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public LocationGreenwich, UK
Sunrise: 5:01 
Transit: 13:04 
Sunset: 21:06
sunny   (Daytime)   What's Visible Now?
All Constellations » Cygnus » 

4 Cygni

Above the horizon.  Rise: 14:18 | Tran: 0:45 | Set: 11:17
Alt: 17.83°   Az: 306.59°   Direction: North-West

4 Cygni is a variable star of spectral class B9 in the constellation of Cygnus.

4 Cygni visual magnitude is 5.15. Because of its faintness, 4 Cygni 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.

4 Cygni is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere.

Image of 4 Cygni star
DSS2 image of 4 Cygni. The red arrow shows the motion of 4 Cygni during the next 10000 years (0.83 arcmin in Right Ascension and 2.33 arcmin in declination);

Celestial Coordinates


19h 27m 02s
+36° 22’ 05”
07h 13m 18s
02h 40m 20s


19h 26m 09s
+36° 19’ 04”

Galactic Coordinates


Finder Chart

Finder chart 4 Cygni star
Simplified finder chart for 4 Cygni.

Magnitude, Color, Spectral Class

4 Cygni is also a Si chemically peculiar star.


The red dot in the diagram below shows where 4 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 4 Cygni. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

4 Cygni is distant 653.31 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

200.40 pc
653.31 ly
-22 km/s
0.005 arcsec/y
0.014 "/y

Alternative Designations


Visibility from Your Location

Today's 4 Cygni rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 53.6°
Max altitude: 74.9°
Azimuth: 306.4°