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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: 6:38  
clear_day Transit: 12:10  
SunsetSet: 17:43
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Cassiopeia » 


Altitude: 51.8°   Azimuth: 307.8°   Direction: North-West

HR439 is a hypergiant star in the constellation of Cassiopeia.

HR439 visual magnitude is 5.7. Because of its reltive faintness, HR439 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR439 is 0.011 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 HR439 star
DSS2 image of HR439. The red arrow shows the motion of HR439 during the next 10000 years (1.83 arcmin in Right Ascension and 0.33 arcmin in declination);

Key facts about HR439


HR439 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 51.8°
Azimuth: 307.8°
Direction: North-West

Celestial coordinates and finder chart of HR439

HR439 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 HR439 are provided in the following table:

01h 33m 25s
+58° 19’ 39”

The simplified sky map below shows the position of HR439 in the sky:

Finder chart HR439 star
Simplified finder chart for HR439.

Visibility of HR439 from your location

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

HR439 is circumpolar and transits at 14:42 UTC (altitude: 83.2°)

Distance of HR439 from the Sun and relative movement

HR439 is distant 1,952.10 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

598.80 pc
1,952.10 ly
-1 km/s
0.011 arcsec/year
0.002 arcsec/year

Spectral properties of HR439

HR439 belongs to spectral class K0 and has a luminosity class of I corresponding to a hypergiant star.


The red dot in the diagram below shows where HR439 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR439. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR439