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public LocationGreenwich, UK
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:18
sunny   (Daytime)   What's Visible Now?


Above the horizon.  Rise: 9:20 | Tran: 18:57 | Set: 4:39
Altitude: 71.6°   Azimuth: 173.6°   Direction: South

HR4581 is a double giant star of spectral class K1 in the constellation of Ursa Major.

HR4581 visual magnitude is 5.96. Because of its faintness, HR4581 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 HR4581

Finder chart HR4581 star
Simplified finder chart for HR4581.

HR4581 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 HR4581 are provided in the following table:

11h 59m 17s
+33° 10’ 02”
Ursa Major
Image of HR4581 star
DSS2 image of HR4581. The red arrow shows the motion of HR4581 during the next 100000 years (6.67 arcmin in Right Ascension and 5.00 arcmin in declination);

Key facts about HR4581


and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4581 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4581. Attribution: Richard Powell / CC BY-SA

HR4581 star system properties

HR4581 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 HR4581 double sysyem:

4.5 arcsec

Distance of HR4581 from the Sun and relative movement

HR4581 is distant 670.78 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

205.76 pc
670.78 ly
-1 km/s
0.004 arcsec/year
0.003 arcsec/year

Alternative designations of HR4581


Visibility of HR4581 from your location

Today's HR4581 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.8°
Max altitude: 71.7°
Azimuth: 303.2°