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: 6:55  
clear_day Transit: 12:49  
SunsetSet: 18:41 south
sunny DaytimeWhat's Visible Now
All Constellations » Scorpius » 


Altitude: -7.6°   Azimuth: 144.8°   Direction: South-East

HR6539 is a hypergiant star in the constellation of Scorpius.

HR6539 visual magnitude is 6.48. Because of its reltive faintness, HR6539 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 HR6539:


HR6539 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -7.6°
Azimuth: 144.8°
Direction: South-East

Celestial coordinates and finder chart of HR6539

HR6539 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 HR6539 are provided in the following table:

17h 35m 43s
-37° 26’ 23”

The simplified sky map below shows the position of HR6539 in the sky:

Finder chart HR6539 star
Simplified finder chart for HR6539.

Visibility of HR6539 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 HR6539 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: 127.4°
Max altitude: 1.1°
Azimuth: 232.6°

Digitized Sky Survey image of HR6539

The image below is a photograph of HR6539 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 HR6539 is -0.013 arcsec per year in Right Ascension and -0.038 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6539 star
DSS2 image of HR6539. The red arrow shows the motion of HR6539 during the next 10000 years (-2.17 arcmin in Right Ascension and -6.33 arcmin in declination);

Distance of HR6539 from the Sun and relative movement

HR6539 is distant 338.17 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

103.73 pc
338.17 ly
-8 km/s
-0.013 arcsec/year
-0.038 arcsec/year

Spectral properties of HR6539

HR6539 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR6539 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6539. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6539