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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: 6:57  
clear_day Transit: 12:11  
SunsetSet: 17:27
sunny DaytimeWhat's Visible Now?
All Constellations » Sagittarius » 


Altitude: 9.9°   Azimuth: 179.9°   Direction: South

HR7801 is a bright giant star in the constellation of Sagittarius.

HR7801 visual magnitude is 5.85. Because of its reltive faintness, HR7801 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR7801 is 0.014 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7801 star
DSS2 image of HR7801. The red arrow shows the motion of HR7801 during the next 10000 years (2.33 arcmin in Right Ascension and 1.17 arcmin in declination);

Key facts about HR7801

Bright giant

HR7801 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 9.9°
Azimuth: 179.9°
Direction: South

Celestial coordinates and finder chart of HR7801

HR7801 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 HR7801 are provided in the following table:

20h 25m 26s
-28° 39’ 47”

The simplified sky map below shows the position of HR7801 in the sky:

Finder chart HR7801 star
Simplified finder chart for HR7801.

Visibility of HR7801 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 HR7801 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: 118.7°
Max altitude: 9.9°
Azimuth: 241.3°

Distance of HR7801 from the Sun and relative movement

HR7801 is distant 540.63 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

165.84 pc
540.63 ly
-7 km/s
0.014 arcsec/year
0.007 arcsec/year

Spectral properties of HR7801

HR7801 belongs to spectral class G8 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR7801 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7801. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7801