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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 6:38 
Transit: 12:54 
Sunset: 19:10
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All Constellations » Cygnus » 

HR7638

Above the horizon.  Circumpolar today
Alt: 56.35°   Az: 273.67°   Direction: West

HR7638 is a multiple main-sequence star of spectral class A3 in the constellation of Cygnus.

HR7638 visual magnitude is 6.43. Because of its faintness, HR7638 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 HR7638 star
DSS2 image of HR7638. The red arrow shows the motion of HR7638 during the next 100000 years (1.67 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates

Apparent

19h 58m 46s
+42° 19’ 43”
03h 13m 40s
23h 12m 26s

J2000

19h 57m 56s
+42° 15’ 38”

Galactic Coordinates

77.36°
6.79°

Finder Chart

Finder chart HR7638 star
Simplified finder chart for HR7638.

Magnitude, Color, Spectral Class

6.43
Main-sequence

-1.52
A3V
10125K

The red dot in the diagram below shows where HR7638 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7638. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7638 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 HR7638 double sysyem:

6.43
7.63
1.2
0.1 arcsec

Distance, Radial Speed, Proper Motion

HR7638 is distant 1,268.48 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

389.11
1,268.48
-6 km/s
0.001 arcsec/y
-0.003"/y

Alternative Designations

SAO49031
SAO49031

Visibility from Your Location

HR7638 is circumpolar and transits at 20:13 UTC (altitude: 80.8°)