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🌎  Greenwich, United Kingdom [change]


HR7799 is a giant star in the constellation of Sagittarius.

HR7799 visual magnitude is 6.09. Because of its reltive faintness, HR7799 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 HR7799:

HR7799 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR7799

HR7799 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7799 are provided in the following table:

20h 25m 47s
-40° 47’ 47”

The simplified sky map below shows the position of HR7799 in the sky:

Finder chart HR7799 star
Simplified finder chart for HR7799.

Visibility of HR7799 from your location

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

HR7799 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR7799

The image below is a photograph of HR7799 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 HR7799 is -0.102 arcsec per year in Right Ascension and -0.093 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR7799 star
DSS2 image of HR7799. The red arrow shows the motion of HR7799 during the next 1000 years (-1.70 arcmin in Right Ascension and -1.55 arcmin in declination);

Distance of HR7799 from the Sun and relative movement

HR7799 is distant 352.43 light years from the Sun and it is moving far from the Sun at the speed of 42 kilometers per second.

108.11 pc
352.43 ly
42 km/s
-0.102 arcsec/year
-0.093 arcsec/year

Spectral properties of HR7799

HR7799 belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR7799 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7799. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7799