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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Corona Borealis » 

Nusakan - β Coronae Borealis (beta Coronae Borealis)

Altitude: 61.9°   Azimuth: 226.0°   Direction: South-West

Nusakan, also designated as β Coronae Borealis (beta Coronae Borealis), is a variable and double hypergiant star in the constellation of Corona Borealis.

Nusakan visual magnitude is 3.68. Because of its moderate brightness, Nusakan should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Nusakan:


Nusakan - β Coronae Borealis (beta Coronae Borealis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 61.9°
Azimuth: 226.0°
Direction: South-West

Celestial coordinates and finder chart of Nusakan

Nusakan is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Nusakan are provided in the following table:

15h 27m 49s
+29° 06’ 20”
Corona Borealis

The simplified sky map below shows the position of Nusakan in the sky:

Finder chart Nusakan - β Coronae Borealis (beta Coronae Borealis) star
Simplified finder chart for Nusakan - β Coronae Borealis (beta Coronae Borealis).

Visibility of Nusakan from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Nusakan - β Coronae Borealis (beta Coronae Borealis) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.9°
Max altitude: 67.6°
Azimuth: 299.1°

Digitized Sky Survey image of Nusakan

The image below is a photograph of Nusakan from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of Nusakan is -0.179 arcsec per year in Right Ascension and 0.086 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Nusakan - β Coronae Borealis (beta Coronae Borealis) star
DSS2 image of Nusakan. The red arrow shows the motion of Nusakan during the next 1000 years (-2.98 arcmin in Right Ascension and 1.43 arcmin in declination);

Distance of Nusakan from the Sun and relative movement

Nusakan is distant 113.99 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

34.97 pc
113.99 ly
-19 km/s
-0.179 arcsec/year
0.086 arcsec/year

Spectral properties of Nusakan

Nusakan belongs to spectral class F0


The red dot in the diagram below shows where Nusakan is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of Nusakan. Attribution: Richard Powell / CC BY-SA

Nusakan star system properties

Nusakan 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 Nusakan double sysyem:

0.3 arcsec

Alternative designations of Nusakan

β Coronae Borealis
(beta Coronae Borealis)
3 Coronae Borealis