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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
SunriseRise: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sunny DaytimeWhat's Visible Now?
All Constellations » Lacerta » 


Altitude: 70.4°   Azimuth: 86.2°   Direction: East

HR8731 is a variable giant star in the constellation of Lacerta.

HR8731 visual magnitude is 5.43. Because of its reltive faintness, HR8731 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR8731 is 0.012 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8731 star
DSS2 image of HR8731. The red arrow shows the motion of HR8731 during the next 10000 years (2.00 arcmin in Right Ascension and -1.50 arcmin in declination);

Key facts about HR8731


HR8731 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 70.4°
Azimuth: 86.2°
Direction: East

Celestial coordinates and finder chart of HR8731

HR8731 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 HR8731 are provided in the following table:

22h 57m 04s
+48° 41’ 03”

The simplified sky map below shows the position of HR8731 in the sky:

Finder chart HR8731 star
Simplified finder chart for HR8731.

Visibility of HR8731 from your location

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

HR8731 is circumpolar and transits at 12:10 UTC (altitude: 87.2°)

Distance of HR8731 from the Sun and relative movement

HR8731 is distant 1,097.64 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

336.70 pc
1,097.64 ly
-22 km/s
0.012 arcsec/year
-0.009 arcsec/year

Spectral properties of HR8731

HR8731 belongs to spectral class B4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR8731 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR8731. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8731