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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: 6:35  
clear_day Transit: 12:10  
SunsetSet: 17:45
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Cygnus » 

β2 Cygni (beta2 Cygni)

Altitude: 45.5°   Azimuth: 101.8°   Direction: East-South-East

β2 Cygni is a multiple main-sequence star in the constellation of Cygnus.

β2 Cygni visual magnitude is 5.11. Because of its reltive faintness, β2 Cygni should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of β2 Cygni is -0.009 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of β2 Cygni (beta2 Cygni) star
DSS2 image of β2 Cygni. The red arrow shows the motion of β2 Cygni during the next 100000 years (-15.00 arcmin in Right Ascension and 0.00 arcmin in declination);

Key facts about β2 Cygni


β2 Cygni (beta2 Cygni) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 45.5°
Azimuth: 101.8°
Direction: East-South-East

Celestial coordinates and finder chart of β2 Cygni

β2 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 β2 Cygni are provided in the following table:

19h 30m 45s
+27° 57’ 55”

The simplified sky map below shows the position of β2 Cygni in the sky:

Finder chart β2 Cygni (beta2 Cygni) star
Simplified finder chart for β2 Cygni (beta2 Cygni).

Visibility of β2 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 β2 Cygni (beta2 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: 62.0°
Max altitude: 66.5°
Azimuth: 298.0°

Distance of β2 Cygni from the Sun and relative movement

β2 Cygni is distant 376.01 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

115.34 pc
376.01 ly
-18 km/s
-0.009 arcsec/year

Spectral properties of β2 Cygni

β2 Cygni belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where β2 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of β2 Cygni. Attribution: Richard Powell / CC BY-SA

β2 Cygni star system properties

β2 Cygni is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the β2 Cygni double sysyem:

34.7 arcsec

Alternative designations of β2 Cygni

β2 Cygni
(beta2 Cygni)