HR3911

Above the horizon. Circumpolar today

Alt: 65.18° Az: 51.01° 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.

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);

Celestial Coordinates

Apparent

Right Ascension 09h 56m 50s

Declination +60° 59’ 52”

Hour Angle 21h 10m 46s

Sideral Time 07h 07m 37s

J2000

Right Ascension 09h 55m 03s

Declination +61° 06’ 57”

Galactic Coordinates

Galactic Longitude 151.35°

Galactic Latitude 45.07°

Finder Chart

Simplified finder chart for HR3911.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.27

Class Hypergiant

Absolute magnitude 0.89

Spectral Type K0

Color Index (B-V) 1.05

Temperature 4626K

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

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

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:

Main star magnitude 6.27

Secondary star magnitude 13.07

Magnitude difference 6.8

Separation 12.2 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 119.19

Distance (light year) 388.56

Radial Speed -11 km/s

Proper Motion RA 0.009 arcsec/y

Proper Motion Dec -0.002"/y

Alternative Designations

Henry Draper Catalogue HD85583

SAO Catalogue SAO15023

Hipparcos Catalogue HIP48638

Durchmusterung Catalogue BD+61 1151

FK5 Catalogue 2790

Visibility from Your Location

HR3911 is circumpolar and transits at 08:35 UTC (altitude: 80.5°)

Set Location

Other stars in Ursa Major