first5=Andreas | journal=Astronomy and Astrophysics | volume=574A | issue=2 | pages=116–129 | date=2015 | bibcode=2015A&A...574A.116R | doi=10.1051/0004-6361/201322360 | arxiv=1412.4634 | postscript=. | hdl=10722/215277}} 9. ^1 2 3 4 {{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV data | year=1986 | publisher=SIMBAD | bibcode=1986EgUBV........0M | postscript=. }} 10. ^1 2 3 {{cite journal | bibcode=1989ApJS...71..245K | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | author1=Keenan | first1=Philip C | last2=McNeil | first2=Raymond C | year=1989 | doi=10.1086/191373 }} 11. ^1 {{citation | title=ups Cet -- Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=ups+Cet | accessdate=2017-02-12 | postscript=. }} 12. ^1 {{citation | last=Allen | first=R. H. | date=1963 | authorlink=Richard Hinckley Allen | title=Star Names: Their Lore and Meaning | url=http://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Cetus*.html | accessdate=2010-12-12 | edition=Reprint | publisher=Dover Publications Inc. | location=New York | isbn=0-486-21079-0 | page=162 }} }} External links
| title=Upsilon Ceti | publisher=University of Illinois | first1=James B. | last1=Kaler | work=Stars | date=November 4, 2011 | url=http://stars.astro.illinois.edu/sow/upscet.html | accessdate=2017-02-13 | postscript=. }}
8 : Cetus (constellation)|Bayer objects|K-type giants|Flamsteed objects|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |
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