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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 6:41 
Transit: 12:53 
Sunset: 19:05
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All Constellations » Cygnus » 

HR7781

Above the horizon.  Circumpolar today
Alt: 16.97°   Az: 1.45°   Direction: North

HR7781 is a multiple main-sequence star of spectral class A2 in the constellation of Cygnus.

HR7781 visual magnitude is 5.76. Because of its faintness, HR7781 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of HR7781 star
DSS2 image of HR7781. The red arrow shows the motion of HR7781 during the next 10000 years (-1.00 arcmin in Right Ascension and -3.83 arcmin in declination);

Celestial Coordinates

Apparent

20h 19m 01s
+55° 28’ 31”
12h 09m 47s
08h 28m 48s

J2000

20h 18m 24s
+55° 23’ 49”

Galactic Coordinates

90.45°
10.84°

Finder Chart

Finder chart HR7781 star
Simplified finder chart for HR7781.

Magnitude, Color, Spectral Class

5.76
Main-sequence

1.01
A2V
8932K

The red dot in the diagram below shows where HR7781 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7781. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7781 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 HR7781 double sysyem:

5.76
7.06
1.3
3.5 arcsec

Distance, Radial Speed, Proper Motion

HR7781 is distant 290.81 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

89.21
290.81
1 km/s
-0.006 arcsec/y
-0.023"/y

Alternative Designations

SAO32455
SAO32455

Visibility from Your Location

HR7781 is circumpolar and transits at 20:26 UTC (altitude: 86.0°)