Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:44  
clear_day Transit: 12:51  
SunsetSet: 18:57 south
sunny DaytimeWhat's Visible Now
All Constellations » Cygnus » 


Altitude: 15.1°   Azimuth: 38.5°   Direction: North-East

HR8004 is a main-sequence star in the constellation of Cygnus.

HR8004 visual magnitude is 6.66. Because of its reltive faintness, HR8004 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 HR8004:


HR8004 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 15.1°
Azimuth: 38.5°
Direction: North-East

Celestial coordinates and finder chart of HR8004

HR8004 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 HR8004 are provided in the following table:

20h 53m 26s
+42° 24’ 37”

The simplified sky map below shows the position of HR8004 in the sky:

Finder chart HR8004 star
Simplified finder chart for HR8004.

Visibility of HR8004 from your location

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

HR8004 is circumpolar and transits at 20:47 UTC (altitude: 80.9°)

Digitized Sky Survey image of HR8004

The image below is a photograph of HR8004 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 HR8004 is 0.011 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8004 star
DSS2 image of HR8004. The red arrow shows the motion of HR8004 during the next 10000 years (1.83 arcmin in Right Ascension and 0.33 arcmin in declination);

Distance of HR8004 from the Sun and relative movement

HR8004 is distant 450.90 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

138.31 pc
450.90 ly
-7 km/s
0.011 arcsec/year
0.002 arcsec/year

Spectral properties of HR8004

HR8004 belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR8004 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8004. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8004