Cor Caroli 1880852 224824523 2008-07-10T16:09:37Z Kbdankbot 6505923 Robot - move category per [[WP:CFD|CFD]] [[Wikipedia:Categories for discussion/Log/2008 July 2|2008 July 2]] {{Starbox short | | name=α<sup>1,2</sup> Canum Venaticorum | epoch=[[J2000.0]] | constell=[[Canes Venatici]] | ra=12<sup>h</sup>56<sup>m</sup>01.7<sup>s</sup> | dec=+38°19′06″ | spectral=F0V/A0pSiEuHg | appmag_v=+2.89/+5.61 | dist_ly=110 ± 4 | dist_pc=34 ± 1 | names=Cor Caroli, 12&nbsp;Canum Venaticorum, [[Harvard Revised catalogue|HR]]&nbsp;4914/4915, [[Henry Draper Catalogue|HD]]&nbsp;112412/112413, [[Bonner Durchmusterung|BD]]+39°2580, [[Fifth Fundamental Catalogue|FK5]]&nbsp;485, [[Hipparcos catalogue|HIP]]&nbsp;63121/63125, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;63256/63257, GC&nbsp;17556/17557, [[Star catalogue#ADS|ADS]]&nbsp;8706, CCDM&nbsp;12560+3819 }} '''Cor Caroli''' (&alpha; CVn / &alpha; Canum Venaticorum / [[Alpha (letter)|Alpha]] Canum Venaticorum, originally known by the more elaborate ''Cor Caroli Regis Martyris'') is the brightest [[star]] in the northern [[constellation]] [[Canes Venatici]]. The name ''Cor Caroli'' means ''Charles' heart'', and was named by [[Sir Charles Scarborough]] in honour of [[Charles I of England|Charles I]]<ref>[http://www.space.com/spacewatch/hunting_dog_020517.html space.com: Spacewatch Friday: In Search of Star Cities, By Joe Rao]</ref><ref>[http://www.ianridpath.com/startales/canesvenatici.htm Ian Ridpath: "Star Tales", Canes Venatici]</ref>, who was executed in the aftermath of the [[English Civil War]], and otherwise associated to [[Charles II of England]], his son, who was restored to the throne after the [[interregnum]] following his father's death. Cor Caroli is a [[binary star]] which has a combined [[apparent magnitude]] of +2.89. The two stars are 19.6 [[arcsecond]]s apart on the sky and are easily resolved in small telescopes. It is approximately 110 [[light year]]s from [[Earth]]. The main star, '''α² Canum Venaticorum''', is the prototype of a class of [[variable star]]s, the so-called [[α² Canum Venaticorum star]]s. These stars have a strong [[magnetic field]], which is believed to produce starspots of enormous extent. Due to these starspots the brightness of α² Canum Venaticorum stars varies considerably during their rotation. The brightness of α² Canum Venaticorum varies between +2.84 [[apparent magnitude|magnitude]] and +2.94 with a period of 5.47 days. Its [[stellar classification|spectral type]] is A0. The companion, '''α¹ Canum Venaticorum''', of spectral type F0, is considerably fainter at +5.5 magnitude. Cor Caroli marks the northern vertex of the [[Diamond of Virgo]] [[asterism (astronomy)|asterism]]. ==References== <references/> [[Category:Bayer objects|Canum Venaticorum, Alpha]] [[Category:Canes Venatici constellation]] [[Category:Alpha2 Canum Venaticorum variables]] [[Category:Binary stars]] [[Category:A-type main sequence stars]] [[Category:F-type main sequence stars]] [[Category:Stars with proper names]] [[ca:Cor Caroli]] [[de:Cor Caroli]] [[el:Καρδία Καρόλου]] [[es:Cor Caroli]] [[fr:Alpha2 Canum Venaticorum]] [[ko:코르 카롤리]] [[it:Cor Caroli]] [[lb:Cor Caroli (Stär)]] [[nl:Cor Caroli]] [[ja:コル・カロリ]] [[pl:Cor Caroli]] [[ru:Сердце Карла]] [[sk:Cor Caroli]] [[fi:Alfa Canum Venaticorum]] [[zh:常陳一]]