η Cygni (eta Cygni)
η Cygni is a variable and multiple hypergiant star of spectral class K0 in the constellation of Cygnus.
η Cygni visual magnitude is 3.89. Because of its moderate brightness, η 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 η Cygni is situated in the Hertzsprung–Russell diagram.
Star System Properties
η Cygni 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 η Cygni double sysyem:
Distance, Radial Speed, Proper Motion
η Cygni is distant 139.32 light years from the Sun and it is moving towards the Sun at the speed of 27 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's η Cygni (eta Cygni) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):