COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 3112


                                     Konkoly Observatory
                                     Budapest
                                     18 November 1987

                                     HU ISSN 0374-0676


         32 Cyg : UBV PHOTOMETRY OF ECLIPSE IN 1987

   The long period eclipsing binary 32 Cyg (V 1488 Cyg) was observed from
6 July to 28 July 1987 during a primary minimum, UBV photometry of this event
was obtained using a 0.3 m f/16 Cassegrain telescope and one channel photometer 
with photomultiplier EMI 9781B. Extinction and transformation coefficients 
were used to correct the differential magnitudes to the standard
system (Hall and Genet, 1982). The comparison star was HD 192985 as suggested
by Schroeder (1987).
   Observations of 32 Cyg are given differentially, with respect to HD 192985.
Each value is an average of three individual integrations. Internal errors were
+/- 0.01 magnitude. Estimation of amplitude was made from observations in each
band : U = 0.68, B = 0.17, V = 0.05.

                     Table I
Photometric observations of V1488 Cyg:

J.D.(Hel) 2440000+   DeltaU DeltaB     DeltaV
6983.482             0m55   -0m56      -1m89
6984.403             0.55   -0.55      -1.90
6986.491             0.59   -0.55      -1.92
6987.439             0.72   -0.55
6988.448             0.79   -0.50      -1.89
6989.554             1.08   -0.48      -1.91
6993.476             1.23   -0.38      -1.85
6996.500             1.02   -0.42      -1.89
6997.451             0.84   -0.49      -1.89
7005.388             0.50   -0.59      -1.88

  Time of minimum was determined using tracing paper method (U band), The
(O-C) value was calculated using the formula
  Min(I) = J.D.(Hel) 2444125.96 + 1147.4d  E,
given by SAC 58 (Cracow).

  Observed                     (O-C)       Filter
  J.D,(Hel) Min(I)
  2446992.92                  -1.04           U

  Figure 1 shows the light curve in UBV filters from JD 2446983 to 2447005,


                            [FIGURE 1]

                Figure 1   Primary minimum of V1488 Cyg



                           A. DOLZAN
                           Zasavska 88
                           61231 Ljubljana
                           Yugoslavia



References:
Bohme, D., 1987, I.B.V.S. No. 3083
Hall, D.S., Genet, R.M., 1982, Photoelectric Photometry of Variable Stars,
       I.A.P.P.P. [BIBCODE 1982ppvs.book.....H ]
SAC 58, 1986 Cracow
Schroeder, K.P., 1987, BAV Rundbrief 36, 61