HR7818

Above the horizon. Circumpolar today

Alt: 21.72° Az: 7.44° Direction: North

HR7818 is a double sub-giant star of spectral class A2 in the constellation of Cygnus.

HR7818 visual magnitude is 6.44. Because of its faintness, HR7818 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.

DSS2 image of HR7818. The red arrow shows the motion of HR7818 during the next 10000 years (1.67 arcmin in Right Ascension and -1.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 25m 36s

Declination +59° 41’ 01”

Hour Angle 12h 55m 06s

Sidereal Time 09h 20m 43s

J2000

Right Ascension 20h 25m 05s

Declination +59° 36’ 00”

Galactic Coordinates

Galactic Longitude 94.55°

Galactic Latitude 12.38°

Finder Chart

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Finder chart for HR7818.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.44

Class Sub-giant

Absolute magnitude -0.88

Spectral Type A2IV

Color Index (B-V) 0.09

Temperature 9125K

The red dot in the diagram below shows where HR7818 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7818. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7818 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 HR7818 double sysyem:

Main star magnitude 6.44

Secondary star magnitude 6.74

Magnitude difference 0.3

Separation 0.2 arcsec

Distance, Radial Speed, Proper Motion

HR7818 is distant 947.67 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

Distance (parsec) 290.70

Distance (light year) 947.67

Radial Speed -22 km/s

Proper Motion RA 0.01 arcsec/y

Proper Motion Dec -0.007"/y

Alternative Designations

Henry Draper Catalogue HD194882

SAO Catalogue SAO32562

Hipparcos Catalogue HIP100714

Durchmusterung Catalogue BD+59 2228

Aitken Double Star Catalogue ADS13850

Visibility from Your Location

HR7818 is circumpolar and transits at 04:41 UTC (altitude: 81.8°)

In Evidence

Other stars in Cygnus

HR7818

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location

Set Location

In Evidence

Other stars in Cygnus

HR7818

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Star System Properties

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location