HR839

Above the horizon. Circumpolar today

Alt: 34.64° Az: 37.39° Direction: North-East

HR839 is a double star of spectral class A1 in the constellation of Cassiopeia.

HR839 visual magnitude is 6.45. Because of its faintness, HR839 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 HR839. The red arrow shows the motion of HR839 during the next 10000 years (-11.00 arcmin in Right Ascension and 2.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 02h 53m 38s

Declination +58° 24’ 55”

Hour Angle 16h 50m 02s

Sideral Time 19h 43m 41s

J2000

Right Ascension 02h 51m 45s

Declination +58° 18’ 52”

Galactic Coordinates

Galactic Longitude 138.2°

Galactic Latitude -0.94°

Finder Chart

Simplified finder chart for HR839.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.45

Class

Absolute magnitude 1.74

Spectral Type A1

Color Index (B-V) 0.1

Temperature 9028K

The red dot in the diagram below shows where HR839 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR839. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR839 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR839 double sysyem:

Main star magnitude 6.45

Secondary star magnitude 9.25

Magnitude difference 2.8

Separation 192.7 arcsec

Distance, Radial Speed, Proper Motion

HR839 is distant 284.97 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

Distance (parsec) 87.41

Distance (light year) 284.97

Radial Speed -5 km/s

Proper Motion RA -0.066 arcsec/y

Proper Motion Dec 0.015"/y

Alternative Designations

Henry Draper Catalogue HD17581

SAO Catalogue SAO23662

Hipparcos Catalogue HIP13347

Durchmusterung Catalogue BD+57 651

Visibility from Your Location

HR839 is circumpolar and transits at 01:40 UTC (altitude: 83.1°)

Set Location

Other stars in Cassiopeia