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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
sunny   (Daytime)   What's Visible Now?
All Constellations » Ursa Major » 

ζ Ursae Majoris (zeta Ursae Majoris)

Above the horizon.  Circumpolar today
Alt: 44.43°   Az: 52.72°   Direction: North-East

ζ Ursae Majoris is a variable and multiple star of spectral class A1 in the constellation of Ursa Major.

ζ Ursae Majoris visual magnitude is 3.95. Because of its moderate brightness, ζ 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 ζ Ursae Majoris (zeta Ursae Majoris) star
DSS2 image of ζ Ursae Majoris. The red arrow shows the motion of ζ Ursae Majoris during the next 1000 years (1.98 arcmin in Right Ascension and -0.47 arcmin in declination);

Celestial Coordinates

Apparent

13h 24m 55s
+54° 47’ 39”
18h 38m 58s
08h 03m 53s

J2000

13h 23m 56s
+54° 55’ 18”

Galactic Coordinates

113.11°
61.58°

Finder Chart

Finder chart ζ Ursae Majoris (zeta Ursae Majoris) star
Simplified finder chart for ζ Ursae Majoris (zeta Ursae Majoris).

Magnitude, Color, Spectral Class

3.95

2.04
A1
8748K

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

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

Star System Properties

ζ 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 ζ Ursae Majoris double sysyem:

3.95
5.65
1.7
0 arcsec

Distance, Radial Speed, Proper Motion

ζ Ursae Majoris is distant 78.74 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

24.15
78.74
-9 km/s
0.119 arcsec/y
-0.028"/y

Alternative Designations

ζ Ursae Majoris
(zeta Ursae Majoris)
79 Ursae Majoris
SAO28738
SAO28738
NN 3784 B

Visibility from Your Location

ζ Ursae Majoris (zeta Ursae Majoris) is circumpolar and transits at 17:32 UTC (altitude: 86.7°)