δ Boötis (delta Boötis)

Below the horizon. Rise: 15:06 | Tran: 0:44 | Set: 10:26

Alt: -0.77° Az: 26.27° Direction: North-North-East

δ Boötis is a variable and double giant star of spectral class G8 in the constellation of Boötes.

δ Boötis visual magnitude is 3.47. Because of its moderate brightness, δ Boötis is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

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);

Celestial Coordinates

Apparent

Right Ascension 15h 16m 31s

Declination +33° 13’ 19”

Hour Angle 14h 07m 46s

Sidereal Time 05h 24m 17s

J2000

Right Ascension 15h 15m 30s

Declination +33° 18’ 52”

Galactic Coordinates

Galactic Longitude 53.12°

Galactic Latitude 58.43°

Finder Chart

Loading map...

Finder chart for δ Boötis (delta Boötis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.47

Class Giant

Absolute magnitude 0.70

Spectral Type G8III

Color Index (B-V) 0.95

Temperature 4866K

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

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

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:

Main star magnitude 3.47

Secondary star magnitude 7.87

Magnitude difference 4.4

Separation 104.9 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 35.79

Distance (light year) 116.68

Radial Speed -12 km/s

Proper Motion RA 0.086 arcsec/y

Proper Motion Dec -0.112"/y

Alternative Designations

Bayer designation δ Boötis
(delta Boötis)

Flamsteed designation 49 Boötis

Henry Draper Catalogue HD135722

SAO Catalogue SAO64589

Hipparcos Catalogue HIP74666

Durchmusterung Catalogue BD+33 2561

FK5 Catalogue 563

General Catalogue of Variable Stars 7002

Aitken Double Star Catalogue ADS9559

Visibility from Your Location

Today's δ Boötis (delta Boötis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.8° RISE 15:06

Max altitude: 71.7° TRANSIT 0:44

Azimuth: 303.2° SET 10:26

Set Location

Other stars in Boötes