Yellow-white main-sequence star · Canes Venatici

Cor Caroli B

Also known as: α¹ Canum Venaticorum (α¹ CVn), HIP 63121

mag 5.6120 light-years

About

Cor Caroli B (α¹ Canum Venaticorum) is a yellow-white main-sequence star of magnitude 5.6 in Canes Venatici, about 120 light-years away.

Cor Caroli B is in the constellation Canes Venatici.
Best evenings: around late May it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
Where on Earth: it is seen well, at least 10° up, from north of 42° S.

When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.

EyesNeeds a dark sky away from city lights.
Binoculars (10×50)A sharp point; binoculars bring out its colour and the fainter stars around it.
Telescope (6–8 inch)Still a point of light at any magnification — stars are too far away to show a disc. Low in the sky, bright stars twinkle and flash colours.

Stars look the same in any instrument: brighter and sharper, but never bigger.

Proper name	Cor Caroli B
Designation	α¹ Canum Venaticorum (α¹ CVn)
Hipparcos number	HIP 63121
Type	Yellow-white main-sequence star
Spectral type	F0V
Colour	Yellowish whiteB−V colour index 0.34
Magnitude	5.6The smaller the number, the brighter.
Distance	120 light-yearsThe light you see left it around 1910.
Proper motion	0.22″ per year across the sky
Constellation	Canes Venatici
Right ascension (J2000)	12h 56m 00.5s
Declination (J2000)	+38° 18′ 54″