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


Altitude: 37.5°   Azimuth: 256.2°   Direction: West-South-West

HR6559 is a double sub-giant star in the constellation of Hercules.

HR6559 visual magnitude is 6.1. Because of its reltive faintness, HR6559 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 HR6559:


HR6559 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 37.5°
Azimuth: 256.2°
Direction: West-South-West

Celestial coordinates and finder chart of HR6559

HR6559 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 HR6559 are provided in the following table:

17h 35m 59s
+20° 59’ 45”

The simplified sky map below shows the position of HR6559 in the sky:

Finder chart HR6559 star
Simplified finder chart for HR6559.

Visibility of HR6559 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 HR6559 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: 69.0°
Max altitude: 59.5°
Azimuth: 291.0°

Digitized Sky Survey image of HR6559

The image below is a photograph of HR6559 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 HR6559 is 0.012 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6559 star
DSS2 image of HR6559. The red arrow shows the motion of HR6559 during the next 10000 years (2.00 arcmin in Right Ascension and -2.50 arcmin in declination);

Distance of HR6559 from the Sun and relative movement

HR6559 is distant 383.53 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

117.65 pc
383.53 ly
-17 km/s
0.012 arcsec/year
-0.015 arcsec/year

Spectral properties of HR6559

HR6559 belongs to spectral class A7 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR6559 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6559. Attribution: Richard Powell / CC BY-SA

HR6559 star system properties

HR6559 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 HR6559 double sysyem:

10.4 arcsec

Alternative designations of HR6559