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In Evidence

New Comet C/2025 J1 (Borisov) Discovered in May 2025
Detailed information about the discovery of Comet C/2025 J1 (Borisov) and pointers to useful resources to track and observe it. Read more...

Other stars in Cygnus
All Constellations » Cygnus » 

Sadr - γ Cygni (gamma Cygni)

Above the horizon.  Circumpolar today
Alt: 78.30°   Az: 199.77°   Direction: South-South-West

Sadr, also designated as γ Cygni (gamma Cygni), is a variable and multiple supergiant star of spectral class F8 in the constellation of Cygnus.

Sadr visual magnitude is 2.2, making it the 63th brightest star in the sky. Because of its brightness, Sadr 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 Sadr - γ Cygni (gamma Cygni) star
DSS2 image of Sadr. The red arrow shows the motion of Sadr during the next 100000 years (6.67 arcmin in Right Ascension and 0.00 arcmin in declination);

Celestial Coordinates

Apparent

20h 23m 08s
+40° 20’ 20”
00h 20m 38s
20h 43m 47s

J2000

20h 22m 13s
+40° 15’ 24”

Galactic Coordinates

78.15°
1.87°

Finder Chart

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Finder chart for Sadr - γ Cygni (gamma Cygni).

Magnitude, Color, Spectral Class

⬤
2.2
Supergiant

-6.15
F8I
0.68
5671K

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

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

Star System Properties

Sadr 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 Sadr double sysyem:

2.2
10.7
8.5
141.2 arcsec

Distance, Radial Speed, Proper Motion

Sadr is distant 1,523.36 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

467.29
1,523.36
-8 km/s
0.004 arcsec/y

Alternative Designations

Sadr
γ Cygni
(gamma Cygni)
37 Cygni
HD194093
SAO49528
SAO49528
HIP100453
BD+39 4159
765
13048
ADS13765

Visibility from Your Location

Sadr - γ Cygni (gamma Cygni) is circumpolar and transits at 04:38 UTC (altitude: 78.9°)