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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: 6:08  
clear_day Transit: 12:59  
SunsetSet: 19:51
sunny DaytimeWhat's Visible Now?
All Constellations » Capricornus » 


Altitude: 4.5°   Azimuth: 213.9°   Direction: South-West

HR7722 is a variable hypergiant star in the constellation of Capricornus.

HR7722 visual magnitude is 5.73. Because of its reltive faintness, HR7722 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 HR7722 is 1.244 arcsec per year in Right Ascension and -0.174 arcsec per year in Declination and the associated displacement for the next 100 years is represented with the red arrow.

Image of HR7722 star
DSS2 image of HR7722. The red arrow shows the motion of HR7722 during the next 100 years (2.07 arcmin in Right Ascension and -0.29 arcmin in declination);

Key facts about HR7722


HR7722 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 4.5°
Azimuth: 213.9°
Direction: South-West

Celestial coordinates and finder chart of HR7722

HR7722 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7722 are provided in the following table:

20h 15m 17s
-27° 01’ 58”

The simplified sky map below shows the position of HR7722 in the sky:

Finder chart HR7722 star
Simplified finder chart for HR7722.

Visibility of HR7722 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 HR7722 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: 117.0°
Max altitude: 11.5°
Azimuth: 243.0°

Distance of HR7722 from the Sun and relative movement

HR7722 is distant 28.77 light years from the Sun and it is moving towards the Sun at the speed of 54 kilometers per second.

8.82 pc
28.77 ly
-54 km/s
1.244 arcsec/year
-0.174 arcsec/year

Spectral properties of HR7722

HR7722 belongs to spectral class K0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR7722 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7722. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7722