Altais - δ Draconis (delta Draconis)

Above the horizon. Circumpolar today

Alt: 29.37° Az: 3.88° Direction: North

Altais, also designated as δ Draconis (delta Draconis), is a double giant star of spectral class G9 in the constellation of Draco.

Altais visual magnitude is 3.07. Because of its moderate brightness, Altais 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.

Image of Altais - δ Draconis (delta Draconis) star

DSS2 image of Altais. The red arrow shows the motion of Altais during the next 1000 years (1.57 arcmin in Right Ascension and 1.55 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 19h 12m 32s

Declination +67° 42’ 20”

Hour Angle 12h 35m 47s

Sidereal Time 07h 48m 20s

J2000

Right Ascension 19h 12m 33s

Declination +67° 39’ 42”

Galactic Coordinates

Galactic Longitude 98.65°

Galactic Latitude 23°

Finder Chart

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Finder chart for Altais - δ Draconis (delta Draconis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.07

Class Giant

Absolute magnitude 0.63

Spectral Type G9III

Color Index (B-V) 1

Temperature 4743K

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

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

Star System Properties

Altais 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 Altais double sysyem:

Main star magnitude 3.07

Secondary star magnitude 12.27

Magnitude difference 9.2

Separation 88.1 arcsec

Distance, Radial Speed, Proper Motion

Altais is distant 100.18 light years from the Sun and it is moving far from the Sun at the speed of 25 kilometers per second.

Distance (parsec) 30.73

Distance (light year) 100.18

Radial Speed 25 km/s

Proper Motion RA 0.094 arcsec/y

Proper Motion Dec 0.093"/y

Alternative Designations

Proper Name Altais

Bayer designation δ Draconis
(delta Draconis)

Flamsteed designation 57 Draconis

Henry Draper Catalogue HD180711

SAO Catalogue SAO18222

Hipparcos Catalogue HIP94376

Durchmusterung Catalogue BD+67 1129

FK5 Catalogue 723

Visibility from Your Location

Altais - δ Draconis (delta Draconis) is circumpolar and transits at 03:16 UTC (altitude: 73.8°)

Set Location

Other stars in Draco