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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:01 
Transit: 12:56 
Sunset: 20:52
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All Constellations » Cygnus » 

HR7798

Above the horizon.  Circumpolar today
Alt: 22.77°   Az: 316.29°   Direction: North-West

HR7798 is a variable hypergiant star of spectral class K0 in the constellation of Cygnus.

HR7798 visual magnitude is 5.58. Because of its faintness, HR7798 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 HR7798 star
DSS2 image of HR7798. The red arrow shows the motion of HR7798 during the next 10000 years (4.67 arcmin in Right Ascension and 7.33 arcmin in declination);

Celestial Coordinates

Apparent

20h 22m 55s
+45° 52’ 38”
07h 35m 01s
03h 57m 57s

J2000

20h 22m 05s
+45° 47’ 42”

Galactic Coordinates

82.7°
5.04°

Finder Chart

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Finder chart for HR7798.

Magnitude, Color, Spectral Class

5.58
Hypergiant

0.06
K0III
4559K

The red dot in the diagram below shows where HR7798 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7798. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR7798 is distant 414.76 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

127.23
414.76
-22 km/s
0.028 arcsec/y
0.044"/y

Alternative Designations

SAO49531
SAO49531

Visibility from Your Location

HR7798 is circumpolar and transits at 04:26 UTC (altitude: 84.4°)