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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: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sleep NighttimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 27.0°   Azimuth: 298.6°   Direction: West-North-West

HR7543 is a double main-sequence star in the constellation of Cygnus.

HR7543 visual magnitude is 5.77. Because of its reltive faintness, HR7543 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 HR7543:


HR7543 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 27.0°
Azimuth: 298.6°
Direction: West-North-West

Celestial coordinates and finder chart of HR7543

HR7543 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 HR7543 are provided in the following table:

19h 47m 27s
+38° 24’ 26”

The simplified sky map below shows the position of HR7543 in the sky:

Finder chart HR7543 star
Simplified finder chart for HR7543.

Visibility of HR7543 from your location

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

Today's HR7543 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 51.6°
Max altitude: 76.9°
Azimuth: 308.4°

Digitized Sky Survey image of HR7543

The image below is a photograph of HR7543 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 HR7543 is 0.015 arcsec per year in Right Ascension and -0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7543 star
DSS2 image of HR7543. The red arrow shows the motion of HR7543 during the next 10000 years (2.50 arcmin in Right Ascension and -0.50 arcmin in declination);

Distance of HR7543 from the Sun and relative movement

HR7543 is distant 488.76 light years from the Sun and it is moving towards the Sun at the speed of 28 kilometers per second.

149.93 pc
488.76 ly
-28 km/s
0.015 arcsec/year
-0.003 arcsec/year

Spectral properties of HR7543

HR7543 belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR7543 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7543. Attribution: Richard Powell / CC BY-SA

HR7543 star system properties

HR7543 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 HR7543 double sysyem:

24.7 arcsec

Alternative designations of HR7543