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physical object > natural object > celestial body > collection of stars > star system > binary star > close binary > eclipsing binary > VV Cephei star
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VV Cephei star comparison table
Subject is a kind of has definition
eclipsing binaryclose binaryEclipsing variables whose orbital plane lies so nearly in the line of sight that eclipses, as seen from the Earth, can occur and can be detected from their light curves.
VV Cephei stareclipsing binaryEclipsing binaries with M supergiant primaries and blue (usually B) supergiant or giant secondaries. They have a rich emission spectrum. Sandage (1974) suggests Mv = - 7.3 for the M2p component of VV Cep.

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