Cor Caroli

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Cor Caroli

(kor ka -rŏ-lÿ) (α CVn) A bluish-white star that is the brightest one in the constellation Canes Venatici, Its name means ‘Charles's Heart’ and was given to it by Edmund Halley in honor of the English King Charles II. It is a visual binary (separation 20″), the brighter component (A or α² CVn) being the prototype of the spectrum variable stars. It has a period of 5.469 days and its spectrum shows strong profuse lines of rare earths, iron-peak elements, and silicon. m_v : 2.9 (A), 5.5 (B); spectral type: B9.5 pv (A), F0 V (B).

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Would you the star of Bacchus find, on noble Virgo's wing, A lengthy ray from Hydra's heart unto Arcturus bring; Two-thirds along that fancied line, direct th' inquiring eye, And there the jewel will be seen, south of Cor Caroli.

The Star-Clad Maiden: Visit Virgo to find these exemplary galaxies of spring

Apart from its brightest star Cor Caroli ([eth] CVn - mag.

A Tour of M51 spiral galaxy

It lies at RA 13h 15.8m and Dec +42[degrees] 02' (2000.0) which puts it just over 5[degrees] northeast of a CVn (Cor Caroli).

A 'sunflower' in Canes Venatici

Cor Caroli, the brightest star inside the crook formed by the Bear's tail and hind leg, is another superb, easy double star.

Spring: galaxies and double stars mark spring skies

You'll find the Coma Cluster about halfway between bright Beta (([beta]) Leonis (Denebola) and Alpha ([alpha]) Canum Venaticorum (Cor Caroli).

The pilgrim's way: Venus and Jupiter lead us on a journey through spring skies

Its saving grace is that its brightest star, magnitude 2.9 Cor Caroli, is a beautiful double star with a magnitude 5.5 companion, easily split in small telescopes and well displayed during April and May.

NGC 4244--a silver sliver in the spring sky

However, its principal star, 3rd-magnitude Alpha (a) Canum Venaticorum, or Cor Caroli, is a superb binary star.

May: catch little Mercury or ringed Saturn before bedtime and rise early for brilliant Venus and giant Jupiter at dawn. But if you want Mars, you're better off waiting awhile!

M3 has no even moderately bright stars nearby to use as guides--so look for it about halfway along the long line between Cor Caroli (Alpha Canum Venaticorum) and Arcturus.

The fabulous five: the globular clusters of summer are amazing to view

You'll find the galaxy halfway between 3rd-magnitude Cor Caroli, the brightest star in Canes Venatici, and 17 Comae Berenices--which was your starting point for NGC 4565.

June: as spring merges into summer four bright planets are arrayed across the sky at nightfall

The Alpha star, popularly known as Cor Caroli, is a beautiful double.

Pursuing mythic sky bears: the great and little bears are the stuff of history and legend

It's centered about halfway between Beta Leonis (Denebola) and Alpha Canum Venaticorum (Cor Caroli).

Cluster light, cluster bright: April evenings are ideal for viewing nearby star clusters

Cor Caroli ([alpha] Canum Venaticorum) is a striking unequal pair in even the smallest telescope.