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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:28 
Transit: 12:14 
Sunset: 17:00
wb_twilight   (Astronomical Twilight)  
What's Visible Now • Tonight Timeline
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All Constellations » Cygnus » 

4 Cygni

Above the horizon.  Rise: 23:44 | Tran: 10:15 | Set: 20:43
Alt: 10.77°   Az: 316.91°   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.

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

Apparent

19h 27m 03s
+36° 22’ 09”
08h 14m 09s
03h 41m 12s

J2000

19h 26m 09s
+36° 19’ 04”

Galactic Coordinates

69.11°
9.31°

Finder Chart

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Finder chart for 4 Cygni.

Magnitude, Color, Spectral Class

5.15
4 Cygni is also a Si chemically peculiar star.

-1.36
B9
11920K

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
653.31
-22 km/s
0.005 arcsec/y
0.014"/y

Alternative Designations

SAO68301
SAO68301

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°