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: 7:50  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sleep NighttimeWhat's Visible Now?
All Constellations » Aquila » 

χ Aquilae (chi Aquilae)

Altitude: 23.0°   Azimuth: 259.8°   Direction: West

χ Aquilae is a variable and multiple hypergiant star in the constellation of Aquila.

χ Aquilae visual magnitude is 5.27. Because of its reltive faintness, χ Aquilae 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 χ Aquilae:


χ Aquilae (chi Aquilae) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 23.0°
Azimuth: 259.8°
Direction: West

Celestial coordinates and finder chart of χ Aquilae

χ Aquilae is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of χ Aquilae are provided in the following table:

19h 42m 33s
+11° 49’ 36”

The simplified sky map below shows the position of χ Aquilae in the sky:

Finder chart χ Aquilae (chi Aquilae) star
Simplified finder chart for χ Aquilae (chi Aquilae).

Visibility of χ Aquilae 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 χ Aquilae (chi Aquilae) 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: 78.2°
Max altitude: 50.3°
Azimuth: 281.8°

Digitized Sky Survey image of χ Aquilae

The image below is a photograph of χ Aquilae 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 χ Aquilae is -0.001 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of χ Aquilae (chi Aquilae) star
DSS2 image of χ Aquilae. The red arrow shows the motion of χ Aquilae during the next 100000 years (-1.67 arcmin in Right Ascension and -11.67 arcmin in declination);

Distance of χ Aquilae from the Sun and relative movement

χ Aquilae is distant 751.15 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

230.41 pc
751.15 ly
-22 km/s
-0.001 arcsec/year
-0.007 arcsec/year

Spectral properties of χ Aquilae

χ Aquilae belongs to spectral class G0 and has a luminosity class of III corresponding to a hypergiant star.


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

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

χ Aquilae star system properties

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

0.4 arcsec

Alternative designations of χ Aquilae

χ Aquilae
(chi Aquilae)