Alpha Canum Venaticorum

α^1,2 Canum Venaticorum
Data pengamatan; Epos J2000.0 Ekuinoks J2000.0
Rasi bintang	Canes Venatici
Asensio rekta	12h56m01.7s
Deklinasi	+38°19′06″
Magnitudo tampak (V)	+2.89/+5.61
Jarak	110 ± 4 ly; (34 ± 1 pc)
Tipe Spektral	F0V/A0pSiEuHg
Penamaan lain
	Cor Caroli, 12 Canum Venaticorum, HR 4914/4915, HD 112412/112413, BD+39°2580, FK5 485, HIP 63121/63125, SAO 63256/63257, GC 17556/17557, ADS 8706, CCDM 12560+3819

Cor Caroli (α CVn / α Canum Venaticorum / Alpha Canum Venaticorum, (nama lengkapnya adalah Cor Caroli Regis Martyris) adalah bintang yang paling cerah di rasi Canes Venatici. Bintang ini merupakan bintang ganda dengan magnitudo 2.81.^[1]. Bintang-bintangnya terpisah dengan jarak 19.6 arcsecond dan dapat dilihat oleh teleskop kecil. Bintang ini berada pada jarak 110 tahun cahaya dari Bumi.

Komponen utama, α² Canum Venaticorum, merupakan bintang dengan magnitudo yang bervariasi antara +2.84 dan +2.98 dalam periode waktu 5.47 days.^[2]. Tipe dari bintang ini adalah A0. Pasangannya, α¹ Canum Venaticorum, adalah bintang dengan kategori F0, dan bermagnitudo +5.5.

Etimologi

Nama tradisional dari bintang ini, Cor Caroli berarti jantung Charles, dan diberikan oleh Sir Charles Scarborough untuk menghormati raja Inggris, Charles I^[3]^[4], yang dieksekusi selama perang saudara di Inggris dan digantikan oleh anaknya, Charles II^[5]. Nama lain dari para astronom terdahulu adalah :

nama lain	asal bahasa	arti
常陳一	China	Pengawal Kerajaan di Istana</ref>salah satu rasi bintang menurut bangsa Cina</ref>

Selain rasi Canes Vanetici, bintang ini juga merupakan anggota dari berbagai rasi atau asterisma berikut :

nama rasi / asterisma	asal	arti	anggota lainnya
Diamond of Virgo		intan di Virgo	α Vir, β Leo, α Boö
常陳	China	Pengawal Kerajaan di Istana

References

^ Cor Caroli, Stars, Jim Kaler. Accessed on line September 15, 2008.
^ α² Canum Venaticorum, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250.
^ space.com: Spacewatch Friday: In Search of Star Cities, By Joe Rao
^ Ian Ridpath: "Star Tales", Canes Venatici
^ According to R. H. Allen (Star Names: Their Lore and Meaning), the star was named by Halley for Charles II "at the suggestion of the court physician Sir Charles Scarborough, who said it had shone with special brilliance on the eve of the king's return to London, May 29, 1660". According to Deborah J. Warner (The Sky Explored: Celestial Cartography 1500-1800), it was originally named "Cor Caroli Regis Martyris" ("The Heart of King Charles the Martyr") for Charles I. According to Robert Burnham, Jr. (Burnham's Celestial Handbook, Volume 1), "the attribution of the name to Halley appears in a report published by J. E. Bode at Berlin in 1801, but seems to have no other verification".

[1] Cor Caroli, Stars, Jim Kaler. Accessed on line September 15, 2008.

[2] α² Canum Venaticorum, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250.

[3] space.com: Spacewatch Friday: In Search of Star Cities, By Joe Rao

[4] Ian Ridpath: "Star Tales", Canes Venatici

[5] According to R. H. Allen (Star Names: Their Lore and Meaning), the star was named by Halley for Charles II "at the suggestion of the court physician Sir Charles Scarborough, who said it had shone with special brilliance on the eve of the king's return to London, May 29, 1660". According to Deborah J. Warner (The Sky Explored: Celestial Cartography 1500-1800), it was originally named "Cor Caroli Regis Martyris" ("The Heart of King Charles the Martyr") for Charles I. According to Robert Burnham, Jr. (Burnham's Celestial Handbook, Volume 1), "the attribution of the name to Halley appears in a report published by J. E. Bode at Berlin in 1801, but seems to have no other verification".

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