21 Comae Berenices

Below the horizon. Rise: 4:21 | Tran: 12:37 | Set: 20:54

Alt: -10.06° Az: 333.82° Direction: North-North-West

21 Comae Berenices is a variable star of spectral class A2 in the constellation of Coma Berenices.

21 Comae Berenices visual magnitude is 5.46. Because of its faintness, 21 Comae Berenices is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 21 Comae Berenices. The red arrow shows the motion of 21 Comae Berenices during the next 10000 years (-2.00 arcmin in Right Ascension and -1.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 12h 32m 14s

Declination +24° 25’ 50”

Hour Angle 10h 05m 59s

Sideral Time 22h 38m 14s

J2000

Right Ascension 12h 31m 00s

Declination +24° 34’ 01”

Galactic Coordinates

Galactic Longitude 240.93°

Galactic Latitude 84.74°

Finder Chart

Simplified finder chart for 21 Comae Berenices.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.46

Class

Absolute magnitude 0.56

Spectral Type A2

Color Index (B-V) 0.05

Temperature 9542K

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

H-R diagram showing the position of 21 Comae Berenices. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

21 Comae Berenices is distant 310.77 light years from the Sun

Distance (parsec) 95.33

Distance (light year) 310.77

Proper Motion RA -0.012 arcsec/y

Proper Motion Dec -0.009"/y

Alternative Designations

Flamsteed designation 21 Comae Berenices

Henry Draper Catalogue HD108945

SAO Catalogue SAO82346

Hipparcos Catalogue HIP61071

Durchmusterung Catalogue BD+25 2517

General Catalogue of Variable Stars UU Com

Visibility from Your Location

Today's 21 Comae Berenices rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 65.6° RISE 4:21

Max altitude: 63.0° TRANSIT 12:37

Azimuth: 294.4° SET 20:54

Set Location

Other stars in Coma Berenices