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27 Canis Majoris : ウィキペディア英語版
27 Canis Majoris

27 Canis Majoris, also called 27 CMa, is a star system in the constellation Canis Major. It is approximately 1580 light years from Earth and has a mean apparent magnitude of +4.42.
The primary component, 27 Canis Majoris A, is a blue-white B-type giant with an apparent magnitude of +4.9. It is also a spectroscopic binary with an orbital period of 0.262 days.
The second component, 27 Canis Majoris B, is separated from the primary by 0.1 arcseconds and has an orbital period of 31 years. Its apparent magnitude is +5.4 and it is classified as a Gamma Cassiopeiae type variable star. Due to its variable nature, the brightness of the system varies from magnitude +4.42 to +4.82.
==References==




抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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