We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sleep NighttimeWhat's Visible Now?
All Constellations » Hercules » 


Altitude: 6.9°   Azimuth: 343.8°   Direction: North-North-West

HR6791 is a giant star in the constellation of Hercules.

HR6791 visual magnitude is 5. Because of its moderate brightness, HR6791 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR6791:


HR6791 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 6.9°
Azimuth: 343.8°
Direction: North-North-West

Celestial coordinates and finder chart of HR6791

HR6791 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 HR6791 are provided in the following table:

18h 07m 28s
+43° 27’ 42”

The simplified sky map below shows the position of HR6791 in the sky:

Finder chart HR6791 star
Simplified finder chart for HR6791.

Visibility of HR6791 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR6791 is circumpolar and transits at 13:30 UTC (altitude: 82.0°)

Digitized Sky Survey image of HR6791

The image below is a photograph of HR6791 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR6791 is 0.002 arcsec per year in Right Ascension and -0.06 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6791 star
DSS2 image of HR6791. The red arrow shows the motion of HR6791 during the next 10000 years (0.33 arcmin in Right Ascension and -10.00 arcmin in declination);

Distance of HR6791 from the Sun and relative movement

HR6791 is distant 363.03 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

111.36 pc
363.03 ly
-16 km/s
0.002 arcsec/year
-0.06 arcsec/year

Spectral properties of HR6791

HR6791 belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR6791 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6791. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6791