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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: 5:51  
clear_day Transit: 12:57  
SunsetSet: 20:04
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All Constellations » Boötes » 

13 Boötis

Altitude: 29.8°   Azimuth: 46.6°   Direction: North-East

13 Boötis is a variable and double giant star in the constellation of Boötes.

13 Boötis visual magnitude is 5.25. Because of its reltive faintness, 13 Boötis should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of 13 Boötis is -0.061 arcsec per year in Right Ascension and 0.059 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 13 Boötis star
DSS2 image of 13 Boötis. The red arrow shows the motion of 13 Boötis during the next 10000 years (-10.17 arcmin in Right Ascension and 9.83 arcmin in declination);

Key facts about 13 Boötis


13 Boötis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 29.8°
Azimuth: 46.6°
Direction: North-East

Celestial coordinates and finder chart of 13 Boötis

13 Boötis 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 13 Boötis are provided in the following table:

14h 08m 17s
+49° 27’ 29”

The simplified sky map below shows the position of 13 Boötis in the sky:

Finder chart 13 Boötis star
Simplified finder chart for 13 Boötis.

Visibility of 13 Boötis from your location

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

13 Boötis is circumpolar and transits at 00:10 UTC (altitude: 88.0°)

Distance of 13 Boötis from the Sun and relative movement

13 Boötis is distant 556.31 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

170.65 pc
556.31 ly
-13 km/s
-0.061 arcsec/year
0.059 arcsec/year

Spectral properties of 13 Boötis

13 Boötis belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 13 Boötis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 13 Boötis. Attribution: Richard Powell / CC BY-SA

13 Boötis star system properties

13 Boötis is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 13 Boötis double sysyem:

79.7 arcsec

Alternative designations of 13 Boötis