{{Short description|Star in the constellation Taurus}} {{DISPLAYTITLE:Omega<sup>2</sup> Tauri}} {{other stars by Bayer designation|Omega Tauri{{!}}ω Tauri}} {{Starbox begin | name = Omega<sup>2</sup> 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=Omega2 Tauri |x=620|y=430 }} | caption = Location of ω<sup>2</sup> Tauri (circled in red) }} {{Starbox observe | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Taurus | ra = {{RA|04|17|15.66155}}<ref name=vanLeeuwen2007/> | dec = {{DEC|+20|34|42.9340}}<ref name=vanLeeuwen2007/> | appmag_v = +4.914<ref name=Hog2000/> }} {{Starbox character | class = A3m<ref name=Tetzlaff2011/> | b-v = +0.259<ref name=Zuckerman2013/> | u-b = | variable = }} {{Starbox astrometry | radial_v = {{Val|+15.0|0.6}}<ref name=deBruijne2012/> | prop_mo_ra = −39.41<ref name=vanLeeuwen2007/> | prop_mo_dec = −60.79<ref name=vanLeeuwen2007/> | parallax = 34.55 | p_error = 0.38 | parallax_footnote = <ref name=vanLeeuwen2007/> | absmag_v = +2.62<ref name=Anderson2012/> }} {{Starbox detail | source = | mass = {{Val|1.9|0.1}}<ref name=Tetzlaff2011/> | radius = {{Val|1.514|0.044}}<ref name=masana2006/> | luminosity = 6.6<ref name=Mcdonald2012/> | temperature = {{Val|7541|137|fmt=commas}}<ref name=masana2006/> | gravity = | metal_fe = | rotational_velocity = 70.1<ref name=Zuckerman2013/> | age_myr = 100<ref name=Zuckerman2013/> }} {{Starbox catalog | names = {{odlist | B=ω<sup>2</sup> Tau | F=50 Tau | BD=+20°724 | FK5= | HD=27045 | HIP=19990 | HR=1329 | SAO=76532 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = ome02+Tau }} {{Starbox end}} '''Omega<sup>2</sup> Tauri''' is a solitary,<ref name=Eggleton2008/> white hued star in the zodiac constellation of Taurus. It has an apparent visual magnitude of +4.9,<ref name=Hog2000/> which is bright enough to be seen with the naked eye at night. The distance to this system, as determined using an annual parallax shift of 34.55 mas as seen from the Earth,<ref name=vanLeeuwen2007/> is about 94 light years. The position of this star near the ecliptic means it is subject to lunar occultation.<ref name=Herr_1969/>
This is a young Am star with an age of around 100 million<ref name=Zuckerman2013/> years and a stellar classification of A3m.<ref name=Tetzlaff2011/> It displays an infrared excess emission, indicating the presence of an orbiting debris disk with a mean temperature of 99 K.<ref name=Su2006/> This star is a probable member of the Octans Near association, a nearby moving group of stars that share a common motion through space.<ref name=Zuckerman2013/>
==References== <references> <ref name=vanLeeuwen2007>{{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 | s2cid=18759600 | postscript=. }}</ref>
<ref name=masana2006>{{citation | display-authors=1 | last1=Masana | first1= E. | last2=Jordi | first2=C. | last3=Ribas | first3=I. | title=Effective temperature scale and bolometric corrections from 2MASS photometry | journal=Astronomy and Astrophysics | postscript=. | volume=450 | issue=2 | pages=735 | year=2006 | bibcode=2006A&A...450..735M | doi=10.1051/0004-6361:20054021 |arxiv = astro-ph/0601049 | s2cid=15278668 }}</ref>
<ref name=Mcdonald2012>{{citation | postscript=. | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | doi-access=free | s2cid=118665352 }}</ref>
<ref name=Hog2000>{{citation | title=The Tycho-2 catalogue of the 2.5 million brightest stars | journal=Astronomy and Astrophysics | display-authors=1 | last1=Høg | first1=E. | last2=Fabricius | first2=C. | last3=Makarov | first3=V. V. | last4=Urban | first4=S. | last5=Corbin | first5=T. | last6=Wycoff | first6=G. | last7=Bastian | first7=U. | last8=Schwekendiek | first8=P. | last9=Wicenec | first9=A. | volume=355 | pages=L27 | year=2000 | bibcode=2000A&A...355L..27H | postscript=. }}</ref>
<ref name=Zuckerman2013>{{citation | title=Young Stars near Earth: The Octans-Near Association and Castor Moving Group | last1=Zuckerman | first1=B. | last2=Vican | first2=Laura | last3=Song | first3=Inseok | last4=Schneider | first4=Adam | journal=The Astrophysical Journal | display-authors=1 | volume=778 | issue=1 | id=5 | pages=12 | date=November 2013 | doi=10.1088/0004-637X/778/1/5 | bibcode=2013ApJ...778....5Z | arxiv=1309.2318 | s2cid=118446756 | postscript=. }}</ref>
<ref name=deBruijne2012>{{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 | s2cid=59451347 | postscript=. }}</ref>
<ref name=Su2006>{{citation | display-authors=1 | last1=Su | first1=K. Y. L. | last2=Rieke | first2=G. H. | last3=Stansberry | first3=J. A. | last4=Bryden | first4=G. | last5=Stapelfeldt | first5=K. R. | last6=Trilling | first6=D. E. | last7=Muzerolle | first7=J. | last8=Beichman | first8=C. A. | last9=Moro-Martin | first9=A. | title=Debris Disk Evolution around A Stars | journal=The Astrophysical Journal | volume=653 | issue=1 | pages=675–689 | date=December 2006 | doi=10.1086/508649 | bibcode=2006ApJ...653..675S | arxiv=astro-ph/0608563 | s2cid=14116473 | postscript=. }}</ref>
<ref name=Eggleton2008>{{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 | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | arxiv=0806.2878 | s2cid=14878976 | postscript=. }}</ref>
<ref name=Tetzlaff2011>{{citation | display-authors=1 | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | issue=1 | pages=190–200 | date=January 2011 | doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | bibcode=2011MNRAS.410..190T | arxiv=1007.4883 | s2cid=118629873 | postscript=. }}</ref>
<ref name=Anderson2012>{{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=. }}</ref>
<ref name=SIMBAD>{{cite simbad | title=ome02 Tau | access-date=2017-06-30 }}</ref>
<ref name=Herr_1969>{{citation | postscript=. | title=Identification List of Spectroscopic and Eclipsing Binaries Subject to Occultations by the Moon | last=Herr | first=Richard B. | journal=Publications of the Astronomical Society of the Pacific | volume=81 | issue=479 | page=105 | date=April 1969 | doi=10.1086/128748 | bibcode=1969PASP...81..105H }}</ref> </references>
{{Stars of Taurus|state=collapsed}}
Tauri, Omega Category:Taurus (constellation) BD+20 0724 Tauri, 50 027045 019990 1329 Category:Am stars