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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: 7:41  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 6.3°   Azimuth: 22.7°   Direction: North-North-East

HR8155 is a multiple sub-giant star in the constellation of Cygnus.

HR8155 visual magnitude is 6.15. Because of its reltive faintness, HR8155 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 HR8155:


HR8155 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 6.3°
Azimuth: 22.7°
Direction: North-North-East

Celestial coordinates and finder chart of HR8155

HR8155 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 HR8155 are provided in the following table:

21h 18m 55s
+41° 02’ 26”

The simplified sky map below shows the position of HR8155 in the sky:

Finder chart HR8155 star
Simplified finder chart for HR8155.

Visibility of HR8155 from your location

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

HR8155 is circumpolar and transits at 16:37 UTC (altitude: 79.6°)

Digitized Sky Survey image of HR8155

The image below is a photograph of HR8155 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 HR8155 is -0.006 arcsec per year in Right Ascension and 0.009 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR8155 star
DSS2 image of HR8155. The red arrow shows the motion of HR8155 during the next 100000 years (-10.00 arcmin in Right Ascension and 15.00 arcmin in declination);

Distance of HR8155 from the Sun and relative movement

HR8155 is distant 1,697.92 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

520.83 pc
1,697.92 ly
7 km/s
-0.006 arcsec/year
0.009 arcsec/year

Spectral properties of HR8155

HR8155 belongs to spectral class A5 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR8155 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8155. Attribution: Richard Powell / CC BY-SA

HR8155 star system properties

HR8155 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 HR8155 double sysyem:

56 arcsec

Alternative designations of HR8155