Omicron Cassiopeiae (ο Cas / ο Cassiopeiae) is a triple star system in the constellation Cassiopeia. It is approximately 910 light years from Earth. The primary component, ο Cassiopeiae A, is a blue-white B-type giant with a mean apparent magnitude of +4.54. 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.

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  • Omicron Cassiopeiae (ο Cas / ο Cassiopeiae) is a triple star system in the constellation Cassiopeia. It is approximately 910 light years from Earth. The primary component, ο Cassiopeiae A, is a blue-white B-type giant with a mean apparent magnitude of +4.54. 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. 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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  • +4.48
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  • +48°17′04″
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  • 910 ± 210
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  • 278 ± 63
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  • ο Cassiopeiae
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  • 22 Cassiopeiae, HR 193, HD 4180, BD+47°183, FK5 25, HIP 3504, SAO 36620, GC 882, ADS 622, CCDM J00447+4817
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  • 00h44m43.5s
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  • B5IIIe
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  • Omicron Cassiopeiae (ο Cas / ο Cassiopeiae) is a triple star system in the constellation Cassiopeia. It is approximately 910 light years from Earth. The primary component, ο Cassiopeiae A, is a blue-white B-type giant with a mean apparent magnitude of +4.54. 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.
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  • Omicron Cassiopeiae
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