COMMISSION 27 OF THE I.A.U.
               INFORMATION BULLETIN ON VARIABLE STARS
                            Number 1494

                                                      Konkoly Observatory
                                                      Budapest
                                                      1978 October 23


         BV - OBSERVATIONS OF CH CYGNI IN 1977

CH Cyg is a well known semiregular variable star which was
new classified for spectroscopic reasons as Z And star (GCVS
First Suppl., 1971). Two outbursts were observed and a third
was announced by visual AAVSO observers (John E. Bortle, AAVSO
Circulars No. 79 and No. 80, 1977). Unfortunately the weather
conditions were so bad that only four photoelectric observations
could be done with the 31 cm refractor at Berlin. An uncooled
1P21 photomultiplier was used behind Schott filter combinations
BG 12 + GG 13 for B and GG 11 for V.


     Julian Date    V      B-V    N

     2443287d55    6.57   +1.31m  1
         289,44    6.43   +1.32   3
         319,45    6.67   +1.29   2
         328,42    6.60   +1.19   2

   The measurements are as good as 0.02 in V and 0.01 in B-V, N
is the number of individual observations.
   The magnitudes of the comparison stars were determined with
nearby UBV standard stars in two nights. One of the four used
comparison stars, SAO 048428 (F8), may be slightly variable as
indicated by unusually great scattering of the measurements.


                      U. HOPP, S. WITZIGMANN

                     Wilhelm Foerster Sternwarte,
                             Berlin