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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:04  
clear_day Transit: 12:47  
SunsetSet: 18:30 south
sunny DaytimeWhat's Visible Now
All Constellations » Coma Berenices » 

23 Comae Berenices

Altitude: 54.8°   Azimuth: 224.9°   Direction: South-West

23 Comae Berenices is a double hypergiant star in the constellation of Coma Berenices.

23 Comae Berenices visual magnitude is 4.81. Because of its moderate brightness, 23 Comae Berenices should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 23 Comae Berenices:


23 Comae Berenices is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 54.8°
Azimuth: 224.9°
Direction: South-West

Celestial coordinates and finder chart of 23 Comae Berenices

23 Comae Berenices is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 23 Comae Berenices are provided in the following table:

12h 34m 51s
+22° 37’ 45”
Coma Berenices

The simplified sky map below shows the position of 23 Comae Berenices in the sky:

Finder chart 23 Comae Berenices star
Simplified finder chart for 23 Comae Berenices.

Visibility of 23 Comae Berenices 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 23 Comae Berenices 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: 67.4°
Max altitude: 61.1°
Azimuth: 292.6°

Digitized Sky Survey image of 23 Comae Berenices

The image below is a photograph of 23 Comae Berenices 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 23 Comae Berenices is -0.065 arcsec per year in Right Ascension and 0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 23 Comae Berenices star
DSS2 image of 23 Comae Berenices. The red arrow shows the motion of 23 Comae Berenices during the next 10000 years (-10.83 arcmin in Right Ascension and 3.50 arcmin in declination);

Distance of 23 Comae Berenices from the Sun and relative movement

23 Comae Berenices is distant 364.65 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

111.86 pc
364.65 ly
-16 km/s
-0.065 arcsec/year
0.021 arcsec/year

Spectral properties of 23 Comae Berenices

23 Comae Berenices belongs to spectral class A0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where 23 Comae Berenices is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 23 Comae Berenices. Attribution: Richard Powell / CC BY-SA

23 Comae Berenices star system properties

23 Comae Berenices is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 23 Comae Berenices double sysyem:

0.4 arcsec

Alternative designations of 23 Comae Berenices

23 Comae Berenices