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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:30 
Transit: 12:14 
Sunset: 16:58
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All Constellations » Ursa Major » 

81 Ursae Majoris

Above the horizon.  Circumpolar today
Alt: 47.91°   Az: 54.78°   Direction: North-East

81 Ursae Majoris is a variable hypergiant star of spectral class A0 in the constellation of Ursa Major.

81 Ursae Majoris visual magnitude is 5.6. Because of its faintness, 81 Ursae Majoris is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of 81 Ursae Majoris star
DSS2 image of 81 Ursae Majoris. The red arrow shows the motion of 81 Ursae Majoris during the next 10000 years (-3.67 arcmin in Right Ascension and -0.33 arcmin in declination);

Celestial Coordinates

Apparent

13h 35m 05s
+55° 13’ 14”
19h 05m 01s
08h 40m 06s

J2000

13h 34m 07s
+55° 20’ 54”

Galactic Coordinates

110.49°
60.74°

Finder Chart

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Finder chart for 81 Ursae Majoris.

Magnitude, Color, Spectral Class

5.6
Hypergiant

0.95
A0V
10516K

The red dot in the diagram below shows where 81 Ursae Majoris is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 81 Ursae Majoris. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

81 Ursae Majoris is distant 276.98 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

84.96
276.98
-7 km/s
-0.022 arcsec/y
-0.002"/y

Alternative Designations

81 Ursae Majoris
SAO28803
SAO28803

Visibility from Your Location

81 Ursae Majoris is circumpolar and transits at 04:28 UTC (altitude: 86.3°)