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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: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sleep NighttimeWhat's Visible Now?
All Constellations » Leo » 


Altitude: 32.8°   Azimuth: 113.9°   Direction: East-South-East

HR4543 is a double hypergiant star in the constellation of Leo.

HR4543 visual magnitude is 6.35. Because of its reltive faintness, HR4543 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 HR4543:


HR4543 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 32.8°
Azimuth: 113.9°
Direction: East-South-East

Celestial coordinates and finder chart of HR4543

HR4543 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4543 are provided in the following table:

11h 50m 55s
+12° 16’ 44”

The simplified sky map below shows the position of HR4543 in the sky:

Finder chart HR4543 star
Simplified finder chart for HR4543.

Visibility of HR4543 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 HR4543 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: 77.7°
Max altitude: 50.8°
Azimuth: 282.3°

Digitized Sky Survey image of HR4543

The image below is a photograph of HR4543 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 HR4543 is -0.137 arcsec per year in Right Ascension and 0.023 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4543 star
DSS2 image of HR4543. The red arrow shows the motion of HR4543 during the next 1000 years (-2.28 arcmin in Right Ascension and 0.38 arcmin in declination);

Distance of HR4543 from the Sun and relative movement

HR4543 is distant 180.31 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

55.31 pc
180.31 ly
7 km/s
-0.137 arcsec/year
0.023 arcsec/year

Spectral properties of HR4543

HR4543 belongs to spectral class F0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4543 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4543. Attribution: Richard Powell / CC BY-SA

HR4543 star system properties

HR4543 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR4543 double sysyem:

14.9 arcsec

Alternative designations of HR4543