φ Draconis (phi Draconis)

Above the horizon. Circumpolar today

Alt: 40.77° Az: 337.76° Direction: North-North-West

φ Draconis is a variable and multiple hypergiant star of spectral class A0 in the constellation of Draco.

φ Draconis visual magnitude is 4.22. Because of its moderate brightness, φ Draconis 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 φ Draconis. The red arrow shows the motion of φ Draconis during the next 10000 years (-0.67 arcmin in Right Ascension and 6.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 20m 23s

Declination +71° 21’ 01”

Hour Angle 07h 45m 18s

Sidereal Time 02h 05m 42s

J2000

Right Ascension 18h 20m 45s

Declination +71° 20’ 16”

Galactic Coordinates

Galactic Longitude 101.88°

Galactic Latitude 28.04°

Finder Chart

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Finder chart for φ Draconis (phi Draconis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.22

Class Hypergiant

φ Draconis is also a Si chemically peculiar star.

Absolute magnitude -0.52

Spectral Type A0

Color Index (B-V) -0.1

Temperature 11573K

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

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

Star System Properties

φ Draconis 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 φ Draconis double sysyem:

Main star magnitude 4.22

Secondary star magnitude 5.92

Magnitude difference 1.7

Separation 0.2 arcsec

Distance, Radial Speed, Proper Motion

φ Draconis is distant 289.01 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

Distance (parsec) 88.65

Distance (light year) 289.01

Radial Speed -16 km/s

Proper Motion RA -0.004 arcsec/y

Proper Motion Dec 0.04"/y

Alternative Designations

Bayer designation φ Draconis
(phi Draconis)

Flamsteed designation 43 Draconis

Henry Draper Catalogue HD170000

SAO Catalogue SAO9084

Hipparcos Catalogue HIP89908

Durchmusterung Catalogue BD+71 889

General Catalogue of Variable Stars Phi Dra

Aitken Double Star Catalogue ADS11311

Visibility from Your Location

φ Draconis (phi Draconis) is circumpolar and transits at 02:12 UTC (altitude: 70.1°)

Set Location

Other stars in Draco