{{Short description|Double star in the constellation Taurus}} {{Starbox begin | name = ι Tauri }} {{Starbox image |image= {{Location mark |image=Taurus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=Iota Tauri |x=325|y=397 }} |caption=Location of ι Tauri (circled) }} {{Starbox observe | epoch = J2000 | constell = Taurus<ref name=XHIP/> | ra = {{RA|05|03|05.74725}}<ref name=vanLeeuwen2007>{{cite journal | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | last1=Van Leeuwen | first1=F. | s2cid=18759600 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2023497 Vizier catalog entry]</ref> | dec = {{DEC|+21|35|23.8627}}<ref name=vanLeeuwen2007/> | appmag_v = 4.62<ref name=XHIP>{{cite XHIP|23497}}</ref> }} {{Starbox character | type = main sequence<ref name=Zorec2012/> | class = A7&nbsp;V<ref name=Abt1995>{{cite journal | bibcode=1995ApJS...99..135A | title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars | journal=Astrophysical Journal Supplement | volume=99 | pages=135 | last1=Abt | first1=Helmut A. | last2=Morrell | first2=Nidia I. | year=1995 | doi=10.1086/192182 | doi-access=free }}</ref> | b-v = +0.16<ref name=Mallama2014>{{cite journal | bibcode=2014JAVSO..42..443M | title=Sloan Magnitudes for the Brightest Stars | journal=The Journal of the American Association of Variable Star Observers | volume=42 | pages=443 | last1=Mallama | first1=A. | year=2014 | issue=2 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/other/JAVSO/42.443/ugriz&HD=032301 Vizier catalog entry]</ref> | u-b = +0.15<ref name=Mallama2014/> }} {{Starbox astrometry | radial_v = +38.30<ref name=Gontcharov2006>{{Cite journal | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759–771| year=2006| last1=Gontcharov| first1=G. A.|arxiv = 1606.08053 | s2cid=119231169}}</ref> | prop_mo_ra = +68.88<ref name=vanLeeuwen2007/> | prop_mo_dec = -41.06<ref name=vanLeeuwen2007/> | parallax = 18.88 | p_error = 0.30 | parallax_footnote = <ref name=vanLeeuwen2007/> | absmag_v = 1.00<ref name=XHIP/> }} {{Starbox detail | mass = 2.22<ref name=Zorec2012>{{cite journal | arxiv=1201.2052 | bibcode=2012A&A...537A.120Z | doi=10.1051/0004-6361/201117691 | title=Rotational velocities of A-type stars | journal=Astronomy & Astrophysics | volume=537 | pages=A120 | year=2012 | last1=Zorec | first1=J. | last2=Royer | first2=F. | s2cid=55586789 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/537/A120/table1&HD=32301 Vizier catalog entry]</ref> | radius = 2.6<ref name=AllendePrieto>{{cite journal | bibcode=1999A&A...352..555A | arxiv=astro-ph/9911002 | title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures | journal=Astronomy and Astrophysics | volume=352 | pages=555–562 | last1=Allende Prieto | first1=C. | last2=Lambert | first2=D. L. | year=1999 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/352/555/table1&Name=HIP23497 Vizier catalog entry]</ref> | temperature = 8,054<ref name=Zorec2012/> | luminosity = 36<ref name=Zorec2012/> | rotational_velocity = 131<ref name=Zorec2012/> | gravity = 3.97<ref name=David2015>{{cite journal | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | 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 | year=2015 | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | s2cid=33401607 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/ApJ/804/146/table5&HIP=23497 Vizier catalog entry]</ref> | metal_fe = +0.15<ref name=XHIP/> | age_myr = 717<ref name=David2015/> }} {{Starbox catalog | names = {{odlist | B=ι&nbsp;Tau | F=102&nbsp;Tauri | BD=+21°751 | FK5=184 | HD=32301 | HIP=23497 | HR=1620 | SAO=76920 | GC=6158 | GSC=01293-02747 | WDS=J05031+2135AB }} }} {{Starbox reference | Simbad = Iota+Tauri }} {{Starbox end}}

'''Iota Tauri''', Latinized from ι Tauri, is a white-hued star in the zodiac constellation Taurus and an outlying member of the Hyades star cluster.<ref name=Varenne1999>{{citation | title=Chemical abundances of A and F-type stars: the Hyades open cluster | last1=Varenne | first1=O. | last2=Monier | first2=R. | journal=Astronomy and Astrophysics | volume=351 | pages=247–266 | date=November 1999 | bibcode=1999A&A...351..247V | postscript=. }}</ref> It is visible to the naked eye with an apparent visual magnitude of 4.62,<ref name=XHIP/> and is located at an estimated distance of about 173&nbsp;light years based upon parallax measurements.<ref name=vanLeeuwen2007/> The star is moving away from the Sun with a radial velocity of +38&nbsp;km/s.<ref name=Gontcharov2006/>

This has been reported as a double star with two components at separation 0.1", both of type A7V and magnitude 5.4.<ref name=WDS>{{cite journal | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466 | year=2001 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=B/wds/wds&WDS=05031%2B2135 Vizier catalog entry]</ref><ref name=Eggleton2008>{{cite journal | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | arxiv = 0806.2878 | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | year=2008 | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | doi-access=free | s2cid=14878976 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/MNRAS/389/869/table1&mHR=1620 Vizier catalog entry]</ref> The combined spectrum matches a stellar classification of A7&nbsp;V,<ref name=Abt1995/> which would normally indicate an A-type main-sequence star that is generating energy through hydrogen fusion at its core. It has an estimated age of 717<ref name=David2015/>&nbsp;million years.

In Chinese astronomy, the asterism Tiāngāo ({{lang|zh|天高}}, Celestial High Terrace) consists of the stars ι Tauri, 97 Tauri, 107 Tauri, and 109 Tauri.{{refn|Stellarium, citing Yi Shitong, 1981<ref name=Yi1981>{{cite book|script-title=zh:中西对照恒星图表|language=zh|trans-title=Atlas Comparing Chinese and Western Star Maps and Catalogues|last=Yi|first=Shitong|date=April 1981|publisher=科学出版社}}</ref>}} The Chinese name for ι Tauri itself is Tiāngāoyī ({{lang|zh|天高一}}), the first star of Tiāngāo.<ref name=AEEA>{{cite web |title=AEEA 天文教育資訊網 |trans-title=Activities of Exhibition and Education in Astronomy |language=zh |url=http://aeea.nmns.edu.tw/2006/0607/ap060713.html |archive-url=https://web.archive.org/web/20110716123228/http://aeea.nmns.edu.tw/2006/0607/ap060713.html |archive-date=16 July 2011 |url-status=dead}}</ref>

==References== {{reflist}}

{{Stars of Taurus}}

Category:A-type main-sequence stars Category:Hyades (star cluster) Tauri, Iota Category:Taurus (constellation) BD+21 0751 Tauri, 102 032301 023497 1620