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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 » 

39 Boötis

Altitude: 23.3°   Azimuth: 39.3°   Direction: North-East

39 Boötis is a double main-sequence star in the constellation of Boötes.

39 Boötis visual magnitude is 5.69. Because of its reltive faintness, 39 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 39 Boötis is -0.076 arcsec per year in Right Ascension and 0.096 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 39 Boötis star
DSS2 image of 39 Boötis. The red arrow shows the motion of 39 Boötis during the next 1000 years (-1.27 arcmin in Right Ascension and 1.60 arcmin in declination);

Key facts about 39 Boötis


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

Altitude: 23.3°
Azimuth: 39.3°
Direction: North-East

Celestial coordinates and finder chart of 39 Boötis

39 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 39 Boötis are provided in the following table:

14h 49m 41s
+48° 43’ 14”

The simplified sky map below shows the position of 39 Boötis in the sky:

Finder chart 39 Boötis star
Simplified finder chart for 39 Boötis.

Visibility of 39 Boötis from your location

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

39 Boötis is circumpolar and transits at 00:51 UTC (altitude: 87.2°)

Distance of 39 Boötis from the Sun and relative movement

39 Boötis is distant 229.25 light years from the Sun and it is moving towards the Sun at the speed of 32 kilometers per second.

70.32 pc
229.25 ly
-32 km/s
-0.076 arcsec/year
0.096 arcsec/year

Spectral properties of 39 Boötis

39 Boötis belongs to spectral class F6 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 39 Boötis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 39 Boötis. Attribution: Richard Powell / CC BY-SA

39 Boötis star system properties

39 Boötis is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the 39 Boötis double sysyem:

2.9 arcsec

Alternative designations of 39 Boötis