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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:13 
Transit: 12:56 
Sunset: 20:39
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All Constellations » Aquila » 

21 Aquilae

Above the horizon.  Rise: 22:40 | Tran: 4:54 | Set: 11:04
Alt: 39.58°   Az: 197.54°   Direction: South-South-West

21 Aquilae is a variable and double bright giant star of spectral class B8 in the constellation of Aquila.

21 Aquilae visual magnitude is 5.15. Because of its faintness, 21 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 21 Aquilae star
DSS2 image of 21 Aquilae. The red arrow shows the motion of 21 Aquilae during the next 100000 years (15.00 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates

Apparent

19h 14m 59s
+02° 20’ 19”
00h 53m 45s
20h 08m 44s

J2000

19h 13m 42s
+02° 17’ 36”

Galactic Coordinates

37.52°
-3.9°

Finder Chart

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Finder chart for 21 Aquilae.

Magnitude, Color, Spectral Class

5.15
Bright giant

-1.32
B8II
11092K

The red dot in the diagram below shows where 21 Aquilae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 21 Aquilae. Attribution: Richard Powell / CC BY-SA

Star System Properties

21 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 21 Aquilae double sysyem:

5.15
12.65
7.5
36.2 arcsec

Distance, Radial Speed, Proper Motion

21 Aquilae is distant 640.47 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

196.46
640.47
-5 km/s
0.009 arcsec/y
-0.003"/y

Alternative Designations

SAO124408
SAO124408

Visibility from Your Location

Today's 21 Aquilae rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 87.7°
Max altitude: 40.9°
Azimuth: 272.3°