Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:49  
clear_day Transit: 12:56  
SunsetSet: 21:04 south
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All Constellations » Cygnus » 

23 Cygni

23 Cygni is a main-sequence star in the constellation of Cygnus.

23 Cygni visual magnitude is 5.14. Because of its reltive faintness, 23 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 23 Cygni:

23 Cygni is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 26°.

Celestial coordinates and finder chart of 23 Cygni

23 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 23 Cygni are provided in the following table:

19h 53m 17s
+57° 31’ 24”

The simplified sky map below shows the position of 23 Cygni in the sky:

Finder chart 23 Cygni star
Simplified finder chart for 23 Cygni.

Visibility of 23 Cygni from your location

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

23 Cygni is circumpolar and transits at 03:15 UTC (altitude: 84.0°)

Digitized Sky Survey image of 23 Cygni

The image below is a photograph of 23 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 23 Cygni is 0.009 arcsec per year in Right Ascension and 0.013 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 23 Cygni star
DSS2 image of 23 Cygni. The red arrow shows the motion of 23 Cygni during the next 10000 years (1.50 arcmin in Right Ascension and 2.17 arcmin in declination);

Distance of 23 Cygni from the Sun and relative movement

23 Cygni is distant 637.96 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

195.69 pc
637.96 ly
-25 km/s
0.009 arcsec/year
0.013 arcsec/year

Spectral properties of 23 Cygni

23 Cygni belongs to spectral class B5 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 23 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 23 Cygni. Attribution: Richard Powell / CC BY-SA

Alternative designations of 23 Cygni