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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:58 
Transit: 12:56 
Sunset: 20:55
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All Constellations » Cygnus » 

HR7791

Above the horizon.  Circumpolar today
Alt: 16.75°   Az: 346.64°   Direction: North-North-West

HR7791 is a multiple giant star of spectral class K4 in the constellation of Cygnus.

HR7791 visual magnitude is 6.18. Because of its faintness, HR7791 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 HR7791 star
DSS2 image of HR7791. The red arrow shows the motion of HR7791 during the next 10000 years (-2.67 arcmin in Right Ascension and 2.33 arcmin in declination);

Celestial Coordinates

Apparent

20h 21m 10s
+53° 40’ 39”
10h 32m 14s
06h 53m 25s

J2000

20h 20m 30s
+53° 35’ 45”

Galactic Coordinates

89.08°
9.6°

Finder Chart

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Finder chart for HR7791.

Magnitude, Color, Spectral Class

6.18
Giant

-2.31
K4III
3705K

The red dot in the diagram below shows where HR7791 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7791. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7791 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 HR7791 double sysyem:

6.18
12.38
6.2
6.5 arcsec

Distance, Radial Speed, Proper Motion

HR7791 is distant 1,630.00 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

500.00
1,630.00
-4 km/s
-0.016 arcsec/y
0.014"/y

Alternative Designations

SAO32491
SAO32491

Visibility from Your Location

HR7791 is circumpolar and transits at 04:17 UTC (altitude: 87.8°)