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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: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Sagittarius » 


Altitude: -28.3°   Azimuth: 84.7°   Direction: East

HR6825 is a double hypergiant star in the constellation of Sagittarius.

HR6825 visual magnitude is 6.07. Because of its reltive faintness, HR6825 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 HR6825:


HR6825 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -28.3°
Azimuth: 84.7°
Direction: East

Celestial coordinates and finder chart of HR6825

HR6825 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6825 are provided in the following table:

18h 15m 30s
-18° 39’ 41”

The simplified sky map below shows the position of HR6825 in the sky:

Finder chart HR6825 star
Simplified finder chart for HR6825.

Visibility of HR6825 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 HR6825 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: 108.7°
Max altitude: 19.9°
Azimuth: 251.3°

Digitized Sky Survey image of HR6825

The image below is a photograph of HR6825 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 HR6825 is 0.014 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6825 star
DSS2 image of HR6825. The red arrow shows the motion of HR6825 during the next 10000 years (2.33 arcmin in Right Ascension and 1.00 arcmin in declination);

Distance of HR6825 from the Sun and relative movement

HR6825 is distant 3,927.71 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

1,204.82 pc
3,927.71 ly
2 km/s
0.014 arcsec/year
0.006 arcsec/year

Spectral properties of HR6825

HR6825 belongs to spectral class A0 and has a luminosity class of I corresponding to a hypergiant star.


The red dot in the diagram below shows where HR6825 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6825. Attribution: Richard Powell / CC BY-SA

HR6825 star system properties

HR6825 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 HR6825 double sysyem:

10.1 arcsec

Alternative designations of HR6825