Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]


HR7805 is a double giant star in the constellation of Draco.

HR7805 visual magnitude is 5.69. Because of its reltive faintness, HR7805 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 HR7805:

HR7805 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 29°.

Celestial coordinates and finder chart of HR7805

HR7805 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 HR7805 are provided in the following table:

20h 21m 11s
+63° 58’ 49”

The simplified sky map below shows the position of HR7805 in the sky:

Finder chart HR7805 star
Simplified finder chart for HR7805.

Visibility of HR7805 from your location

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

HR7805 is circumpolar and transits at 11:11 UTC (altitude: 77.5°)

Digitized Sky Survey image of HR7805

The image below is a photograph of HR7805 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 HR7805 is -0.004 arcsec per year in Right Ascension and 0.023 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7805 star
DSS2 image of HR7805. The red arrow shows the motion of HR7805 during the next 10000 years (-0.67 arcmin in Right Ascension and 3.83 arcmin in declination);

Distance of HR7805 from the Sun and relative movement

HR7805 is distant 732.58 light years from the Sun and it is moving far from the Sun at the speed of 30 kilometers per second.

224.72 pc
732.58 ly
30 km/s
-0.004 arcsec/year
0.023 arcsec/year

Spectral properties of HR7805

HR7805 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR7805 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7805. Attribution: Richard Powell / CC BY-SA

HR7805 star system properties

HR7805 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR7805 double sysyem:

4.3 arcsec

Alternative designations of HR7805