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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 12:59 
Sunset: 21:16
wb_twilight   (Astronomical Twilight)   What's Visible Now?

51 Aquilae

Above the horizon.  Rise: 22:04 | Tran: 3:11 | Set: 8:14
Altitude: 12.7°   Azimuth: 126.2°   Direction: South-East

51 Aquilae is a double hypergiant star of spectral class F0 in the constellation of Aquila.

51 Aquilae visual magnitude is 5.39. Because of its faintness, 51 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.

Celestial coordinates and finder chart of 51 Aquilae

Finder chart 51 Aquilae star
Simplified finder chart for 51 Aquilae.

51 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 51 Aquilae are provided in the following table:

19h 50m 46s
-10° 45’ 48”
Image of 51 Aquilae star
DSS2 image of 51 Aquilae. The red arrow shows the motion of 51 Aquilae during the next 10000 years (-5.00 arcmin in Right Ascension and 5.50 arcmin in declination);

Key facts about 51 Aquilae


and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where 51 Aquilae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 51 Aquilae. Attribution: Richard Powell / CC BY-SA

51 Aquilae star system properties

51 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 51 Aquilae double sysyem:

21.1 arcsec

Distance of 51 Aquilae from the Sun and relative movement

51 Aquilae is distant 86.11 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

26.41 pc
86.11 ly
6 km/s
-0.03 arcsec/year
0.033 arcsec/year

Alternative designations of 51 Aquilae


Visibility of 51 Aquilae from your location

Today's 51 Aquilae rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 100.8°
Max altitude: 27.8°
Azimuth: 259.2°