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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: 5:41  
clear_day Transit: 12:56  
SunsetSet: 20:12
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All Constellations » Coma Berenices » 

30 Comae Berenices

Altitude: 47.5°   Azimuth: 105.8°   Direction: East-South-East

30 Comae Berenices is a double main-sequence star in the constellation of Coma Berenices.

30 Comae Berenices visual magnitude is 5.78. Because of its reltive faintness, 30 Comae Berenices should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of 30 Comae Berenices is -0.096 arcsec per year in Right Ascension and 0.021 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 30 Comae Berenices star
DSS2 image of 30 Comae Berenices. The red arrow shows the motion of 30 Comae Berenices during the next 1000 years (-1.60 arcmin in Right Ascension and 0.35 arcmin in declination);

Key facts about 30 Comae Berenices

5.78
Main-sequence

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

Altitude: 47.5°
Azimuth: 105.8°
Direction: East-South-East

Celestial coordinates and finder chart of 30 Comae Berenices

30 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 30 Comae Berenices are provided in the following table:

12h 49m 17s
+27° 33’ 07”
171.1°
89.36°
Coma Berenices

The simplified sky map below shows the position of 30 Comae Berenices in the sky:

Finder chart 30 Comae Berenices star
Simplified finder chart for 30 Comae Berenices.

Visibility of 30 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 30 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: 62.4°
Max altitude: 66.1°
Azimuth: 297.6°

Distance of 30 Comae Berenices from the Sun and relative movement

30 Comae Berenices is distant 326.98 light years from the Sun

100.30 pc
326.98 ly
-0.096 arcsec/year
0.021 arcsec/year

Spectral properties of 30 Comae Berenices

30 Comae Berenices belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

0.77
A2V
9766K

The red dot in the diagram below shows where 30 Comae Berenices is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 30 Comae Berenices. Attribution: Richard Powell / CC BY-SA

30 Comae Berenices star system properties

30 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 30 Comae Berenices double sysyem:

5.78
12.78
7
42.5 arcsec

Alternative designations of 30 Comae Berenices

30 Comae Berenices
SAO82515
SAO82515