φ Ursae Majoris (phi Ursae Majoris)

Above the horizon. Circumpolar today

Alt: 51.14° Az: 300.65° Direction: West-North-West

φ Ursae Majoris is a double sub-giant star of spectral class A3 in the constellation of Ursa Major.

φ Ursae Majoris visual magnitude is 4.59. Because of its moderate brightness, φ Ursae Majoris 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 φ Ursae Majoris (phi Ursae Majoris) star

DSS2 image of φ Ursae Majoris. The red arrow shows the motion of φ Ursae Majoris during the next 10000 years (-0.67 arcmin in Right Ascension and 3.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 09h 53m 49s

Declination +53° 56’ 39”

Hour Angle 04h 26m 01s

Sidereal Time 14h 19m 50s

J2000

Right Ascension 09h 52m 06s

Declination +54° 03’ 51”

Galactic Coordinates

Galactic Longitude 160.87°

Galactic Latitude 47.7°

Finder Chart

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Finder chart for φ Ursae Majoris (phi Ursae Majoris).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.59

Class Sub-giant

Absolute magnitude -1.04

Spectral Type A3IV

Color Index (B-V) 0.03

Temperature 9766K

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

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

Star System Properties

φ Ursae Majoris 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 Ursae Majoris double sysyem:

Main star magnitude 4.59

Secondary star magnitude 4.79

Magnitude difference 0.2

Separation 0.3 arcsec

Distance, Radial Speed, Proper Motion

φ Ursae Majoris is distant 436.41 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 133.87

Distance (light year) 436.41

Radial Speed -12 km/s

Proper Motion RA -0.004 arcsec/y

Proper Motion Dec 0.021"/y

Alternative Designations

Bayer designation φ Ursae Majoris
(phi Ursae Majoris)

Flamsteed designation 30 Ursae Majoris

Henry Draper Catalogue HD85235

SAO Catalogue SAO27408

Hipparcos Catalogue HIP48402

Durchmusterung Catalogue BD+54 1331

Aitken Double Star Catalogue ADS7545

Visibility from Your Location

φ Ursae Majoris (phi Ursae Majoris) is circumpolar and transits at 18:11 UTC (altitude: 87.5°)

In Evidence

Other stars in Ursa Major

φ Ursae Majoris (phi Ursae Majoris)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location

Set Location

In Evidence

Other stars in Ursa Major

φ Ursae Majoris (phi Ursae Majoris)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location