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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: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sleep NighttimeWhat's Visible Now?
All Constellations » Cepheus » 


Altitude: 50.6°   Azimuth: 312.2°   Direction: North-West

HR8243 is a bright giant star in the constellation of Cepheus.

HR8243 visual magnitude is 5.53. Because of its reltive faintness, HR8243 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 HR8243:

Bright giant

HR8243 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 50.6°
Azimuth: 312.2°
Direction: North-West

Celestial coordinates and finder chart of HR8243

HR8243 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8243 are provided in the following table:

21h 30m 59s
+60° 27’ 33”

The simplified sky map below shows the position of HR8243 in the sky:

Finder chart HR8243 star
Simplified finder chart for HR8243.

Visibility of HR8243 from your location

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

HR8243 is circumpolar and transits at 16:57 UTC (altitude: 81.0°)

Digitized Sky Survey image of HR8243

The image below is a photograph of HR8243 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 HR8243 is -0.002 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR8243 star
DSS2 image of HR8243. The red arrow shows the motion of HR8243 during the next 100000 years (-3.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of HR8243 from the Sun and relative movement

HR8243 is distant 2,397.06 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

735.29 pc
2,397.06 ly
-15 km/s
-0.002 arcsec/year
-0.001 arcsec/year

Spectral properties of HR8243

HR8243 belongs to spectral class B1 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR8243 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8243. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8243