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| {{Starbox begin
| | Hi there. Let me begin by introducing the author, her title is Sophia Boon but she by no means truly liked that title. The favorite pastime for him and his children is to play [http://appin.co.kr/board_Zqtv22/688025 free psychic] lacross and he'll be beginning something else alongside with it. Some time in the past she selected to live in Alaska and her mothers and fathers live close by. Office supervising is certified psychics - [http://formalarmour.com/index.php?do=/profile-26947/info/ formalarmour.com] - where my primary earnings comes from but I've usually wanted my own business.<br><br>my website: [https://www-ocl.gist.ac.kr/work/xe/?document_srl=605236 love psychic] |
| | name=7 Arietis
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| }}
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| {{Starbox observe
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| | epoch=J2000
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| | ra={{RA|01|55|51.03925}}<ref name=aaa474_2_653/>
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| | dec={{DEC|+23|34|38.3465}}<ref name=aaa474_2_653/>
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| | appmag_v=5.76<ref name=aaa431_773/>
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| | constell=[[Aries (constellation)|Aries]]
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| }}
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| {{Starbox character
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| | class=K1 III<ref name=mnras389_2_869/>
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| | r-i =
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| | v-r =
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| | b-v = +1.185<ref name=SIMBAD/>
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| | u-b = +1.04<ref name=SIMBAD/>
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| | variable=
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| }}
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| {{Starbox astrometry
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| | radial_v=+15.95<ref name=aaa430_165/>
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| | prop_mo_ra=+11.44<ref name=aaa474_2_653/>
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| | prop_mo_dec=-10.05<ref name=aaa474_2_653/>
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| | parallax=5.85
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| | p_error=0.46
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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=21<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={{nowrap|1.8 ± 1.0}}<ref name=aaa395_97/>
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| | age_myr=
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| }}
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| {{Starbox catalog
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| | names=RR Arietis, [[Durchmusterung|BD]]+22 284, [[FK5]] 2130, [[Henry Draper Catalogue|HD]] 11763, [[Hipparcos Catalogue|HIP]] 8993, [[Bright Star Catalogue|HR]] 559, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 75030.<ref name=SIMBAD/>
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| }}
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| {{Starbox end}}
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| '''7 Arietis''' is the [[Flamsteed designation]] for a [[binary star]]<ref name=mnras389_2_869/> system in the northern [[constellation]] of [[Aries (constellation)|Aries]]. The pair have a combined [[apparent visual magnitude]] of 5.76,<ref name=aaa431_773/> making it [[Bortle Dark-Sky Scale|faintly visible]] to the naked eye from dark suburban skies. Based upon an annual [[parallax]] shift of 5.85 [[milliarcsecond|mas]],<ref name=aaa474_2_653/> it is approximately {{Convert|560|ly|pc|abbr=off|lk=on}} distant from the Earth, give or take a 40 light-year [[margin of error]].
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| This is an [[eclipsing binary]] system with a period of 47.9 days and has the [[variable star designation]] RR Arietis. During each eclipse of the primary star, the magnitude of the system decreases by 0.40. The eclipse of the secondary reduces the magnitude by 0.35.<ref name=aaa446_2_785/> The primary component of the system is an [[stellar evolution|evolved]] [[giant star]] with a [[stellar classification]] of K1 III.<ref name=mnras389_2_869/> The measured [[angular diameter]] of this star is {{nowrap|1.14 ± 0.02 [[milliarcsecond|mas]]}}.<ref name=aaa431_773/> At the estimated distance of 7 Arietis,<ref name=aaa474_2_653/> this yields a physical size of about 21 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 | 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=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 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}</ref>
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| <ref name=aaa446_2_785>{{citation | display-authors=1 | last1=Malkov | first1=O. Yu. | last2=Oblak | first2=E. | last3=Snegireva | first3=E. A. | last4=Torra | first4=J. | title=A catalogue of eclipsing variables | journal=Astronomy and Astrophysics | volume=446 | issue=2 | pages=785–789 |date=February 2006 | doi=10.1051/0004-6361:20053137 | bibcode=2006A&A...446..785M | 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 | 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 1.14\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
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| & \approx 42\cdot R_{\bigodot}
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| \end{align}</math></ref>
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| <ref name=aaa395_97>{{citation | display-authors=1 | last1=De Medeiros | first1=J. R. | last2=Udry | first2=S. | last3=Burki | first3=G. | last4=Mayor | first4=M. | title=A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars | journal=Astronomy and Astrophysics | volume=395 | pages=97–98 |date=November 2002 | doi=10.1051/0004-6361:20021214 | bibcode=2002A&A...395...97D | postscript=. }}</ref>
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| <ref name=SIMBAD>{{citation | title=RR Ari -- Variable Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=7+Arietis | accessdate=2012-07-18 | postscript=. }}</ref> | |
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| ==External links==
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| * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%20559 HR 559]
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| * [http://aladin.u-strasbg.fr/AladinPreview?-c=01+55+51.0397%2B23+34+38.358&ident=V*+RR+Ari&submit=Aladin+previewer Image 7 Arietis]
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| {{Stars of Aries}}
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| [[Category:Henry Draper Catalogue objects|11763]]
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| [[Category:Hipparcos objects|08993]]
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| [[Category:Flamsteed objects|Arietis, 7]]
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| [[Category:Objects named with variable star designations|Arietis, RR]]
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| [[Category:Aries (constellation)]]
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| [[Category:K-type giants]]
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| [[Category:Eclipsing binaries]]
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Hi there. Let me begin by introducing the author, her title is Sophia Boon but she by no means truly liked that title. The favorite pastime for him and his children is to play free psychic lacross and he'll be beginning something else alongside with it. Some time in the past she selected to live in Alaska and her mothers and fathers live close by. Office supervising is certified psychics - formalarmour.com - where my primary earnings comes from but I've usually wanted my own business.
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