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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 » 

10 Boötis

Altitude: 25.1°   Azimuth: 86.2°   Direction: East

10 Boötis is a hypergiant star in the constellation of Boötes.

10 Boötis visual magnitude is 5.76. Because of its reltive faintness, 10 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 10 Boötis is -0.009 arcsec per year in Right Ascension and -0.045 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 10 Boötis star
DSS2 image of 10 Boötis. The red arrow shows the motion of 10 Boötis during the next 10000 years (-1.50 arcmin in Right Ascension and -7.50 arcmin in declination);

Key facts about 10 Boötis


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

Altitude: 25.1°
Azimuth: 86.2°
Direction: East

Celestial coordinates and finder chart of 10 Boötis

10 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 10 Boötis are provided in the following table:

13h 58m 38s
+21° 41’ 45”

The simplified sky map below shows the position of 10 Boötis in the sky:

Finder chart 10 Boötis star
Simplified finder chart for 10 Boötis.

Visibility of 10 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 10 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: 68.3°
Max altitude: 60.2°
Azimuth: 291.7°

Distance of 10 Boötis from the Sun and relative movement

10 Boötis is distant 480.12 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

147.28 pc
480.12 ly
6 km/s
-0.009 arcsec/year
-0.045 arcsec/year

Spectral properties of 10 Boötis

10 Boötis belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where 10 Boötis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 10 Boötis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 10 Boötis