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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
sleep NighttimeWhat's Visible Now?
All Constellations » Ophiuchus » 


Altitude: -13.6°   Azimuth: 75.9°   Direction: East-North-East

HR6578 is a variable supergiant star in the constellation of Ophiuchus.

HR6578 visual magnitude is 6.19. Because of its reltive faintness, HR6578 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 HR6578:


HR6578 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -13.6°
Azimuth: 75.9°
Direction: East-North-East

Celestial coordinates and finder chart of HR6578

HR6578 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 HR6578 are provided in the following table:

17h 40m 11s
-02° 09’ 08”

The simplified sky map below shows the position of HR6578 in the sky:

Finder chart HR6578 star
Simplified finder chart for HR6578.

Visibility of HR6578 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 HR6578 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: 92.2°
Max altitude: 36.4°
Azimuth: 267.8°

Digitized Sky Survey image of HR6578

The image below is a photograph of HR6578 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 HR6578 is -0.023 arcsec per year in Right Ascension and -0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6578 star
DSS2 image of HR6578. The red arrow shows the motion of HR6578 during the next 10000 years (-3.83 arcmin in Right Ascension and -3.00 arcmin in declination);

Distance of HR6578 from the Sun and relative movement

HR6578 is distant 544.24 light years from the Sun and it is moving towards the Sun at the speed of 49 kilometers per second.

166.94 pc
544.24 ly
-49 km/s
-0.023 arcsec/year
-0.018 arcsec/year

Spectral properties of HR6578

HR6578 belongs to spectral class K2 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR6578 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6578. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6578