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public LocationGreenwich, UK
Sunrise: 4:57 
Transit: 13:04 
Sunset: 21:10
sunny   (Daytime)   What's Visible Now?
All Constellations » Hercules » 


Above the horizon.  Rise: 15:20 | Tran: 23:59 | Set: 8:43
Altitude: 45.9°   Azimuth: 103.6°   Direction: East-South-East

HR6904 is a multiple hypergiant star of spectral class A0 in the constellation of Hercules.

HR6904 visual magnitude is 6.27. Because of its faintness, HR6904 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.

HR6904 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere.

Image of HR6904 star
DSS2 image of HR6904. The red arrow shows the motion of HR6904 during the next 100000 years (3.33 arcmin in Right Ascension and 13.33 arcmin in declination);

Apparent Coordinates

18h 25m 57s
+27° 24’ 37”

J2000 Coordinates

18h 24m 58s
+27° 23’ 43”

Galactic Coordinates


Finder Chart

Finder chart HR6904 star
Simplified finder chart for HR6904.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where HR6904 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6904. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR6904 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR6904 double sysyem:

0.6 arcsec

Distance, Radial Speed, Proper Motion

HR6904 is distant 387.63 light years from the Sun and it is moving towards the Sun at the speed of 29 kilometers per second.

118.91 pc
387.63 ly
-29 km/s
0.002 arcsec/y
0.008 "/y

Alternative Designations


Visibility from Your Location

Today's HR6904 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 62.6°
Max altitude: 65.9°
Azimuth: 297.4°