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[vsnet-chat 300] activity of CH Cyg

   Regarding the activity of CH Cyg, the 756-day periodicity was quite
strong in the visual light curve between 1960 and 1975; the activity probably
started around 1959.   Maxima times (eye estimates from the VSOLJ data):

   2437250
     38020
     38890
    (39500:) - maximum missed
     40200
     40900
     41500-600
     42480

   There were no evidence of sharp eclipses.

   Is this activity related to the emergence of symbiotic activity around
this time?

Regards,
Taichi Kato

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