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public  Palo Alto, United States Palo Alto, United States  ⓘ
TimezoneAmerica/Los_Angeles
Sunrise: 5:57 
Transit: 13:14 
Sunset: 20:30
wb_twilight   (Nautical Twilight)  
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All Constellations » Cygnus » 

55 Cygni

Above the horizon.  Rise: 17:15 | Tran: 2:44 | Set: 12:13
Alt: 34.00°   Az: 54.53°   Direction: North-East

55 Cygni is a variable and double supergiant star of spectral class B3 in the constellation of Cygnus.

55 Cygni visual magnitude is 4.84. Because of its moderate brightness, 55 Cygni is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of 55 Cygni star
DSS2 image of 55 Cygni. The red arrow shows the motion of 55 Cygni during the next 100000 years (6.67 arcmin in Right Ascension and 0.00 arcmin in declination);

Celestial Coordinates

Apparent

20h 49m 48s
+46° 12’ 35”
18h 50m 35s
15h 40m 23s

J2000

20h 48m 56s
+46° 06’ 51”

Galactic Coordinates

85.75°
1.49°

Finder Chart

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Finder chart for 55 Cygni.

Magnitude, Color, Spectral Class

4.84
Supergiant

-4.35
B3I
6827K

The red dot in the diagram below shows where 55 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 55 Cygni. Attribution: Richard Powell / CC BY-SA

Star System Properties

55 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 55 Cygni double sysyem:

4.84
11.14
6.3
21.3 arcsec

Distance, Radial Speed, Proper Motion

55 Cygni is distant 2,248.28 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

689.66
2,248.28
-7 km/s
0.004 arcsec/y

Alternative Designations

SAO50099
SAO50099

Visibility from Your Location

Today's 55 Cygni rise, transit and set times from Palo Alto, United States are the following (all times relative to the local timezone America/Los_Angeles):

Azimuth: 43.8°
Max altitude: 81.2°
Azimuth: 316.2°