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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: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 58.5°   Azimuth: 82.5°   Direction: East

HR8003 is a variable hypergiant star in the constellation of Cygnus.

HR8003 visual magnitude is 5.45. Because of its reltive faintness, HR8003 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 HR8003:


HR8003 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 58.5°
Azimuth: 82.5°
Direction: East

Celestial coordinates and finder chart of HR8003

HR8003 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 HR8003 are provided in the following table:

20h 53m 18s
+45° 10’ 54”

The simplified sky map below shows the position of HR8003 in the sky:

Finder chart HR8003 star
Simplified finder chart for HR8003.

Visibility of HR8003 from your location

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

HR8003 is circumpolar and transits at 16:24 UTC (altitude: 83.7°)

Digitized Sky Survey image of HR8003

The image below is a photograph of HR8003 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 HR8003 is 0.014 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 HR8003 star
DSS2 image of HR8003. The red arrow shows the motion of HR8003 during the next 10000 years (2.33 arcmin in Right Ascension and 0.50 arcmin in declination);

Distance of HR8003 from the Sun and relative movement

HR8003 is distant 744.29 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

228.31 pc
744.29 ly
-24 km/s
0.014 arcsec/year
0.003 arcsec/year

Spectral properties of HR8003

HR8003 belongs to spectral class K0 and has a luminosity class of II corresponding to a hypergiant star.


The red dot in the diagram below shows where HR8003 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8003. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8003