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: 4:47  
clear_day Transit: 12:56  
SunsetSet: 21:06 south
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All Constellations » Cassiopeia » 

47 Cassiopeiae

47 Cassiopeiae is a double hypergiant star in the constellation of Cassiopeia.

47 Cassiopeiae visual magnitude is 5.38. Because of its reltive faintness, 47 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 47 Cassiopeiae:

47 Cassiopeiae is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 52°.

Celestial coordinates and finder chart of 47 Cassiopeiae

47 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 47 Cassiopeiae are provided in the following table:

02h 05m 07s
+77° 16’ 53”

The simplified sky map below shows the position of 47 Cassiopeiae in the sky:

Finder chart 47 Cassiopeiae star
Simplified finder chart for 47 Cassiopeiae.

Visibility of 47 Cassiopeiae from your location

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

47 Cassiopeiae is circumpolar and transits at 09:18 UTC (altitude: 64.2°)

Digitized Sky Survey image of 47 Cassiopeiae

The image below is a photograph of 47 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 47 Cassiopeiae is 0.125 arcsec per year in Right Ascension and -0.056 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 47 Cassiopeiae star
DSS2 image of 47 Cassiopeiae. The red arrow shows the motion of 47 Cassiopeiae during the next 1000 years (2.08 arcmin in Right Ascension and -0.93 arcmin in declination);

Distance of 47 Cassiopeiae from the Sun and relative movement

47 Cassiopeiae is distant 109.40 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

33.56 pc
109.40 ly
-26 km/s
0.125 arcsec/year
-0.056 arcsec/year

Spectral properties of 47 Cassiopeiae

47 Cassiopeiae belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where 47 Cassiopeiae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 47 Cassiopeiae. Attribution: Richard Powell / CC BY-SA

47 Cassiopeiae star system properties

47 Cassiopeiae is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 47 Cassiopeiae double sysyem:

95.6 arcsec

Alternative designations of 47 Cassiopeiae

47 Cassiopeiae