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TimezoneEurope/London
Sunrise: 5:01 
Transit: 12:56 
Sunset: 20:52
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All Constellations » Aquila » 

Altair - α Aquilae (alpha Aquilae)

Below the horizon.  Rise: 22:08 | Tran: 4:55 | Set: 11:39
Alt: -4.07°   Az: 70.16°   Direction: East-North-East

Altair, also designated as α Aquilae (alpha Aquilae), is a multiple main-sequence star of spectral class A7 in the constellation of Aquila.

Altair visual magnitude is 0.77, making it the 12th brightest star in the sky. Because of its brightness, Altair is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Altair - α Aquilae (alpha Aquilae) star
DSS2 image of Altair. The red arrow shows the motion of Altair during the next 1000 years (8.97 arcmin in Right Ascension and 6.43 arcmin in declination);

Celestial Coordinates

Apparent

19h 52m 00s
+08° 56’ 03”
16h 47m 03s
12h 39m 03s

J2000

19h 50m 47s
+08° 52’ 05”

Galactic Coordinates

47.74°
-8.91°

Finder Chart

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Finder chart for Altair - α Aquilae (alpha Aquilae).

Magnitude, Color, Spectral Class

0.77
Main-sequence

2.21
A7V
8011K

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

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

Star System Properties

Altair 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 Altair double sysyem:

0.77
9.37
8.6
165.2 arcsec

Distance, Radial Speed, Proper Motion

Altair is distant 16.77 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

5.14
16.77
-26 km/s
0.538 arcsec/y
0.386"/y

Alternative Designations

Altair
α Aquilae
(alpha Aquilae)
SAO125122
SAO125122

Visibility from Your Location

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

Azimuth: 81.1°
Max altitude: 47.5°
Azimuth: 278.9°