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: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sleep NighttimeWhat's Visible Now
All Constellations » Ophiuchus » 


Altitude: 33.9°   Azimuth: 233.1°   Direction: South-West

HR6857 is a double giant star in the constellation of Ophiuchus.

HR6857 visual magnitude is 5.39. Because of its reltive faintness, HR6857 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 HR6857:


HR6857 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 33.9°
Azimuth: 233.1°
Direction: South-West

Celestial coordinates and finder chart of HR6857

HR6857 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 HR6857 are provided in the following table:

18h 19m 09s
+07° 15’ 34”

The simplified sky map below shows the position of HR6857 in the sky:

Finder chart HR6857 star
Simplified finder chart for HR6857.

Visibility of HR6857 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 HR6857 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: 82.7°
Max altitude: 45.8°
Azimuth: 277.3°

Digitized Sky Survey image of HR6857

The image below is a photograph of HR6857 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 HR6857 is -0.047 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6857 star
DSS2 image of HR6857. The red arrow shows the motion of HR6857 during the next 10000 years (-7.83 arcmin in Right Ascension and 0.33 arcmin in declination);

Distance of HR6857 from the Sun and relative movement

HR6857 is distant 146.58 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

44.96 pc
146.58 ly
-8 km/s
-0.047 arcsec/year
0.002 arcsec/year

Spectral properties of HR6857

HR6857 belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR6857 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6857. Attribution: Richard Powell / CC BY-SA

HR6857 star system properties

HR6857 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR6857 double sysyem:

42.2 arcsec

Alternative designations of HR6857