12 Comae Berenices

Above the horizon. Rise: 5:02 | Tran: 13:28 | Set: 21:54

Alt: 9.52° Az: 60.29° Direction: East-North-East

12 Comae Berenices is a variable and multiple hypergiant star of spectral class G0 in the constellation of Coma Berenices.

12 Comae Berenices visual magnitude is 4.81. Because of its moderate brightness, 12 Comae Berenices is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of 12 Comae Berenices. The red arrow shows the motion of 12 Comae Berenices during the next 10000 years (-1.83 arcmin in Right Ascension and -1.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 12h 23m 44s

Declination +25° 42’ 33”

Hour Angle 16h 47m 43s

Sideral Time 05h 11m 28s

J2000

Right Ascension 12h 22m 30s

Declination +25° 50’ 45”

Galactic Coordinates

Galactic Longitude 222.5°

Galactic Latitude 83.4°

Finder Chart

Simplified finder chart for 12 Comae Berenices.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.81

Class Hypergiant

Absolute magnitude 0.19

Spectral Type G0III

Color Index (B-V) 0.49

Temperature 6435K

The red dot in the diagram below shows where 12 Comae Berenices is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 12 Comae Berenices. Attribution: Richard Powell / CC BY-SA

Star System Properties

12 Comae Berenices is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 12 Comae Berenices double sysyem:

Main star magnitude 4.81

Secondary star magnitude 8.51

Magnitude difference 3.7

Separation 65.3 arcsec

Distance, Radial Speed, Proper Motion

12 Comae Berenices is distant 273.26 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

Distance (parsec) 83.82

Distance (light year) 273.26

Radial Speed 1 km/s

Proper Motion RA -0.011 arcsec/y

Proper Motion Dec -0.009"/y

Alternative Designations

Flamsteed designation 12 Comae Berenices

Henry Draper Catalogue HD107700

SAO Catalogue SAO82273

Hipparcos Catalogue HIP60351

Durchmusterung Catalogue BD+26 2337

FK5 Catalogue 1318

General Catalogue of Variable Stars 5581

Aitken Double Star Catalogue ADS8530

Visibility from Your Location

Today's 12 Comae Berenices rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 64.3° RISE 5:02

Max altitude: 64.2° TRANSIT 13:28

Azimuth: 295.7° SET 21:54

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Coma Berenices