Your guide to the Solar System and the night sky
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🌎  Greenwich, United Kingdom [change]

47 Cygni

47 Cygni is a multiple supergiant star in the constellation of Cygnus.

47 Cygni visual magnitude is 4.61. Because of its moderate brightness, 47 Cygni should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 47 Cygni:

4.61
Supergiant
47 Cygni is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 47 Cygni

47 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 47 Cygni are provided in the following table:

20h 33m 54s
+35° 15’ 02”
75.43°
-2.93°
Cygnus

The simplified sky map below shows the position of 47 Cygni in the sky:

Finder chart 47 Cygni star
Simplified finder chart for 47 Cygni.

Visibility of 47 Cygni from your location

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

Today's 47 Cygni rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 54.7°
Max altitude: 73.8°
Azimuth: 305.3°
47 Cygni is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 47 Cygni

The image below is a photograph of 47 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 47 Cygni is 0.002 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 47 Cygni star
DSS2 image of 47 Cygni. The red arrow shows the motion of 47 Cygni during the next 100000 years (3.33 arcmin in Right Ascension and -10.00 arcmin in declination);

Distance of 47 Cygni from the Sun and relative movement

47 Cygni is distant 928.77 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

284.90 pc
928.77 ly
-4 km/s
0.002 arcsec/year
-0.006 arcsec/year

Spectral properties of 47 Cygni

47 Cygni belongs to spectral class K2 and has a luminosity class of I corresponding to a supergiant star.

-2.66
K2I
3649K

The red dot in the diagram below shows where 47 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 47 Cygni. Attribution: Richard Powell / CC BY-SA

47 Cygni star system properties

47 Cygni is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 47 Cygni double sysyem:

4.61
10.21
5.6
117.6 arcsec

Alternative designations of 47 Cygni

SAO70203
SAO70203