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
Your support helps us pay the server bills » Donate
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sunny DaytimeWhat's Visible Now?
All Constellations » Hercules » 

ξ Herculis (xi Herculis)

Altitude: 21.5°   Azimuth: 290.4°   Direction: West-North-West

ξ Herculis is a variable giant star in the constellation of Hercules.

ξ Herculis visual magnitude is 3.7. Because of its moderate brightness, ξ Herculis should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of ξ Herculis is 0.084 arcsec per year in Right Ascension and -0.017 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ξ Herculis (xi Herculis) star
DSS2 image of ξ Herculis. The red arrow shows the motion of ξ Herculis during the next 10000 years (14.00 arcmin in Right Ascension and -2.83 arcmin in declination);

Key facts about ξ Herculis


ξ Herculis (xi Herculis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 21.5°
Azimuth: 290.4°
Direction: West-North-West

Celestial coordinates and finder chart of ξ Herculis

ξ Herculis 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 ξ Herculis are provided in the following table:

17h 57m 45s
+29° 14’ 52”

The simplified sky map below shows the position of ξ Herculis in the sky:

Finder chart ξ Herculis (xi Herculis) star
Simplified finder chart for ξ Herculis (xi Herculis).

Visibility of ξ Herculis from your location

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

Today's ξ Herculis (xi Herculis) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.8°
Max altitude: 67.8°
Azimuth: 299.2°

Distance of ξ Herculis from the Sun and relative movement

ξ Herculis is distant 135.16 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

41.46 pc
135.16 ly
-2 km/s
0.084 arcsec/year
-0.017 arcsec/year

Spectral properties of ξ Herculis

ξ Herculis 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 ξ Herculis is situated in the Hertzsprung–Russell diagram.

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

Alternative designations of ξ Herculis

ξ Herculis
(xi Herculis)
92 Herculis