HR6857

Below the horizon. Rise: 12:45 | Tran: 19:19 | Set: 1:58

Alt: -6.76° Az: 69.30° Direction: East-North-East

HR6857 is a double giant star of spectral class K2 in the constellation of Ophiuchus.

HR6857 visual magnitude is 5.39. Because of its faintness, HR6857 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

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);

Celestial Coordinates

Apparent

Right Ascension 18h 20m 21s

Declination +07° 16’ 17”

Hour Angle 16h 37m 52s

Sideral Time 10h 58m 13s

J2000

Right Ascension 18h 19m 09s

Declination +07° 15’ 34”

Galactic Coordinates

Galactic Longitude 35.79°

Galactic Latitude 10.46°

Finder Chart

Simplified finder chart for HR6857.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.39

Class Giant

Absolute magnitude 2.13

Spectral Type K2III

Color Index (B-V) 1.07

Temperature 4581K

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

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

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:

Main star magnitude 5.39

Secondary star magnitude 12.09

Magnitude difference 6.7

Separation 42.2 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 44.96

Distance (light year) 146.58

Radial Speed -8 km/s

Proper Motion RA -0.047 arcsec/y

Proper Motion Dec 0.002"/y

Alternative Designations

Henry Draper Catalogue HD168387

SAO Catalogue SAO123353

Hipparcos Catalogue HIP89772

Durchmusterung Catalogue BD+07 3629

Aitken Double Star Catalogue ADS11254

Visibility from Your Location

Today's HR6857 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 82.7° RISE 12:45

Max altitude: 45.8° TRANSIT 19:19

Azimuth: 277.3° SET 1:58

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Ophiuchus