Epoch J2000.0 Equinox J2000.0
|Apparent magnitude (V)||+4.50|
|Distance||910 ± 210 ly
(278 ± 63 pc)
The primary component, ο Cassiopeiae A, is a blue-white B-type giant with a mean apparent magnitude of +4.54 and a mass of 9.4☉. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +4.50 to +4.62. The primary is a spectroscopic binary, and its close companion completes one orbit every 2.83 years (1,031.3 days). A more distant companion, ο Cassiopeiae B, lies 33.6 arcseconds away. It is an eleventh magnitude, yellow-white F-type main sequence dwarf.
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