Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23


HR8109 is a giant star in the constellation of Cepheus.

HR8109 visual magnitude is 6.54. Because of its reltive faintness, HR8109 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 HR8109:

HR8109 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 27°.

Celestial coordinates and finder chart of HR8109

HR8109 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 HR8109 are provided in the following table:

21h 09m 28s
+63° 17’ 44”

The simplified sky map below shows the position of HR8109 in the sky:

Finder chart HR8109 star
Simplified finder chart for HR8109.

Visibility of HR8109 from your location

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

HR8109 is circumpolar and transits at 08:47 UTC (altitude: 78.2°)

Digitized Sky Survey image of HR8109

The image below is a photograph of HR8109 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 HR8109 is 0.013 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8109 star
DSS2 image of HR8109. The red arrow shows the motion of HR8109 during the next 10000 years (2.17 arcmin in Right Ascension and 0.83 arcmin in declination);

Distance of HR8109 from the Sun and relative movement

HR8109 is distant 846.75 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

259.74 pc
846.75 ly
-24 km/s
0.013 arcsec/year
0.005 arcsec/year

Spectral properties of HR8109

HR8109 belongs to spectral class B7 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR8109 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8109. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8109