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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
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All Constellations » Canes Venatici » 

Cor Caroli - α2 Canum Venaticorum (alpha2 Canum Venaticorum)

Altitude: 68.1°   Azimuth: 243.0°   Direction: West-South-West

Cor Caroli, also designated as α2 Canum Venaticorum (alpha2 Canum Venaticorum), is a variable and double hypergiant star in the constellation of Canes Venatici.

Cor Caroli visual magnitude is 2.9. Thanks to its high brightness, Cor Caroli is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The proper motion of Cor Caroli is -0.234 arcsec per year in Right Ascension and 0.056 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Cor Caroli - α2 Canum Venaticorum (alpha2 Canum Venaticorum) star
DSS2 image of Cor Caroli. The red arrow shows the motion of Cor Caroli during the next 1000 years (-3.90 arcmin in Right Ascension and 0.93 arcmin in declination);

Key facts about Cor Caroli


Cor Caroli - α2 Canum Venaticorum (alpha2 Canum Venaticorum) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 68.1°
Azimuth: 243.0°
Direction: West-South-West

Celestial coordinates and finder chart of Cor Caroli

Cor Caroli is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Cor Caroli are provided in the following table:

12h 56m 01s
+38° 19’ 05”
Canes Venatici

The simplified sky map below shows the position of Cor Caroli in the sky:

Finder chart Cor Caroli - α2 Canum Venaticorum (alpha2 Canum Venaticorum) star
Simplified finder chart for Cor Caroli - α2 Canum Venaticorum (alpha2 Canum Venaticorum).

Visibility of Cor Caroli from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Cor Caroli - α2 Canum Venaticorum (alpha2 Canum Venaticorum) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 51.7°
Max altitude: 76.8°
Azimuth: 308.3°

Distance of Cor Caroli from the Sun and relative movement

Cor Caroli is distant 110.14 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

33.78 pc
110.14 ly
-3 km/s
-0.234 arcsec/year
0.056 arcsec/year

Spectral properties of Cor Caroli

Cor Caroli belongs to spectral class A0 Cor Caroli is also a SiEuHg chemically peculiar star.


The red dot in the diagram below shows where Cor Caroli is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of Cor Caroli. Attribution: Richard Powell / CC BY-SA

Cor Caroli star system properties

Cor Caroli is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Cor Caroli double sysyem:

19.4 arcsec

Alternative designations of Cor Caroli

Cor Caroli
α2 Canum Venaticorum
(alpha2 Canum Venaticorum)
12 Canum Venaticorum