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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: 6:46  
clear_day Transit: 12:11  
SunsetSet: 17:36
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All Constellations » Horologium » 


Altitude: -29.9°   Azimuth: 192.6°   Direction: South-South-West

HR722 is a variable giant star in the constellation of Horologium.

HR722 visual magnitude is 6.41. Because of its reltive faintness, HR722 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 HR722 is -0.029 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR722 star
DSS2 image of HR722. The red arrow shows the motion of HR722 during the next 10000 years (-4.83 arcmin in Right Ascension and -3.17 arcmin in declination);

Key facts about HR722


HR722 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -29.9°
Azimuth: 192.6°
Direction: South-South-West

Celestial coordinates and finder chart of HR722

HR722 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 HR722 are provided in the following table:

02h 25m 26s
-66° 29’ 40”

The simplified sky map below shows the position of HR722 in the sky:

Finder chart HR722 star
Simplified finder chart for HR722.

Visibility of HR722 from your location

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

HR722 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR722 from the Sun and relative movement

HR722 is distant 920.90 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

282.49 pc
920.90 ly
2 km/s
-0.029 arcsec/year
-0.019 arcsec/year

Spectral properties of HR722

HR722 belongs to spectral class M5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR722 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR722. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR722