γ Coronae Borealis (gamma Coronae Borealis)

Above the horizon. Rise: 8:48 | Tran: 17:19 | Set: 1:53

Alt: 52.41° Az: 117.97° Direction: East-South-East

γ Coronae Borealis is a variable and double sub-giant star of spectral class B9 in the constellation of Corona Borealis.

γ Coronae Borealis visual magnitude is 3.84. Because of its moderate brightness, γ Coronae Borealis 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.

Image of γ Coronae Borealis (gamma Coronae Borealis) star

DSS2 image of γ Coronae Borealis. The red arrow shows the motion of γ Coronae Borealis during the next 1000 years (-1.75 arcmin in Right Ascension and 0.75 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 43m 47s

Declination +26° 13’ 05”

Hour Angle 21h 32m 22s

Sideral Time 13h 16m 09s

J2000

Right Ascension 15h 42m 44s

Declination +26° 17’ 44”

Galactic Coordinates

Galactic Longitude 41.74°

Galactic Latitude 51.92°

Finder Chart

Simplified finder chart for γ Coronae Borealis (gamma Coronae Borealis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.84

Class Sub-giant

Absolute magnitude 0.60

Spectral Type B9IV

Color Index (B-V) 0

Temperature 10125K

The red dot in the diagram below shows where γ Coronae Borealis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of γ Coronae Borealis. Attribution: Richard Powell / CC BY-SA

Star System Properties

γ Coronae Borealis 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 γ Coronae Borealis double sysyem:

Main star magnitude 3.84

Secondary star magnitude 5.34

Magnitude difference 1.5

Separation 0.2 arcsec

Distance, Radial Speed, Proper Motion

γ Coronae Borealis is distant 145.02 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

Distance (parsec) 44.48

Distance (light year) 145.02

Radial Speed -11 km/s

Proper Motion RA -0.105 arcsec/y

Proper Motion Dec 0.045"/y

Alternative Designations

Bayer designation γ Coronae Borealis
(gamma Coronae Borealis)

Flamsteed designation 8 Coronae Borealis

Henry Draper Catalogue HD140436

SAO Catalogue SAO83958

Hipparcos Catalogue HIP76952

Durchmusterung Catalogue BD+26 2722

General Catalogue of Variable Stars Gam CrB

Aitken Double Star Catalogue ADS9757

Visibility from Your Location

Today's γ Coronae Borealis (gamma Coronae Borealis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 63.8° RISE 8:48

Max altitude: 64.7° TRANSIT 17:19

Azimuth: 296.2° SET 1:53

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

Location

Other stars in Corona Borealis