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public LocationGreenwich, UK
Sunrise: 4:58 
Transit: 13:04 
Sunset: 21:09
sunny   (Daytime)   What's Visible Now?
All Constellations » Hercules » 


Above the horizon.  Rise: 13:55 | Tran: 23:11 | Set: 8:31
Altitude: 50.8°   Azimuth: 102.8°   Direction: East-South-East

HR6591 is a double hypergiant star of spectral class K0 in the constellation of Hercules.

HR6591 visual magnitude is 6.28. Because of its faintness, HR6591 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.

HR6591 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere.

Image of HR6591 star
DSS2 image of HR6591. The red arrow shows the motion of HR6591 during the next 10000 years (-11.17 arcmin in Right Ascension and -12.17 arcmin in declination);

Apparent Coordinates

17h 41m 36s
+31° 16’ 34”
20h 54m 34s

J2000 Coordinates

17h 40m 41s
+31° 17’ 15”

Galactic Coordinates


Finder Chart

Finder chart HR6591 star
Simplified finder chart for HR6591.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where HR6591 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6591. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR6591 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR6591 double sysyem:

115 arcsec

Distance, Radial Speed, Proper Motion

HR6591 is distant 402.97 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

123.61 pc
402.97 ly
-6 km/s
-0.067 arcsec/y
-0.073 "/y

Alternative Designations


Visibility from Your Location

Today's HR6591 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 58.7°
Max altitude: 69.8°
Azimuth: 301.3°