ε Coronae Borealis (epsilon Coronae Borealis)

Below the horizon. Rise: 6:45 | Tran: 15:20 | Set: 23:54

Alt: -10.73° Az: 12.78° Direction: North-North-East

ε Coronae Borealis is a multiple giant star of spectral class K2 in the constellation of Corona Borealis.

ε Coronae Borealis visual magnitude is 4.15. Because of its moderate brightness, ε 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 ε Coronae Borealis (epsilon Coronae Borealis) star

DSS2 image of ε Coronae Borealis. The red arrow shows the motion of ε Coronae Borealis during the next 10000 years (-12.67 arcmin in Right Ascension and -10.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 58m 37s

Declination +26° 48’ 28”

Hour Angle 12h 56m 22s

Sidereal Time 04h 55m 00s

J2000

Right Ascension 15h 57m 35s

Declination +26° 52’ 40”

Galactic Coordinates

Galactic Longitude 43.65°

Galactic Latitude 48.78°

Finder Chart

Simplified finder chart for ε Coronae Borealis (epsilon Coronae Borealis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.15

Class Giant

Absolute magnitude -0.09

Spectral Type K2III

Color Index (B-V) 1.23

Temperature 4251K

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

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

Star System Properties

ε 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 ε Coronae Borealis double sysyem:

Main star magnitude 4.15

Secondary star magnitude 11.45

Magnitude difference 7.3

Separation 101.4 arcsec

Distance, Radial Speed, Proper Motion

ε Coronae Borealis is distant 229.58 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.

Distance (parsec) 70.42

Distance (light year) 229.58

Radial Speed -31 km/s

Proper Motion RA -0.076 arcsec/y

Proper Motion Dec -0.061"/y

Alternative Designations

Bayer designation ε Coronae Borealis
(epsilon Coronae Borealis)

Flamsteed designation 13 Coronae Borealis

Henry Draper Catalogue HD143107

SAO Catalogue SAO84098

Hipparcos Catalogue HIP78159

Durchmusterung Catalogue BD+27 2558

FK5 Catalogue 593

Aitken Double Star Catalogue ADS9859

Visibility from Your Location

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

Azimuth: 63.2° RISE 6:45

Max altitude: 65.3° TRANSIT 15:20

Azimuth: 296.8° SET 23:54

Set Location

Other stars in Corona Borealis