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physical object > natural object > celestial body > collection of stars > star system > binary star > close binary > eclipsing binary > beta Persei star > Algol |
Algol comparison table |
Subject | is part of | is an instance of | has distance | is a kind of | has synonym | has definition |
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beta Persei star | eclipsing binary | A class of eclipsing binary (see Algol) with periods of from 2 to 5 days, the depth of whose secondary minimum is almost negligible. | ||||
Algol | Perseus | beta Persei star | 25 pc | Demon star | An eclipsing system of at least three components (B8 V, K0, Am). Period of components A and B is about 68.8 hours; period of components A, B, and C is about 1.9 years. Long term observations also indicate a massive, unseen fourth component with a period of about 190 years. Algol is also an erratic radio source of about 0.5 AU diameter. |
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