Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:54  
clear_day Transit: 12:49  
SunsetSet: 18:43 south
sleep NighttimeWhat's Visible Now
All Constellations » Sagittarius » 


Altitude: -24.7°   Azimuth: 251.1°   Direction: West-South-West

HR6780 is a double bright giant star in the constellation of Sagittarius.

HR6780 visual magnitude is 5.53. Because of its reltive faintness, HR6780 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 HR6780:

Bright giant

HR6780 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -24.7°
Azimuth: 251.1°
Direction: West-South-West

Celestial coordinates and finder chart of HR6780

HR6780 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 HR6780 are provided in the following table:

18h 10m 05s
-30° 43’ 42”

The simplified sky map below shows the position of HR6780 in the sky:

Finder chart HR6780 star
Simplified finder chart for HR6780.

Visibility of HR6780 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 HR6780 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: 120.7°
Max altitude: 7.8°
Azimuth: 239.3°

Digitized Sky Survey image of HR6780

The image below is a photograph of HR6780 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 HR6780 is 0.003 arcsec per year in Right Ascension and -0.027 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6780 star
DSS2 image of HR6780. The red arrow shows the motion of HR6780 during the next 10000 years (0.50 arcmin in Right Ascension and -4.50 arcmin in declination);

Distance of HR6780 from the Sun and relative movement

HR6780 is distant 360.22 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

110.50 pc
360.22 ly
-22 km/s
0.003 arcsec/year
-0.027 arcsec/year

Spectral properties of HR6780

HR6780 belongs to spectral class K1 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR6780 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6780. Attribution: Richard Powell / CC BY-SA

HR6780 star system properties

HR6780 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 HR6780 double sysyem:

3.9 arcsec

Alternative designations of HR6780