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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:13 
Transit: 12:56 
Sunset: 20:39
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All Constellations » Cassiopeia » 

ο Cassiopeiae (omicron Cassiopeiae)

Above the horizon.  Circumpolar today
Alt: 39.18°   Az: 301.71°   Direction: West-North-West

ο Cassiopeiae is a variable and double giant star of spectral class B5 in the constellation of Cassiopeia.

ο Cassiopeiae visual magnitude is 4.54. Because of its moderate brightness, ο Cassiopeiae is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of ο Cassiopeiae (omicron Cassiopeiae) star
DSS2 image of ο Cassiopeiae. The red arrow shows the motion of ο Cassiopeiae during the next 10000 years (3.17 arcmin in Right Ascension and -1.33 arcmin in declination);

Celestial Coordinates

Apparent

00h 46m 08s
+48° 25’ 22”
05h 34m 08s
06h 20m 17s

J2000

00h 44m 43s
+48° 17’ 03”

Galactic Coordinates

121.78°
-14.57°

Finder Chart

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Finder chart for ο Cassiopeiae (omicron Cassiopeiae).

Magnitude, Color, Spectral Class

4.54
Giant

-2.68
B5III
11092K

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

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

Star System Properties

ο 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 ο Cassiopeiae double sysyem:

4.54
11.74
7.2
33.6 arcsec

Distance, Radial Speed, Proper Motion

ο Cassiopeiae is distant 905.56 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

277.78
905.56
-17 km/s
0.019 arcsec/y
-0.008"/y

Alternative Designations

ο Cassiopeiae
(omicron Cassiopeiae)
22 Cassiopeiae
SAO36620
SAO36620

Visibility from Your Location

ο Cassiopeiae (omicron Cassiopeiae) is circumpolar and transits at 09:24 UTC (altitude: 86.9°)