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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
north SunriseRise: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Sagittarius » 


Altitude: -1.3°   Azimuth: 147.2°   Direction: South-South-East

HR6777 is a hypergiant star in the constellation of Sagittarius.

HR6777 visual magnitude is 6.43. Because of its reltive faintness, HR6777 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 HR6777:


HR6777 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -1.3°
Azimuth: 147.2°
Direction: South-South-East

Celestial coordinates and finder chart of HR6777

HR6777 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 HR6777 are provided in the following table:

18h 09m 59s
-32° 43’ 10”

The simplified sky map below shows the position of HR6777 in the sky:

Finder chart HR6777 star
Simplified finder chart for HR6777.

Visibility of HR6777 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 HR6777 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: 122.7°
Max altitude: 5.8°
Azimuth: 237.3°

Digitized Sky Survey image of HR6777

The image below is a photograph of HR6777 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 HR6777 is 0.001 arcsec per year in Right Ascension and -0.149 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR6777 star
DSS2 image of HR6777. The red arrow shows the motion of HR6777 during the next 1000 years (0.02 arcmin in Right Ascension and -2.48 arcmin in declination);

Distance of HR6777 from the Sun and relative movement

HR6777 is distant 364.65 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

111.86 pc
364.65 ly
10 km/s
0.001 arcsec/year
-0.149 arcsec/year

Spectral properties of HR6777

HR6777 belongs to spectral class K0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where HR6777 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6777. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6777