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: 6:44  
clear_day Transit: 12:51  
SunsetSet: 18:57 south
sunny DaytimeWhat's Visible Now
All Constellations » Cygnus » 

25 Cygni

Altitude: 19.2°   Azimuth: 54.1°   Direction: North-East

25 Cygni is a variable sub-giant star in the constellation of Cygnus.

25 Cygni visual magnitude is 5.19. Because of its reltive faintness, 25 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 25 Cygni:


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

Altitude: 19.2°
Azimuth: 54.1°
Direction: North-East

Celestial coordinates and finder chart of 25 Cygni

25 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 25 Cygni are provided in the following table:

19h 59m 55s
+37° 02’ 34”

The simplified sky map below shows the position of 25 Cygni in the sky:

Finder chart 25 Cygni star
Simplified finder chart for 25 Cygni.

Visibility of 25 Cygni from your location

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

Today's 25 Cygni rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 53.0°
Max altitude: 75.6°
Azimuth: 307.0°

Digitized Sky Survey image of 25 Cygni

The image below is a photograph of 25 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 25 Cygni is 0.006 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 25 Cygni star
DSS2 image of 25 Cygni. The red arrow shows the motion of 25 Cygni during the next 100000 years (10.00 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of 25 Cygni from the Sun and relative movement

25 Cygni is distant 1,574.88 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

483.09 pc
1,574.88 ly
-4 km/s
0.006 arcsec/year
0.001 arcsec/year

Spectral properties of 25 Cygni

25 Cygni belongs to spectral class B3 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 25 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 25 Cygni. Attribution: Richard Powell / CC BY-SA

Alternative designations of 25 Cygni