We use cookies to deliver essential features and to measure their performance. Learn more.
We're free & ads-free thanks to your support
public LocationGreenwich, UK
Sunrise: 5:00 
Transit: 13:04 
Sunset: 21:07
sunny   (Daytime)   What's Visible Now?
All Constellations » Ursa Major » 


Above the horizon.  Circumpolar today
Alt: 46.29°   Az: 45.94°   Direction: North-East

HR4008 is a variable hypergiant star of spectral class M0 in the constellation of Ursa Major.

HR4008 visual magnitude is 6.25. Because of its faintness, HR4008 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.

HR4008 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere.

Image of HR4008 star
DSS2 image of HR4008. The red arrow shows the motion of HR4008 during the next 10000 years (2.50 arcmin in Right Ascension and 1.50 arcmin in declination);

Celestial Coordinates


10h 16m 47s
+59° 51’ 46”
18h 33m 57s
04h 50m 45s


10h 15m 07s
+59° 59’ 08”

Galactic Coordinates


Finder Chart

Finder chart HR4008 star
Simplified finder chart for HR4008.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where HR4008 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4008. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR4008 is distant 1,743.32 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

534.76 pc
1,743.32 ly
-21 km/s
0.015 arcsec/y
0.009 "/y

Alternative Designations


Visibility from Your Location

HR4008 is circumpolar and transits at 14:41 UTC (altitude: 81.6°)