Your Guide to the Solar System and the Night Sky
This site is free and ad-free thanks to the support of our users. If you can, please consider a donation.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sunny DaytimeWhat's Visible Now
All Constellations » Scorpius » 


Altitude: 0.4°   Azimuth: 178.7°   Direction: South

HR6557 is a supergiant star in the constellation of Scorpius.

HR6557 visual magnitude is 6.26. Because of its reltive faintness, HR6557 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 HR6557:


HR6557 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 0.4°
Azimuth: 178.7°
Direction: South

Celestial coordinates and finder chart of HR6557

HR6557 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 HR6557 are provided in the following table:

17h 37m 26s
-38° 03’ 56”

The simplified sky map below shows the position of HR6557 in the sky:

Finder chart HR6557 star
Simplified finder chart for HR6557.

Visibility of HR6557 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 HR6557 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: 128.1°
Max altitude: 0.5°
Azimuth: 231.9°

Digitized Sky Survey image of HR6557

The image below is a photograph of HR6557 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 HR6557 is -0.013 arcsec per year in Right Ascension and 0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6557 star
DSS2 image of HR6557. The red arrow shows the motion of HR6557 during the next 10000 years (-2.17 arcmin in Right Ascension and 4.33 arcmin in declination);

Distance of HR6557 from the Sun and relative movement

HR6557 is distant 2,834.78 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

869.57 pc
2,834.78 ly
12 km/s
-0.013 arcsec/year
0.026 arcsec/year

Spectral properties of HR6557

HR6557 belongs to spectral class G2 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR6557 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6557. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6557