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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
SunriseRise: 5:43  
clear_day Transit: 12:56  
SunsetSet: 20:10
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All Constellations » Cygnus » 

ω1 Cygni (omega1 Cygni)

Altitude: 18.9°   Azimuth: 328.2°   Direction: North-North-West

ω1 Cygni is a multiple sub-giant star in the constellation of Cygnus.

ω1 Cygni visual magnitude is 4.95. Because of its moderate brightness, ω1 Cygni should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of ω1 Cygni is 0.013 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ω1 Cygni (omega1 Cygni) star
DSS2 image of ω1 Cygni. The red arrow shows the motion of ω1 Cygni during the next 10000 years (2.17 arcmin in Right Ascension and 1.33 arcmin in declination);

Key facts about ω1 Cygni


ω1 Cygni (omega1 Cygni) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 18.9°
Azimuth: 328.2°
Direction: North-North-West

Celestial coordinates and finder chart of ω1 Cygni

ω1 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 ω1 Cygni are provided in the following table:

20h 30m 03s
+48° 57’ 06”

The simplified sky map below shows the position of ω1 Cygni in the sky:

Finder chart ω1 Cygni (omega1 Cygni) star
Simplified finder chart for ω1 Cygni (omega1 Cygni).

Visibility of ω1 Cygni from your location

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

ω1 Cygni (omega1 Cygni) is circumpolar and transits at 06:15 UTC (altitude: 87.5°)

Distance of ω1 Cygni from the Sun and relative movement

ω1 Cygni is distant 869.33 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

266.67 pc
869.33 ly
-22 km/s
0.013 arcsec/year
0.008 arcsec/year

Spectral properties of ω1 Cygni

ω1 Cygni belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where ω1 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ω1 Cygni. Attribution: Richard Powell / CC BY-SA

ω1 Cygni star system properties

ω1 Cygni is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the ω1 Cygni double sysyem:

56.3 arcsec

Alternative designations of ω1 Cygni

ω1 Cygni
(omega1 Cygni)