σ Cygni (sigma Cygni)
σ Cygni is a variable supergiant star of spectral class B9 in the constellation of Cygnus.
σ Cygni visual magnitude is 4.23. Because of its moderate brightness, σ Cygni is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart

Magnitude, Color, Spectral Class
The red dot in the diagram below shows where σ Cygni is situated in the Hertzsprung–Russell diagram.

Distance, Radial Speed, Proper Motion
σ Cygni is distant 4,527.78 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.
Alternative Designations
Visibility from Your Location
σ Cygni (sigma Cygni) is circumpolar and transits at 05:21 UTC (altitude: 78.0°)