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| {{DISPLAYTITLE:Psi<sup>2</sup> Aurigae}}
| | Royal Votaw is my title but I never truly liked that title. What she loves performing is playing croquet and she is attempting to make it a profession. Arizona is her birth location and she will by no means transfer. Managing people is how I make money and it's something I truly appreciate.<br><br>Also visit my website: [http://Www.farebook.us/index.php?do=/profile-7229/info/ http://Www.farebook.us] |
| :''For other star systems with this [[Bayer designation]], see [[Psi Aurigae]].''
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| {{Starbox begin
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| | name=Psi<sup>2</sup> Aurigae
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| }}
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| {{Starbox image
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| | image =
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| <div style="position: relative">[[File:Auriga IAU.svg|250px|alt=Diagram showing star positions and boundaries of the Auriga constellation and its surroundings]]
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| <div style="position: absolute; left: 29.8%; top: 34.2%;">[[File:Cercle rouge 100%.svg|12px]]</div>
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| </div>
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| | caption = The location of ψ<sup>2</sup> Aurigae (circled)
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| }}
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| {{Starbox observe
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| | epoch = J2000
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| | ra = {{RA|06|39|19.82634}}<ref name=aaa474_2_653/>
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| | dec = {{DEC|+42|29|19.9617}}<ref name=aaa474_2_653/>
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| | appmag_v = 4.79<ref name=clpl4_99/>
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| | constell = [[Auriga (constellation)|Auriga]]
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| }}
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| {{Starbox character
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| | class = K3 III<ref name=apj121_118/> or K3 Iab:<ref name=aj125_6_3311/>
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| | r-i = 0.6
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| | v-r =
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| | b-v = +1.23<ref name=clpl4_99/>
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| | u-b = +1.30<ref name=clpl4_99/>
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| | variable =
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| }}
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| {{Starbox astrometry
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| | radial_v = {{nowrap|16.09 ± 0.19}}<ref name=aaa430_165/>
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| | prop_mo_ra = -0.87<ref name=aaa474_2_653/>
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| | prop_mo_dec = -54.97<ref name=aaa474_2_653/>
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| | parallax = 7.84
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| | p_error = 0.29
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| | parallax_footnote = <ref name=aaa474_2_653/>
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| | absmag_v =
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| }}
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| {{Starbox detail
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| | mass =
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| | radius = 27<ref name=lang2006/>
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| | luminosity =
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| | temperature = 4,410<ref name=apjss74/>
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| | metal_fe = –0.10<ref name=apjss74/>
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| | gravity = 2.30<ref name=apjss74/>
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| | rotational_velocity = 1.0<ref name=aaa363_239/>
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| | age_myr =
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| }}
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| {{Starbox catalog
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| | names = 50 Aurigae, [[Bonner Durchmusterung|BD]]+42 1585, [[Henry Draper Catalogue|HD]] 47174, [[Hipparcos Catalogue|HIP]] 31832, [[Bright Star Catalogue|HR]] 2427, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 41239.<ref name=SIMBAD/>
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| }}
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| {{Starbox end}}
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| '''Psi<sup>2</sup> Aurigae''' (ψ<sup>2</sup> Aur, ψ<sup>2</sup> Aurigae) is a [[star]] in the [[constellation]] [[Auriga (constellation)|Auriga]]. It is faintly visible to the naked eye with an [[apparent visual magnitude]] of 4.79.<ref name=clpl4_99/> Based upon [[parallax]] measurements, this star is approximately {{Convert|420|ly|pc|abbr=off|lk=on}} away from the Earth. At that distance, the brightness of the star is diminished by 0.07 in magnitude from [[extinction (astronomy)|extinction]] caused by [[interstellar medium|interstellar gas and dust]].<ref name=aaa430_165/>
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| Most studies categorized this as a [[K-type star|K-type]] [[giant star]] with a [[stellar classification]] of K3 III.<ref name=apj121_118/> However, the results of a study published in 2003 list it with a classification of K3 Iab:, which would instead suggest it is a [[supergiant star]].<ref name=aj125_6_3311/><ref name=SIMBAD/> The measured [[angular diameter]] of this star, after correction for [[limb darkening]], is {{nowrap|1.97 ± 0.02 [[milliarcsecond|mas]]}}.<ref name=aaa431_773/> At the estimated distance of this star,<ref name=aaa474_2_653/> this yields a physical size of about 27 times the [[Solar radius|radius of the Sun]].<ref name=lang2006/>
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| ==References==
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| {{reflist|refs=
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| <ref name=aaa474_2_653>{{citation | first1=Floor | last1=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | arxiv=0708.1752v1 | doi=10.1051/0004-6361:20078357 | journal=Astronomy and Astrophysics | postscript=. }} ''Note:'' see VizieR catalogue [http://vizier.u-strasbg.fr/viz-bin/Cat?I/311 I/311].</ref>
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| <ref name=apjss74>{{citation | last=McWilliam | first=Andrew | title=High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances | journal=Astrophysical Journal Supplement Series | volume=74 | pages=1075–1128 |date=December 1990 | doi=10.1086/191527 | bibcode=1990ApJS...74.1075M | postscript=. }}</ref>
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| <ref name=apj121_118>{{citation | last1=Herbig | first1=George H. | last2=Spalding | first2=John F., Jr. | title=Axial Rotation and Line Broadening in Stars of Spectral Types F0-K5 | journal=Astrophysical Journal | volume=121 | page=118 |date=January 1955 | doi=10.1086/145969 | bibcode=1955ApJ...121..118H | postscript=. }}</ref>
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| <ref name=aaa430_165>{{citation | display-authors=1 | last1=Famaey | first1=B. | last2=Jorissen | first2=A. | last3=Luri | first3=X. | last4=Mayor | first4=M. | last5=Udry | first5=S. | last6=Dejonghe | first6=H. | last7=Turon | first7=C. | title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters | journal=Astronomy and Astrophysics | volume=430 | issue=1 | pages=165–186 |date=January 2005 | doi=10.1051/0004-6361:20041272 | bibcode=2005A&A...430..165F | arxiv=astro-ph/0409579 | postscript=. }}</ref>
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| <ref name=aaa431_773>{{citation | last1=Richichi | pages=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | pages=773–777 |date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R | postscript=. }}</ref>
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| <ref name=lang2006>{{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3 | publisher=Birkhäuser | year=2006 | isbn=3-540-29692-1 | url=http://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R<sub>*</sub>) is given by:
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| :<math>\begin{align} 2\cdot R_*
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| & = \frac{(128\cdot 1.97\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
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| & \approx 54\cdot R_{\bigodot}
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| \end{align}</math></ref>
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| <ref name=aj125_6_3311>{{citation | last1=Kidger | first1=Mark R. | last2=Martín-Luis | first2=Fabiola | title=High-Precision Near-Infrared Photometry of a Large Sample of Bright Stars Visible from the Northern Hemisphere | journal=The Astronomical Journal | volume=125 | issue=6 | pages=3311–3333 |date=June 2003 | doi=10.1086/374996 | bibcode=2003AJ....125.3311K4 | postscript=. }}</ref>
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| <ref name=clpl4_99>{{citation | last1=Johnson | display-authors=1 | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | bibcode=1966CoLPL...4...99J | postscript=. }}</ref>
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| <ref name=aaa363_239>{{citation | display-authors=1 | last1=De Medeiros | first1=J. R. | last2=do Nascimento | first2=J. D., Jr. | last3=Sankarankutty | first3=S. | last4=Costa | first4=J. M. | last5=Maia | first5=M. R. G. | title=Rotation and lithium in single giant stars | journal=Astronomy and Astrophysics | volume=363 | pages=239–243 |date=November 2000 | bibcode=2000A&A...363..239D | postscript=. |arxiv = astro-ph/0010273 }}</ref>
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| <ref name=SIMBAD>{{citation | title=50 Aur -- Star in double system| work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+47174 | accessdate=2012-08-24 | postscript=. }}</ref>
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| }}
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| ==External links==
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| * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%202427 HR 2427]
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| * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J06394%2b4229A CCDM J06394+4229]
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| * [http://aladin.u-strasbg.fr/AladinPreview?-c=*++50+Aur&ident=*++50+Aur&submit=Aladin+previewer Image Psi<sup>2</sup> Aurigae]
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| {{Stars of Auriga}}
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| [[Category:Henry Draper Catalogue objects|47174]]
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| [[Category:Hipparcos objects|031832]]
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| [[Category:Bayer objects|Aurigae, Psi<sup>2</sup>]]
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| [[Category:Auriga (constellation)]]
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| [[Category:K-type giants]]
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Royal Votaw is my title but I never truly liked that title. What she loves performing is playing croquet and she is attempting to make it a profession. Arizona is her birth location and she will by no means transfer. Managing people is how I make money and it's something I truly appreciate.
Also visit my website: http://Www.farebook.us