17 Comae Berenices

Above the horizon. Rise: 3:25 | Tran: 11:52 | Set: 20:18

Alt: 14.43° Az: 66.57° Direction: East-North-East

17 Comae Berenices is a variable and multiple sub-giant star of spectral class A1 in the constellation of Coma Berenices.

17 Comae Berenices visual magnitude is 5.29. Because of its faintness, 17 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 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);

Celestial Coordinates

Apparent

Right Ascension 12h 30m 08s

Declination +25° 46’ 33”

Hour Angle 17h 22m 38s

Sidereal Time 05h 52m 47s

J2000

Right Ascension 12h 28m 54s

Declination +25° 54’ 46”

Galactic Coordinates

Galactic Longitude 225.22°

Galactic Latitude 84.82°

Finder Chart

Simplified finder chart for 17 Comae Berenices.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.29

Class Sub-giant

Absolute magnitude 0.70

Spectral Type A1IV

Color Index (B-V) -0.05

Temperature 10795K

The red dot in the diagram below shows where 17 Comae Berenices is situated in the Hertzsprung–Russell diagram.

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

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:

Main star magnitude 5.29

Secondary star magnitude 6.69

Magnitude difference 1.4

Separation 145.4 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 82.92

Distance (light year) 270.32

Radial Speed -3 km/s

Proper Motion RA -0.025 arcsec/y

Proper Motion Dec -0.02"/y

Alternative Designations

Flamsteed designation 17 Comae Berenices

Henry Draper Catalogue HD108662

SAO Catalogue SAO82330

Hipparcos Catalogue HIP60904

Durchmusterung Catalogue BD+26 2354

General Catalogue of Variable Stars AI Com

Aitken Double Star Catalogue ADS8568

Visibility from Your Location

Today's 17 Comae Berenices rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 64.2° RISE 3:25

Max altitude: 64.3° TRANSIT 11:52

Azimuth: 295.8° SET 20:18

Set Location

Other stars in Coma Berenices