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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
north SunriseRise: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Ursa Major » 

39 Ursae Majoris

Altitude: 18.7°   Azimuth: 1.7°   Direction: North

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

39 Ursae Majoris visual magnitude is 5.8. Because of its reltive faintness, 39 Ursae Majoris should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 39 Ursae Majoris:


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

Altitude: 18.7°
Azimuth: 1.7°
Direction: North

Celestial coordinates and finder chart of 39 Ursae Majoris

39 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 39 Ursae Majoris are provided in the following table:

10h 43m 43s
+57° 11’ 57”
Ursa Major

The simplified sky map below shows the position of 39 Ursae Majoris in the sky:

Finder chart 39 Ursae Majoris star
Simplified finder chart for 39 Ursae Majoris.

Visibility of 39 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

39 Ursae Majoris is circumpolar and transits at 05:40 UTC (altitude: 84.3°)

Digitized Sky Survey image of 39 Ursae Majoris

The image below is a photograph of 39 Ursae Majoris from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 39 Ursae Majoris is 0.017 arcsec per year in Right Ascension and -0.053 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 39 Ursae Majoris star
DSS2 image of 39 Ursae Majoris. The red arrow shows the motion of 39 Ursae Majoris during the next 10000 years (2.83 arcmin in Right Ascension and -8.83 arcmin in declination);

Distance of 39 Ursae Majoris from the Sun and relative movement

39 Ursae Majoris is distant 367.53 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

112.74 pc
367.53 ly
-15 km/s
0.017 arcsec/year
-0.053 arcsec/year

Spectral properties of 39 Ursae Majoris

39 Ursae Majoris belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where 39 Ursae Majoris is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 39 Ursae Majoris. Attribution: Richard Powell / CC BY-SA

Alternative designations of 39 Ursae Majoris

39 Ursae Majoris