η Coronae Borealis (eta Coronae Borealis)

Above the horizon. Rise: 15:08 | Tran: 0:13 | Set: 9:21

Alt: 20.96° Az: 67.44° Direction: East-North-East

η Coronae Borealis is a variable and multiple main-sequence star of spectral class G3 in the constellation of Corona Borealis.

η Coronae Borealis visual magnitude is 6.08. Because of its faintness, η Coronae Borealis 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.

Image of η Coronae Borealis (eta Coronae Borealis) star

DSS2 image of η Coronae Borealis. The red arrow shows the motion of η Coronae Borealis during the next 1000 years (2.28 arcmin in Right Ascension and -3.12 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 24m 15s

Declination +30° 11’ 55”

Hour Angle 17h 44m 43s

Sidereal Time 09h 08m 58s

J2000

Right Ascension 15h 23m 12s

Declination +30° 17’ 16”

Galactic Coordinates

Galactic Longitude 47.54°

Galactic Latitude 56.73°

Finder Chart

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Finder chart for η Coronae Borealis (eta Coronae Borealis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.08

Class Main-sequence

Absolute magnitude 4.73

Spectral Type G3V

Color Index (B-V)

Temperature 10125K

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

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

Star System Properties

η 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 η Coronae Borealis double sysyem:

Main star magnitude 6.08

Secondary star magnitude 6.38

Magnitude difference 0.3

Separation 0.5 arcsec

Distance, Radial Speed, Proper Motion

η Coronae Borealis is distant 60.71 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

Distance (parsec) 18.62

Distance (light year) 60.71

Radial Speed -7 km/s

Proper Motion RA 0.137 arcsec/y

Proper Motion Dec -0.187"/y

Alternative Designations

Bayer designation η Coronae Borealis
(eta Coronae Borealis)

Flamsteed designation 2 Coronae Borealis

Henry Draper Catalogue HD137108

Durchmusterung Catalogue BD+30 2653

Gliese Catalogue Gl 584 B

General Catalogue of Variable Stars 7054

Aitken Double Star Catalogue ADS9617

Visibility from Your Location

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

Azimuth: 59.8° RISE 15:08

Max altitude: 68.7° TRANSIT 0:13

Azimuth: 300.2° SET 9:21

Set Location

Other stars in Corona Borealis