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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 » 

HR7917

Above the horizon.  Rise: 20:31 | Tran: 5:37 | Set: 14:39
Alt: 34.26°   Az: 276.46°   Direction: West

HR7917 is a double main-sequence star of spectral class A2 in the constellation of Cygnus.

HR7917 visual magnitude is 6.08. Because of its faintness, HR7917 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 HR7917 star
DSS2 image of HR7917. The red arrow shows the motion of HR7917 during the next 10000 years (1.33 arcmin in Right Ascension and 6.00 arcmin in declination);

Celestial Coordinates

Apparent

20h 41m 39s
+29° 53’ 48”
04h 45m 13s
01h 26m 53s

J2000

20h 40m 36s
+29° 48’ 19”

Galactic Coordinates

71.9°
-7.32°

Finder Chart

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Finder chart for HR7917.

Magnitude, Color, Spectral Class

6.08
Main-sequence

1.51
A2V
8658K

The red dot in the diagram below shows where HR7917 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7917. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7917 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR7917 double sysyem:

6.08
10.58
4.5
0.9 arcsec

Distance, Radial Speed, Proper Motion

HR7917 is distant 267.21 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

81.97
267.21
-30 km/s
0.008 arcsec/y
0.036"/y

Alternative Designations

SAO88997
SAO88997

Visibility from Your Location

Today's HR7917 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.1°
Max altitude: 68.4°
Azimuth: 299.9°