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public LocationGreenwich, UK
Sunrise: 5:11 
Transit: 13:06 
Sunset: 21:00
sunny   (Daytime)   What's Visible Now?
All Constellations » Aquila » 

σ Aquilae (sigma Aquilae)

Below the horizon.  Rise: 18:10 | Tran: 0:35 | Set: 7:04
Alt: -10.21°   Az: 292.41°   Direction: West-North-West

σ Aquilae is a variable and multiple main-sequence star of spectral class B3 in the constellation of Aquila.

σ Aquilae visual magnitude is 5.17. Because of its faintness, σ 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.

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

Celestial Coordinates


19h 40m 24s
+05° 27’ 19”
07h 35m 45s
03h 16m 09s


19h 39m 11s
+05° 23’ 52”

Galactic Coordinates


Finder Chart

Finder chart σ Aquilae (sigma Aquilae) star
Simplified finder chart for σ Aquilae (sigma Aquilae).

Magnitude, Color, Spectral Class



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

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

Star System Properties

σ 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 σ Aquilae double sysyem:

47.8 arcsec

Distance, Radial Speed, Proper Motion

σ Aquilae is distant 682.01 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

-5 km/s
0.001 arcsec/y

Alternative Designations

σ Aquilae
(sigma Aquilae)

Visibility from Your Location

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

Azimuth: 84.5°
Max altitude: 44.0°
Azimuth: 275.5°