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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
SunriseRise: 5:43  
clear_day Transit: 12:56  
SunsetSet: 20:10
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All Constellations » Cygnus » 


Altitude: 20.8°   Azimuth: 332.1°   Direction: North-North-West

HR7972 is a double sub-giant star in the constellation of Cygnus.

HR7972 visual magnitude is 6.27. Because of its reltive faintness, HR7972 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR7972 is 0.068 arcsec per year in Right Ascension and -0.158 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR7972 star
DSS2 image of HR7972. The red arrow shows the motion of HR7972 during the next 1000 years (1.13 arcmin in Right Ascension and -2.63 arcmin in declination);

Key facts about HR7972


HR7972 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 20.8°
Azimuth: 332.1°
Direction: North-North-West

Celestial coordinates and finder chart of HR7972

HR7972 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 HR7972 are provided in the following table:

20h 47m 52s
+52° 24’ 25”

The simplified sky map below shows the position of HR7972 in the sky:

Finder chart HR7972 star
Simplified finder chart for HR7972.

Visibility of HR7972 from your location

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

HR7972 is circumpolar and transits at 06:32 UTC (altitude: 89.1°)

Distance of HR7972 from the Sun and relative movement

HR7972 is distant 136.52 light years from the Sun and it is moving towards the Sun at the speed of 41 kilometers per second.

41.88 pc
136.52 ly
-41 km/s
0.068 arcsec/year
-0.158 arcsec/year

Spectral properties of HR7972

HR7972 belongs to spectral class G7 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR7972 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7972. Attribution: Richard Powell / CC BY-SA

HR7972 star system properties

HR7972 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR7972 double sysyem:

12.2 arcsec

Alternative designations of HR7972