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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 » 

31 Boötis

Altitude: 5.7°   Azimuth: 84.1°   Direction: East

31 Boötis is a variable giant star in the constellation of Boötes.

31 Boötis visual magnitude is 4.86. Because of its moderate brightness, 31 Boötis should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of 31 Boötis is -0.009 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 31 Boötis star
DSS2 image of 31 Boötis. The red arrow shows the motion of 31 Boötis during the next 100000 years (-15.00 arcmin in Right Ascension and 5.00 arcmin in declination);

Key facts about 31 Boötis


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

Altitude: 5.7°
Azimuth: 84.1°
Direction: East

Celestial coordinates and finder chart of 31 Boötis

31 Boötis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 31 Boötis are provided in the following table:

14h 41m 38s
+08° 09’ 42”

The simplified sky map below shows the position of 31 Boötis in the sky:

Finder chart 31 Boötis star
Simplified finder chart for 31 Boötis.

Visibility of 31 Boötis 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 31 Boötis 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: 81.8°
Max altitude: 46.7°
Azimuth: 278.2°

Distance of 31 Boötis from the Sun and relative movement

31 Boötis is distant 575.97 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

176.68 pc
575.97 ly
-22 km/s
-0.009 arcsec/year
0.003 arcsec/year

Spectral properties of 31 Boötis

31 Boötis belongs to spectral class G7 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 31 Boötis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 31 Boötis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 31 Boötis