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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:52  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 19.3°   Azimuth: 43.2°   Direction: North-East

HR7733 is a multiple giant star in the constellation of Cygnus.

HR7733 visual magnitude is 6.14. Because of its reltive faintness, HR7733 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR7733:


HR7733 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 19.3°
Azimuth: 43.2°
Direction: North-East

Celestial coordinates and finder chart of HR7733

HR7733 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 HR7733 are provided in the following table:

20h 13m 42s
+43° 22’ 45”

The simplified sky map below shows the position of HR7733 in the sky:

Finder chart HR7733 star
Simplified finder chart for HR7733.

Visibility of HR7733 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR7733 is circumpolar and transits at 14:57 UTC (altitude: 81.9°)

Digitized Sky Survey image of HR7733

The image below is a photograph of HR7733 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR7733 is 0 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR7733 star
DSS2 image of HR7733. The red arrow shows the motion of HR7733 during the next 100000 years (0.00 arcmin in Right Ascension and 10.00 arcmin in declination);

Distance of HR7733 from the Sun and relative movement

HR7733 is distant 737.56 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

226.24 pc
737.56 ly
-24 km/s
0.006 arcsec/year

Spectral properties of HR7733

HR7733 belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR7733 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7733. Attribution: Richard Powell / CC BY-SA

HR7733 star system properties

HR7733 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 HR7733 double sysyem:

57.3 arcsec

Alternative designations of HR7733