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: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:03 south
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All Constellations » Cassiopeia » 


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 skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR439:

HR439 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 20°.

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 08:59 UTC (altitude: 83.2°)

Digitized Sky Survey image of HR439

The image below is a photograph of HR439 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 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);

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