We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
Help keep this site free and ads-free: donate now!
public LocationGreenwich, United Kingdom
TimezoneEurope/London
Sunrise: 4:42 
Transit: 12:58 
Sunset: 21:15
sunny   (Daytime)   What's Visible Now?

HR3911

Above the horizon.  Circumpolar today
Altitude: 45.3°   Azimuth: 43.2°   Direction: North-East

HR3911 is a double hypergiant star of spectral class K0 in the constellation of Ursa Major.

HR3911 visual magnitude is 6.27. Because of its faintness, HR3911 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.

Celestial coordinates and finder chart of HR3911

Finder chart HR3911 star
Simplified finder chart for HR3911.

HR3911 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3911 are provided in the following table:

09h 55m 03s
+61° 06’ 57”
151.35°
45.07°
Ursa Major
Image of HR3911 star
DSS2 image of HR3911. The red arrow shows the motion of HR3911 during the next 100000 years (15.00 arcmin in Right Ascension and -3.33 arcmin in declination);

Key facts about HR3911

6.27
Hypergiant

0.89
K0
4626K

The red dot in the diagram below shows where HR3911 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3911. Attribution: Richard Powell / CC BY-SA

HR3911 star system properties

HR3911 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 HR3911 double sysyem:

6.27
13.07
6.8
12.2 arcsec

Distance of HR3911 from the Sun and relative movement

HR3911 is distant 388.56 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

119.19 pc
388.56 ly
-11 km/s
0.009 arcsec/year
-0.002 arcsec/year

Alternative designations of HR3911

SAO15023
SAO15023

Visibility of HR3911 from your location

HR3911 is circumpolar and transits at 16:25 UTC (altitude: 80.4°)