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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
SunriseRise: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Cassiopeia » 


Altitude: 32.3°   Azimuth: 34.7°   Direction: North-East

HR839 is a double star in the constellation of Cassiopeia.

HR839 visual magnitude is 6.45. Because of its reltive faintness, HR839 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR839 is -0.066 arcsec per year in Right Ascension and 0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR839 star
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);

Key facts about HR839


HR839 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 32.3°
Azimuth: 34.7°
Direction: North-East

Celestial coordinates and finder chart of HR839

HR839 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR839 are provided in the following table:

02h 51m 45s
+58° 18’ 52”

The simplified sky map below shows the position of HR839 in the sky:

Finder chart HR839 star
Simplified finder chart for HR839.

Visibility of HR839 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR839 is circumpolar and transits at 16:39 UTC (altitude: 83.2°)

Distance of HR839 from the Sun and relative movement

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.

87.41 pc
284.97 ly
-5 km/s
-0.066 arcsec/year
0.015 arcsec/year

Spectral properties of HR839

HR839 belongs to spectral class A1


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

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

HR839 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:

192.7 arcsec

Alternative designations of HR839