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| {{Starbox begin
| | The name of the writer is Jayson. To climb is some thing I really appreciate doing. He is an info officer. Her family life in Alaska but her spouse wants them to move.<br><br>Feel free to visit my homepage - best psychic ([http://cpacs.org/index.php?document_srl=90091&mid=board_zTGg26 just click the following document]) |
| | name = 15 Arietis
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| }}
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| {{Starbox observe
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| | epoch = J2000
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| | ra = {{RA|02|10|37.59642}}<ref name=aaa474_2_653/>
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| | dec = {{DEC|+19|30|01.2099}}<ref name=aaa474_2_653/>
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| | appmag_v = 5.74<ref name=mnras389_2_869/>
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| | constell = [[Aries (constellation)|Aries]]
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| }}
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| {{Starbox character
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| | class = M3 III<ref name=mnras400_4_1945/>
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| | r-i =
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| | v-r =
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| | b-v = +1.64<ref name=SIMBAD/>
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| | u-b = +1.91<ref name=SIMBAD/>
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| | variable = Pulsating
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| }}
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| {{Starbox astrometry
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| | radial_v = {{nowrap|+62.04 ± 0.22}}<ref name=aaa430_165/>
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| | prop_mo_ra = +87.88<ref name=aaa474_2_653/>
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| | prop_mo_dec = -27.82<ref name=aaa474_2_653/>
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| | parallax = 5.84
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| | p_error = 0.49
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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 = 67<ref name=lang2006/>
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| | luminosity =
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| | temperature =
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| | metal_fe =
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| | rotational_velocity =
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| | age_myr =
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| }}
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| {{Starbox catalog
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| | names = AV Arietis, [[Durchmusterung|BD]]+18 277, [[FK5]] 1056, [[Henry Draper Catalogue|HD]] 13325, [[Hipparcos Catalogue|HIP]] 10155, [[Bright Star Catalogue|HR]] 631, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 92822.<ref name=SIMBAD/>
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| }}
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| {{Starbox end}}
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| '''15 Arietis''' is the [[Flamsteed designation]] for a single<ref name=mnras389_2_869/> [[star]] in the northern [[constellation]] of [[Aries (constellation)|Aries]]. It has an [[apparent visual magnitude]] of 5.74,<ref name=mnras389_2_869/> which is just bright enough to be visible to the naked eye from [[Bortle Dark-Sky Scale|dark suburban skies]]. An annual [[parallax]] shift of 5.84 [[milliarcsecond|mas]]<ref name=aaa474_2_653/> corresponds to a physical distance of approximately {{Convert|560|ly|pc|abbr=off|lk=on}} from Earth. At that distance, the star's brightness is reduced by 0.33<ref name=aaa430_165/> in magnitude because of [[extinction (astronomy)|extinction]] from [[interstellar medium|interstellar gas and dust]].
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| This is a [[red giant]] star with a [[stellar classification]] of M3 III.<ref name=mnras400_4_1945/> The measured [[angular diameter]] of this star is {{nowrap|3.67 ± 0.11 mas}}.<ref name=aaa431_773/> At the estimated distance of Delta Ophiuchi,<ref name=aaa474_2_653/> this yields a physical size of about 67 times the [[Solar radius|radius of the Sun]].<ref name=lang2006/> It is a [[pulsating variable]] star with the [[variable star designation]] AV Arietis. The first pulsation period is 18.1 days with an amplitude of 0.028 magnitudes, while the second is 21.9 days and 0.030 in magnitude.<ref name=mnras400_4_1945/>
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| ==References==
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| {{reflist|refs=
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| <ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | 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=mnras400_4_1945>{{citation | display-authors=1 | last1=Tabur | first1=V. | last2=Bedding | first2=T. R. | last3=Kiss | first3=L. L. | last4=Moon | first4=T. T. | last5=Szeidl | first5=B. | last6=Kjeldsen | first6=H. | title=Long-term photometry and periods for 261 nearby pulsating M giants | journal=Monthly Notices of the Royal Astronomical Society | volume=400 | issue=4 | pages=1945–1961 | doi=10.1111/j.1365-2966.2009.15588.x | bibcode=2009MNRAS.400.1945T | postscript=. |arxiv = 0908.3228 |date=December 2009}}</ref>
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| <ref name=mnras389_2_869>{{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 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. |date=September 2008}}</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 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R | postscript=. |date=February 2005}}</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 | postscript=. }}. The radius (R<sub>*</sub>) is given by:
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| :<math>\begin{align} 2\cdot R_*
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| & = \frac{(170\cdot 3.67\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
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| & \approx 134\cdot R_{\bigodot}
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| \end{align}</math></ref>
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| <ref name=SIMBAD>{{citation | title=AV Ari -- Semi-regular pulsating Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=15+Arietis | accessdate=2012-07-18 | 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%20631 HR 631]
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| * [http://aladin.u-strasbg.fr/AladinPreview?-c=02+10+37.6%2B19+30+01&ident=V*+AV+Ari&submit=Aladin+previewer Image 15 Arietis]
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| {{Stars of Aries}}
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| [[Category:Henry Draper Catalogue objects|13325]]
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| [[Category:Hipparcos objects|010155]]
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| [[Category:Flamsteed objects|Arietis, 15]]
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| [[Category:Aries (constellation)]]
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| [[Category:M-type main-sequence stars]]
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