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 » 

ω Cassiopeiae (omega Cassiopeiae)

ω Cassiopeiae is a variable giant star in the constellation of Cassiopeia.

ω Cassiopeiae visual magnitude is 4.99. Because of its moderate brightness, ω Cassiopeiae should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about ω Cassiopeiae:

ω Cassiopeiae (omega Cassiopeiae) is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 68°.

Celestial coordinates and finder chart of ω Cassiopeiae

ω 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 ω Cassiopeiae are provided in the following table:

01h 55m 59s
+68° 41’ 07”

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

Finder chart ω Cassiopeiae (omega Cassiopeiae) star
Simplified finder chart for ω Cassiopeiae (omega Cassiopeiae).

Visibility of ω Cassiopeiae from your location

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

ω Cassiopeiae (omega Cassiopeiae) is circumpolar and transits at 09:09 UTC (altitude: 72.8°)

Digitized Sky Survey image of ω Cassiopeiae

The image below is a photograph of ω 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 ω Cassiopeiae is 0.013 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ω Cassiopeiae (omega Cassiopeiae) star
DSS2 image of ω Cassiopeiae. The red arrow shows the motion of ω Cassiopeiae during the next 10000 years (2.17 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of ω Cassiopeiae from the Sun and relative movement

ω Cassiopeiae is distant 701.08 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

215.05 pc
701.08 ly
-24 km/s
0.013 arcsec/year
-0.011 arcsec/year

Spectral properties of ω Cassiopeiae

ω Cassiopeiae belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of ω Cassiopeiae

ω Cassiopeiae
(omega Cassiopeiae)
46 Cassiopeiae