We use cookies to deliver essential features and to measure their performance. Learn more.
We're free & ads-free thanks to your support
public LocationGreenwich, UK
Sunrise: 5:01 
Transit: 13:04 
Sunset: 21:06
sunny   (Daytime)   What's Visible Now?
All Constellations » Aquila » 

4 Aquilae

Below the horizon.  Rise: 17:56 | Tran: 0:04 | Set: 6:17
Alt: -30.84°   Az: 324.89°   Direction: North-West

4 Aquilae is a variable main-sequence star of spectral class B9 in the constellation of Aquila.

4 Aquilae visual magnitude is 5.02. Because of its faintness, 4 Aquilae 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.

4 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.

Image of 4 Aquilae star
DSS2 image of 4 Aquilae. The red arrow shows the motion of 4 Aquilae during the next 10000 years (1.50 arcmin in Right Ascension and -3.00 arcmin in declination);

Celestial Coordinates


18h 46m 04s
+02° 05’ 12”
10h 01m 31s
04h 47m 36s


18h 44m 49s
+02° 03’ 36”

Galactic Coordinates


Finder Chart

Finder chart 4 Aquilae star
Simplified finder chart for 4 Aquilae.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where 4 Aquilae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 4 Aquilae. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

4 Aquilae is distant 471.78 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

144.72 pc
471.78 ly
-13 km/s
0.009 arcsec/y
-0.018 "/y

Alternative Designations


Visibility from Your Location

Today's 4 Aquilae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 87.9°
Max altitude: 40.6°
Azimuth: 272.1°