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GCVS Team
In the region of the open cluster h, khi Per. OH, H2O, SiO maser. In 1920 - 1969 there were secondary waves with cycles of 300d - 700d and Delta(m) ~1m [I.D.Howarth, JBAA 86, 210, 1976.]; in 1935 - 1961 P1 = 807d, P2 = 930d [I.Howarth, Light Curve 3, N1, 11, 1978.].
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