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🌎  Greenwich, United Kingdom [change]

21 Canum Venaticorum

21 Canum Venaticorum is a variable hypergiant star in the constellation of Canes Venatici.

21 Canum Venaticorum visual magnitude is 5.15. Because of its reltive faintness, 21 Canum Venaticorum should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 21 Canum Venaticorum:

5.15
Hypergiant
21 Canum Venaticorum is above the horizon from Greenwich, United Kingdom [change]. Altitude: 64°.

Celestial coordinates and finder chart of 21 Canum Venaticorum

21 Canum Venaticorum 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 21 Canum Venaticorum are provided in the following table:

13h 18m 14s
+49° 40’ 54”
111.85°
66.87°
Canes Venatici

The simplified sky map below shows the position of 21 Canum Venaticorum in the sky:

Finder chart 21 Canum Venaticorum star
Simplified finder chart for 21 Canum Venaticorum.

Visibility of 21 Canum Venaticorum from your location

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

21 Canum Venaticorum is circumpolar and transits at 08:40 UTC (altitude: 88.2°)

Digitized Sky Survey image of 21 Canum Venaticorum

The image below is a photograph of 21 Canum Venaticorum from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 21 Canum Venaticorum is -0.033 arcsec per year in Right Ascension and 0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 21 Canum Venaticorum star
DSS2 image of 21 Canum Venaticorum. The red arrow shows the motion of 21 Canum Venaticorum during the next 10000 years (-5.50 arcmin in Right Ascension and 2.50 arcmin in declination);

Distance of 21 Canum Venaticorum from the Sun and relative movement

21 Canum Venaticorum is distant 275.11 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

84.39 pc
275.11 ly
-3 km/s
-0.033 arcsec/year
0.015 arcsec/year

Spectral properties of 21 Canum Venaticorum

21 Canum Venaticorum belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

0.52
A0V
11092K

The red dot in the diagram below shows where 21 Canum Venaticorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 21 Canum Venaticorum. Attribution: Richard Powell / CC BY-SA

Alternative designations of 21 Canum Venaticorum

21 Canum Venaticorum
SAO44556
SAO44556