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{{Inligtingskas ster
| naam= α Canum Venaticorum
{{Rooi sirkel
| x = 128
| y = 118
}}
| beeld= Canes Venatici IAU.svg
| onderskrif= Die ligging van α Canum Venaticorum (in die rooi sirkel).
| sterrebeeld= [[Jaghonde (sterrebeeld)|Jaghonde]]
| bayernaam= Alpha Canum Venaticorum
| spektraaltipe= '''α<sup>2</sup> CVn:''' A0pSiEuHg<ref>[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=V/50/catalog&recno=4915 HR 4915], database entry, The Bright Star Catalogue,  5de hersiene uitg., D. Hoffleit en W. H. Warren jr., [[Centre de Données astronomiques de Strasbourg|CDS]] ID [http://vizier.u-strasbg.fr/viz-bin/Cat?V/50 V/50]. Besoek op 2 November 2009.</ref> <br/>'''α<sup>1</sup> CVn:''' F2V<ref name=Gray>{{cite journal|bibcode=2003AJ....126.2048G|doi=10.1086/378365|arxiv=astro-ph/0308182|title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I|journal=The Astronomical Journal|volume=126|issue=4|pages=2048|year=2003|last1=Gray|first1=R. O.|last2=Corbally|first2=C. J.|last3=Garrison|first3=R. F.|last4=McFadden|first4=M. T.|last5=Robinson|first5=P. E.}}</ref>
| soort= [[Dubbelster]]
| RK= '''α<sup>2</sup> CVn:''' {{RK|12|56|01.66622}}<ref name=HIP>{{cite journal|title=Validation of the new Hipparcos reduction|url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL|author=van Leeuwen, F.|display-authors=etal|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}}</ref> <br>'''α<sup>1</sup> CVn:''' {{RK|12|56|00.43258}}<ref name=HIP/>
| Dek= '''α<sup>2</sup> CVn:''' {{Dek|+38|19|06.1541}}<ref name=HIP/> <br>'''α<sup>1</sup> CVn:''' {{Dek|+38|18|53.3768}}<ref name=HIP/>
| magnitude= 
| skynmagnitude= '''α<sup>2</sup> CVn:''' 2,84 tot 2,98<ref name=gcvs1>alf 2 CVn, databasis, [http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars] {{Webarchive|url=https://web.archive.org/web/20170620004609/http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat |date=20 Junie 2017 }}, Sternberg Astronomical Institute, Moskou, Rusland. Besoek op 2 November 2009.</ref><br>'''α<sup>1</sup> CVn:''' 5,6<ref name=Ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|author1=Ducati, J. R.|year=2002}}</ref>
| absolute magnitude= 
| B-V = 
| U-B = 
| massa= '''α<sup>2</sup> CVn:''' 2,97 ± 0,07<ref name=Kochukhov>{{cite journal|bibcode=2010A&A...513A..13K|doi=10.1051/0004-6361/200913860|arxiv=1002.0025|title=Magnetic Doppler imaging of α<sup>2</sup> Canum Venaticorum in all four Stokes parameters|journal=Astronomy and Astrophysics|volume=513|pages=A13|year=2010|last1=Kochukhov|first1=O.|last2=Wade|first2=G. A.}}</ref><br>'''α<sup>1</sup> CVn:''' 1,47 ± 0,15<ref name=AllendePrieto>{{cite journal|title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures|author1=Allende Prieto, C.|author2=Lambert, D. L.|journal=Astronomy and Astrophysics|volume=352|pages=555–562|date=1999|bibcode=1999A&A...352..555A|arxiv=astro-ph/9911002}}</ref>
| radius= '''α<sup>2</sup> CVn:''' 2,49 ± 0,26<ref name=Kochukhov/><br>'''α<sup>1</sup> CVn:''' 1,5<ref name=AllendePrieto/>
| ligsterkte= '''α<sup>2</sup> CVn:''' 101 ± 12<ref name=Kochukhov/>
| ouderdom= '''α<sup>2</sup> CVn:''' {{val|165|+60|-70}} miljoen<ref name=Kochukhov/>
| temperatuur= '''α<sup>2</sup> CVn:''' 11 600 ± 500<ref name=Kochukhov/><br>'''α<sup>1</sup> CVn:''' 7 080<ref name=AllendePrieto/>
| afstand= ~120
| rotasiespoed= '''α<sup>2</sup> CVn:''' 18,4 ± 0,5<ref name=Kochukhov/><br>'''α<sup>1</sup> CVn:''' 18<ref>{{cite journal|bibcode=2007A&A...463..671R|doi=10.1051/0004-6361:20065224|arxiv=astro-ph/0610785|title=Rotational velocities of A-type stars|journal=Astronomy and Astrophysics|volume=463|issue=2|pages=671|year=2007|last1=Royer|first1=F.|last2=Zorec|first2=J.|last3=Gómez|first3=A. E.}}</ref>
| fe-h= 
| veranderlik= '''α<sup>2</sup> CVn:''' [[Veranderlike ster#Magneetvelde|Alpha<sup>2</sup> Canum Venaticorum-veranderlike]]
| veelvoudig= 2
| planete= 
| name= α&nbsp;CVn, 12&nbsp;CVn, BD+39°&nbsp;2580, ADS&nbsp;8706 AB, CCDM&nbsp;J12560+3819B <br>'''α<sup>2</sup> CVn:''' α&nbsp;CVn&nbsp;A, 12&nbsp;CVn&nbsp;A, FK5&nbsp;485, GC&nbsp;17557, [[Henry Draper-katalogus|HD]]&nbsp;112413, [[Hipparcos|HIP]]&nbsp;63125, [[Bright Star Catalogue|HR]]&nbsp;4915, SAO&nbsp;63257. <br>'''α<sup>1</sup> CVn:''' CVn&nbsp;B, 12&nbsp;CVn&nbsp;B, GC&nbsp;17556, HD&nbsp;112412, HIP&nbsp;63121, HR&nbsp;4914, SAO&nbsp;63256.
}}

Die '''Cor Caroli'''-stelsel is ’n [[dubbelster]] met die [[Bayer-naam]] '''Alpha Canum Venaticorum''' (afgekort as '''α CVn'''). Die [[Internasionale Astronomiese Unie]] (IAU) gebruik die naam "Cor Caroli" spesifiek vir die helderste van die twee sterre.<ref name="IAU-CSN">{{cite web |url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt |title=IAU Catalog of Star Names |access-date=28 Julie 2016 |language=en |archive-url=https://web.archive.org/web/20200420015355/http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt |archive-date=20 April 2020 |url-status=live |df=dmy-all}}</ref> Alpha Canum Venaticorum is die helderste ligpunt in die noordelike [[sterrebeeld]] [[Jaghonde (sterrebeeld)|Jaghonde]] (Canes Venatici).

==Naam==
"Alpha Canum Venaticorum" is die stelsel se Bayer-naam. Die helderste ster word "α<sup>2</sup> Canum Venaticorum" genoem en die dofste een "α<sup>1</sup> Canum Venaticorum".<ref name=kaler>[http://www.astro.uiuc.edu/~kaler/sow/corcaroli.html Cor Caroli] {{webarchive|url=https://web.archive.org/web/20080704215122/http://www.astro.uiuc.edu/~kaler/sow/corcaroli.html |date=2008-07-04 }}, ''Stars'', Jim Kaler. Besoek op 15 September 2008.</ref>

Alpha Canum Venaticorum het die naam "Cor Caroli" in die 17de eeu gekry; dit beteken "Karel se Hart". Daar is onsekerheid oor na wie die ster genoem is: koning [[Karel I van Engeland]], wat in 1649 tereggestel is tydens die [[Engelse Burgeroorlog]], of sy seun, koning [[Karel II van Engeland|Karel II]], wat die Britse monargie in 1660 herstel het. 

==Eienskappe==
[[Beeld:Cor Caroli 2011-03-01.jpeg|thumb|links|Cor Caroli, soos op 1 Maart 2011 van Noord-Engeland af gesien.]]
Alpha Canum Venaticorum is ’n dubbelster met ’n gesamentlike [[skynbare magnitude]] van 2,81. Die twee sterre is 19,6 [[boogsekondes]] van mekaar af en kan maklik met ’n klein [[teleskoop]] uit mekaar geken word. Die stelsel is sowat 110&nbsp;[[ligjare]] van die [[Son]] af.

===α<sup>2</sup> CVn===
α<sup>2</sup> CVn is van [[spektraaltipe]] A0 en het ’n skynbare magnitude wat wissel tussen 2,84 en 2,98, met ’n tydperk van 5,47 dae.<ref name=gcvs1/> Dit is ’n uitsonderlike ster met ’n sterk [[magneetveld]], wat sowat 5&nbsp;000 keer so sterk soos die [[Aarde]] s’n is, en word geklassifiseer as ’n [[Ap/Bp-ster]].<ref name=hgs>"Cor Caroli", bl. 49, ''The hundred greatest stars'', James B. Kaler, Springer, 2002, {{ISBN|0-387-95436-8}}.</ref> Sy atmosfeer het ’n oorvloed van sekere [[element]]e soos [[silikon]], [[kwik]] en [[europium]]. Dit is vermoedelik omdat sekere elemente in die ster afsak onder die invloed van sy [[swaartekrag]], terwyl ander na die oppervlak styg vanweë [[stralingsdruk]].<ref name=kaler /><ref name=hgs /> Die ster is die prototipe van ’n klas [[veranderlike ster]]re wat [[Veranderlike ster#Magneetvelde|Alpha<sup>2</sup> Canum Venaticorum-veranderlikes]] genoem word. Daar word geglo dié sterre se sterk magneetveld veroorsaak enorme stervlekke. Vanweë dié stervlekke wissel die helderheid van Alpha<sup>2</sup> Canum Venaticorum-sterre aansienlik gedurende hulle rotasie.

===α<sup>1</sup> Canum Venaticorum===
α<sup>1</sup>&nbsp;Canum&nbsp;Venaticorum is ’n [[Sterreklassifikasie#Klas F|F-tipe]] [[hoofreeks]]ster. Dit is aansienlik dowwer as sy metgesel en het ’n skynbare magnitude van sowat 5,6.<ref name=Ducati/>

== Verwysings ==
{{Verwysings|2}}

==Eksterne skakels==
*[[Lêer:Crystal txt.png|15px]] Hierdie artikel is vertaal uit die [[:en:Cor Caroli|Engelse Wikipedia]]

[[Kategorie:Jaghonde (sterrebeeld)]]
[[Kategorie:Bayer-voorwerpe]]
[[Kategorie:Flamsteed-voorwerpe]]
[[Kategorie:Henry Draper-voorwerpe]]
[[Kategorie:Veranderlike sterre]]
[[Kategorie:Dubbelsterre]]
[[Kategorie:Sterre met eiename]]
[[Kategorie:A-tipe hoofreekssterre]]
[[Kategorie:F-tipe hoofreekssterre]]

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