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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
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All Constellations » Ursa Major » 

15 Ursae Majoris

Altitude: 78.7°   Azimuth: 277.8°   Direction: West

15 Ursae Majoris is a hypergiant star in the constellation of Ursa Major.

15 Ursae Majoris visual magnitude is 4.48. Because of its moderate brightness, 15 Ursae Majoris should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of 15 Ursae Majoris is -0.137 arcsec per year in Right Ascension and -0.03 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 15 Ursae Majoris star
DSS2 image of 15 Ursae Majoris. The red arrow shows the motion of 15 Ursae Majoris during the next 1000 years (-2.28 arcmin in Right Ascension and -0.50 arcmin in declination);

Key facts about 15 Ursae Majoris


15 Ursae Majoris is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 78.7°
Azimuth: 277.8°
Direction: West

Celestial coordinates and finder chart of 15 Ursae Majoris

15 Ursae Majoris is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 15 Ursae Majoris are provided in the following table:

09h 08m 52s
+51° 36’ 16”
Ursa Major

The simplified sky map below shows the position of 15 Ursae Majoris in the sky:

Finder chart 15 Ursae Majoris star
Simplified finder chart for 15 Ursae Majoris.

Visibility of 15 Ursae Majoris from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

15 Ursae Majoris is circumpolar and transits at 22:35 UTC (altitude: 89.9°)

Distance of 15 Ursae Majoris from the Sun and relative movement

15 Ursae Majoris is distant 95.55 light years from the Sun

29.31 pc
95.55 ly
-0.137 arcsec/year
-0.03 arcsec/year

Spectral properties of 15 Ursae Majoris

15 Ursae Majoris belongs to spectral class F0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where 15 Ursae Majoris is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 15 Ursae Majoris. Attribution: Richard Powell / CC BY-SA

Alternative designations of 15 Ursae Majoris

15 Ursae Majoris