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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 12:59 
Sunset: 21:16
wb_twilight   (Civil Twilight)   What's Visible Now?


Above the horizon.  Rise: 17:51 | Tran: 3:39 | Set: 13:24
Altitude: 69.1°   Azimuth: 218.0°   Direction: South-West

HR7743 is a double hypergiant star of spectral class K0 in the constellation of Cygnus.

HR7743 visual magnitude is 5.66. Because of its faintness, HR7743 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.

Celestial coordinates and finder chart of HR7743

Finder chart HR7743 star
Simplified finder chart for HR7743.

HR7743 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7743 are provided in the following table:

20h 15m 23s
+33° 43’ 45”
Image of HR7743 star
DSS2 image of HR7743. The red arrow shows the motion of HR7743 during the next 1000 years (-0.67 arcmin in Right Ascension and -1.77 arcmin in declination);

Key facts about HR7743


and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR7743 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7743. Attribution: Richard Powell / CC BY-SA

HR7743 star system properties

HR7743 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 HR7743 double sysyem:

3 arcsec

Distance of HR7743 from the Sun and relative movement

HR7743 is distant 300.18 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

92.08 pc
300.18 ly
-10 km/s
-0.04 arcsec/year
-0.106 arcsec/year

Alternative designations of HR7743


Visibility of HR7743 from your location

Today's HR7743 rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.3°
Max altitude: 72.2°
Azimuth: 303.7°