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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
SunriseRise: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
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All Constellations » Boötes » 

Nekkar - β Boötis (beta Boötis)

Altitude: 20.2°   Azimuth: 49.7°   Direction: North-East

Nekkar, also designated as β Boötis (beta Boötis), is a variable giant star in the constellation of Boötes.

Nekkar visual magnitude is 3.5. Because of its moderate brightness, Nekkar 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 proper motion of Nekkar is -0.041 arcsec per year in Right Ascension and -0.028 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Nekkar - β Boötis (beta Boötis) star
DSS2 image of Nekkar. The red arrow shows the motion of Nekkar during the next 10000 years (-6.83 arcmin in Right Ascension and -4.67 arcmin in declination);

Key facts about Nekkar


Nekkar - β Boötis (beta Boötis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 20.2°
Azimuth: 49.7°
Direction: North-East

Celestial coordinates and finder chart of Nekkar

Nekkar 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 Nekkar are provided in the following table:

15h 01m 56s
+40° 23’ 26”

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

Finder chart Nekkar - β Boötis (beta Boötis) star
Simplified finder chart for Nekkar - β Boötis (beta Boötis).

Visibility of Nekkar from your location

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

Nekkar - β Boötis (beta Boötis) is circumpolar and transits at 04:59 UTC (altitude: 78.9°)

Distance of Nekkar from the Sun and relative movement

Nekkar is distant 218.65 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

67.07 pc
218.65 ly
-20 km/s
-0.041 arcsec/year
-0.028 arcsec/year

Spectral properties of Nekkar

Nekkar belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of Nekkar

β Boötis
(beta Boötis)