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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
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All Constellations » Cygnus » 

20 Cygni

Altitude: 21.7°   Azimuth: 331.7°   Direction: North-North-West

20 Cygni is a variable giant star in the constellation of Cygnus.

20 Cygni visual magnitude is 5.03. Because of its reltive faintness, 20 Cygni should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 20 Cygni:


20 Cygni is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 21.7°
Azimuth: 331.7°
Direction: North-North-West

Celestial coordinates and finder chart of 20 Cygni

20 Cygni is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 20 Cygni are provided in the following table:

19h 50m 37s
+52° 59’ 17”

The simplified sky map below shows the position of 20 Cygni in the sky:

Finder chart 20 Cygni star
Simplified finder chart for 20 Cygni.

Visibility of 20 Cygni from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

20 Cygni is circumpolar and transits at 14:30 UTC (altitude: 88.5°)

Digitized Sky Survey image of 20 Cygni

The image below is a photograph of 20 Cygni from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 20 Cygni is -0.008 arcsec per year in Right Ascension and -0.068 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 20 Cygni star
DSS2 image of 20 Cygni. The red arrow shows the motion of 20 Cygni during the next 10000 years (-1.33 arcmin in Right Ascension and -11.33 arcmin in declination);

Distance of 20 Cygni from the Sun and relative movement

20 Cygni is distant 192.22 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

58.96 pc
192.22 ly
-20 km/s
-0.008 arcsec/year
-0.068 arcsec/year

Spectral properties of 20 Cygni

20 Cygni belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 20 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 20 Cygni. Attribution: Richard Powell / CC BY-SA

Alternative designations of 20 Cygni