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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
sunny DaytimeWhat's Visible Now?
All Constellations » Boötes » 

47 Boötis

Altitude: 26.9°   Azimuth: 45.3°   Direction: North-East

47 Boötis is a variable and double main-sequence star in the constellation of Boötes.

47 Boötis visual magnitude is 5.57. Because of its reltive faintness, 47 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 47 Boötis is -0.066 arcsec per year in Right Ascension and 0.031 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 47 Boötis star
DSS2 image of 47 Boötis. The red arrow shows the motion of 47 Boötis during the next 10000 years (-11.00 arcmin in Right Ascension and 5.17 arcmin in declination);

Key facts about 47 Boötis


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

Altitude: 26.9°
Azimuth: 45.3°
Direction: North-East

Celestial coordinates and finder chart of 47 Boötis

47 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 47 Boötis are provided in the following table:

15h 05m 25s
+48° 09’ 03”

The simplified sky map below shows the position of 47 Boötis in the sky:

Finder chart 47 Boötis star
Simplified finder chart for 47 Boötis.

Visibility of 47 Boötis from your location

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

47 Boötis is circumpolar and transits at 01:07 UTC (altitude: 86.7°)

Distance of 47 Boötis from the Sun and relative movement

47 Boötis is distant 259.76 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

79.68 pc
259.76 ly
-13 km/s
-0.066 arcsec/year
0.031 arcsec/year

Spectral properties of 47 Boötis

47 Boötis belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 47 Boötis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 47 Boötis. Attribution: Richard Powell / CC BY-SA

47 Boötis star system properties

47 Boötis is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 47 Boötis double sysyem:

6.2 arcsec

Alternative designations of 47 Boötis