HR7784

Above the horizon. Circumpolar today

Alt: 8.55° Az: 327.52° Direction: North-North-West

HR7784 is a multiple main-sequence star of spectral class A1 in the constellation of Cygnus.

HR7784 visual magnitude is 6.23. Because of its faintness, HR7784 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 HR7784. The red arrow shows the motion of HR7784 during the next 10000 years (-0.33 arcmin in Right Ascension and -3.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 21m 09s

Declination +39° 28’ 59”

Hour Angle 09h 06m 07s

Sidereal Time 05h 27m 16s

J2000

Right Ascension 20h 20m 15s

Declination +39° 24’ 11”

Galactic Coordinates

Galactic Longitude 77.23°

Galactic Latitude 1.69°

Finder Chart

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Finder chart for HR7784.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.23

Class Main-sequence

Absolute magnitude 1.04

Spectral Type A1V

Color Index (B-V) 0.06

Temperature 9434K

The red dot in the diagram below shows where HR7784 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7784. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7784 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 HR7784 double sysyem:

Main star magnitude 6.23

Secondary star magnitude 7.33

Magnitude difference 1.1

Separation 0.3 arcsec

Distance, Radial Speed, Proper Motion

HR7784 is distant 355.12 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

Distance (parsec) 108.93

Distance (light year) 355.12

Radial Speed -1 km/s

Proper Motion RA -0.002 arcsec/y

Proper Motion Dec -0.022"/y

Alternative Designations

Henry Draper Catalogue HD193702

SAO Catalogue SAO69856

Hipparcos Catalogue HIP100268

Durchmusterung Catalogue BD+38 4021

Aitken Double Star Catalogue ADS13728

Visibility from Your Location

HR7784 is circumpolar and transits at 15:09 UTC (altitude: 78.0°)

Set Location

Other stars in Cygnus