Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:44  
clear_day Transit: 12:57  
SunsetSet: 21:11 south
sunny DaytimeWhat's Visible Now
All Constellations » Coma Berenices » 

17 Comae Berenices

Altitude: 11.3°   Azimuth: 62.3°   Direction: East-North-East

17 Comae Berenices is a variable and multiple sub-giant star in the constellation of Coma Berenices.

17 Comae Berenices visual magnitude is 5.29. Because of its reltive faintness, 17 Comae Berenices 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 17 Comae Berenices:


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

Altitude: 11.3°
Azimuth: 62.3°
Direction: East-North-East

Celestial coordinates and finder chart of 17 Comae Berenices

17 Comae Berenices 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 17 Comae Berenices are provided in the following table:

12h 28m 54s
+25° 54’ 46”
Coma Berenices

The simplified sky map below shows the position of 17 Comae Berenices in the sky:

Finder chart 17 Comae Berenices star
Simplified finder chart for 17 Comae Berenices.

Visibility of 17 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 17 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: 64.1°
Max altitude: 64.4°
Azimuth: 295.9°
17 Comae Berenices is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 17 Comae Berenices

The image below is a photograph of 17 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 17 Comae Berenices is -0.025 arcsec per year in Right Ascension and -0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 17 Comae Berenices star
DSS2 image of 17 Comae Berenices. The red arrow shows the motion of 17 Comae Berenices during the next 10000 years (-4.17 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of 17 Comae Berenices from the Sun and relative movement

17 Comae Berenices is distant 270.32 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

82.92 pc
270.32 ly
-3 km/s
-0.025 arcsec/year
-0.02 arcsec/year

Spectral properties of 17 Comae Berenices

17 Comae Berenices belongs to spectral class A1 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 17 Comae Berenices is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 17 Comae Berenices. Attribution: Richard Powell / CC BY-SA

17 Comae Berenices star system properties

17 Comae Berenices is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 17 Comae Berenices double sysyem:

145.4 arcsec

Alternative designations of 17 Comae Berenices

17 Comae Berenices