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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: -18.3°   Azimuth: 33.7°   Direction: North-North-East

HR4531 is a variable and double hypergiant star in the constellation of Leo.

HR4531 visual magnitude is 5.88. Because of its reltive faintness, HR4531 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 HR4531:


HR4531 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -18.3°
Azimuth: 33.7°
Direction: North-North-East

Celestial coordinates and finder chart of HR4531

HR4531 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 HR4531 are provided in the following table:

11h 48m 38s
+14° 17’ 03”

The simplified sky map below shows the position of HR4531 in the sky:

Finder chart HR4531 star
Simplified finder chart for HR4531.

Visibility of HR4531 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 HR4531 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: 75.7°
Max altitude: 52.8°
Azimuth: 284.3°

Digitized Sky Survey image of HR4531

The image below is a photograph of HR4531 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 HR4531 is -0.107 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4531 star
DSS2 image of HR4531. The red arrow shows the motion of HR4531 during the next 1000 years (-1.78 arcmin in Right Ascension and 0.12 arcmin in declination);

Distance of HR4531 from the Sun and relative movement

HR4531 is distant 241.84 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

74.18 pc
241.84 ly
6 km/s
-0.107 arcsec/year
0.007 arcsec/year

Spectral properties of HR4531

HR4531 belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4531 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4531. Attribution: Richard Powell / CC BY-SA

HR4531 star system properties

HR4531 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR4531 double sysyem:

1.1 arcsec

Alternative designations of HR4531