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: 21:02 south
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All Constellations » Cassiopeia » 

31 Cassiopeiae

31 Cassiopeiae is a hypergiant star in the constellation of Cassiopeia.

31 Cassiopeiae visual magnitude is 5.29. Because of its reltive faintness, 31 Cassiopeiae 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 31 Cassiopeiae:

31 Cassiopeiae is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 44°.

Celestial coordinates and finder chart of 31 Cassiopeiae

31 Cassiopeiae is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 31 Cassiopeiae are provided in the following table:

01h 10m 39s
+68° 46’ 42”

The simplified sky map below shows the position of 31 Cassiopeiae in the sky:

Finder chart 31 Cassiopeiae star
Simplified finder chart for 31 Cassiopeiae.

Visibility of 31 Cassiopeiae from your location

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

31 Cassiopeiae is circumpolar and transits at 08:40 UTC (altitude: 72.7°)

Digitized Sky Survey image of 31 Cassiopeiae

The image below is a photograph of 31 Cassiopeiae 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 31 Cassiopeiae is 0.036 arcsec per year in Right Ascension and -0.031 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 31 Cassiopeiae star
DSS2 image of 31 Cassiopeiae. The red arrow shows the motion of 31 Cassiopeiae during the next 10000 years (6.00 arcmin in Right Ascension and -5.17 arcmin in declination);

Distance of 31 Cassiopeiae from the Sun and relative movement

31 Cassiopeiae is distant 317.74 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

97.47 pc
317.74 ly
1 km/s
0.036 arcsec/year
-0.031 arcsec/year

Spectral properties of 31 Cassiopeiae

31 Cassiopeiae belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where 31 Cassiopeiae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 31 Cassiopeiae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 31 Cassiopeiae

31 Cassiopeiae