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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: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
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All Constellations » Boötes » 

δ Boötis (delta Boötis)

Altitude: 7.4°   Azimuth: 43.5°   Direction: North-East

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

δ Boötis visual magnitude is 3.47. Because of its moderate brightness, δ Boötis should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The proper motion of δ Boötis is 0.086 arcsec per year in Right Ascension and -0.112 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of δ Boötis (delta Boötis) star
DSS2 image of δ Boötis. The red arrow shows the motion of δ Boötis during the next 1000 years (1.43 arcmin in Right Ascension and -1.87 arcmin in declination);

Key facts about δ Boötis

3.47
Giant

δ Boötis (delta Boötis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 7.4°
Azimuth: 43.5°
Direction: North-East

Celestial coordinates and finder chart of δ Boötis

δ 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 δ Boötis are provided in the following table:

15h 15m 30s
+33° 18’ 52”
53.12°
58.43°
Boötes

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

Finder chart δ Boötis (delta Boötis) star
Simplified finder chart for δ Boötis (delta Boötis).

Visibility of δ 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 δ Boötis (delta 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: 56.7°
Max altitude: 71.8°
Azimuth: 303.3°

Distance of δ Boötis from the Sun and relative movement

δ Boötis is distant 116.68 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

35.79 pc
116.68 ly
-12 km/s
0.086 arcsec/year
-0.112 arcsec/year

Spectral properties of δ Boötis

δ Boötis belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

0.70
G8III
4866K

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

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

δ Boötis star system properties

δ 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 δ Boötis double sysyem:

3.47
7.87
4.4
104.9 arcsec

Alternative designations of δ Boötis

δ Boötis
(delta Boötis)
SAO64589
SAO64589