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: 4:46  
clear_day Transit: 12:56  
SunsetSet: 21:07 south
sunny DaytimeWhat's Visible Now
All Constellations » Cygnus » 


Altitude: -1.2°   Azimuth: 10.3°   Direction: North

HR8120 is a hypergiant star in the constellation of Cygnus.

HR8120 visual magnitude is 6.05. Because of its reltive faintness, HR8120 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 HR8120:


HR8120 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -1.2°
Azimuth: 10.3°
Direction: North

Celestial coordinates and finder chart of HR8120

HR8120 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 HR8120 are provided in the following table:

21h 13m 26s
+36° 38’ 00”

The simplified sky map below shows the position of HR8120 in the sky:

Finder chart HR8120 star
Simplified finder chart for HR8120.

Visibility of HR8120 from your location

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

Today's HR8120 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 53.4°
Max altitude: 75.2°
Azimuth: 306.6°
HR8120 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR8120

The image below is a photograph of HR8120 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 HR8120 is -0.018 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8120 star
DSS2 image of HR8120. The red arrow shows the motion of HR8120 during the next 10000 years (-3.00 arcmin in Right Ascension and 1.00 arcmin in declination);

Distance of HR8120 from the Sun and relative movement

HR8120 is distant 1,781.42 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

546.45 pc
1,781.42 ly
-13 km/s
-0.018 arcsec/year
0.006 arcsec/year

Spectral properties of HR8120

HR8120 belongs to spectral class F0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR8120 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8120. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8120