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: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sunny DaytimeWhat's Visible Now?
All Constellations » Grus » 


Altitude: -39.7°   Azimuth: 123.2°   Direction: East-South-East

HR8791 is a giant star in the constellation of Grus.

HR8791 visual magnitude is 6.33. Because of its reltive faintness, HR8791 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR8791:


HR8791 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -39.7°
Azimuth: 123.2°
Direction: East-South-East

Celestial coordinates and finder chart of HR8791

HR8791 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8791 are provided in the following table:

23h 07m 09s
-49° 36’ 24”

The simplified sky map below shows the position of HR8791 in the sky:

Finder chart HR8791 star
Simplified finder chart for HR8791.

Visibility of HR8791 from your location

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

HR8791 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR8791

The image below is a photograph of HR8791 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 HR8791 is 0.017 arcsec per year in Right Ascension and -0.014 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8791 star
DSS2 image of HR8791. The red arrow shows the motion of HR8791 during the next 10000 years (2.83 arcmin in Right Ascension and -2.33 arcmin in declination);

Distance of HR8791 from the Sun and relative movement

HR8791 is distant 1,304.00 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

400.00 pc
1,304.00 ly
22 km/s
0.017 arcsec/year
-0.014 arcsec/year

Spectral properties of HR8791

HR8791 belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR8791 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8791. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8791