COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1852

                                    Konkoly Observatory
                                    Budapest
                                    1980 October 10

                                    HU ISSN 0374-0676




           ON THE VARIABILITY OF V1068 CYGNI



    In 1977 D. Hoffleit (I.B.V.S. No. 1282, 1977) published a
new value of the period of the eclipsing binary star V 1068 Cyg.
    Min = JD 2437876.1 + 42.68d . E            (1)
The star was estimated from the Moscow plates by S.Shugarov
(A.Ts., No. 949, 1977; No. 1094, 1979), who confirmed this period.
It was shown that the light elements derived by R. Weber (I.B.V.S.
No. 39, 1963) and given in the GCVS (Moscow, 1969) were not correct. 
However, about half of the minima published by Weber was
not consistent with the new period of 42.68d.
    We have estimated this star on the Odessa plates, spanning
1957-1977. Among 711 plates the star was found at minimum on 51,
some observations were obtained on two plates taken at the same
time in photographic and photovisual systems, respectively. In
the photographic system the star's light varied from 10.98mag to
12.06mag. 34 moments were found when the star was at minimum, 17
of these from two plates. Besides deep minima the decrease of
light by 0.3-0.5mag was observed, but the number of such estimations
is little.
    The dates of the observed minima and close maxima (M),
deviations (O-C) and epochs relative to elements (1), the system
of plates (pg, pgvis) and the observer's name (D-V.G.Derevyagin,
Ch-R.I.Chuprina) are given in Table I.
    There were 9 cases when the star had minimum light on
several plates taken on neighbouring nights (from 2 to 4). The
longest minimum was observed in October 1962 (JD 2437960, 961,
962, 963), and the decrease was seen on the plates of two cameras.
    Using Odessa observations and those published by other

authors as well as original observations by S.Shugarov kindly
presented to us, we tried to make a search for the period. No
other value of the period has been found. It seems to be necessary 
to carry out systematic observations of this system.
  Table I

          JD         O-C        E      System of  Observer
                                       plates
  M 2436080.403
         82.397     -1.2d     -42     pg   pgvis    Ch
         83.400     -0.2              pg            Ch
         84.437     +0.9              pg            Ch
        381.499     -0.8      -35     pg            Ch
        425.449     +0.4      -34          pgvis    Ch
        426.438     +1.4              pg   pgvis    Ch
  M     428.445
  M     465.365
        466.354     -1.4      -33     pg            Ch
        809.436     +0.3      -25     pg             D
        894.194     -0.3      -23          pgvis    Ch
      37193.397     +0.2      -16     pg   pgvis   Ch, D
  M     195.380
        492.511     +0.5      - 9          pgvis    Ch
        493.477     +1.5                   pgvis    Ch
           .501                       pg             D
  M     494.478
        578.277     +1.0      - 7     pg   pgvis   Ch, D
           .304                       pg             D
        960.265     -1.3      + 2     pg   pgvis   Ch, D
        961.271     -0.2              pg             D
        962.277     +0.8              pg   pgvis   Ch, D
           .304                       pg             D
        963.296     +1.8              pg   pgvis   D, Ch
  M     964.276
      39027.314     -1.2      +27     pg             D
           .346                       pg             D
         28.345     -0.2              pg             D
         29.328     +0.8              pg             D
        412.297     -0.3      +36     pg   pgvis     Ch
        414.428     +1.8              pg             Ch
  M     415.249
  M     709.484
        711.470     +0.4      +43     pg   pgvis     Ch
  M     713.468
      40478.360     -1.3      +61     pg   pgvis     Ch
        479.355     -0.2              pg   pgvis     Ch
        480.356     +0.8              pg   pgvis     Ch
      41162.483      0.0      +77     pg   pgvis     Ch
        163.472     +1.0              pg   pgvis     Ch
  M     544.404
        545.442     -1.2      +86     pg   pgvis     Ch
  M   42355.222
        357.229     -0.3      +105    pg   pgvis     Ch


                R.I. CHUPRINA and V.G. DEREVYAGIN
                The Odessa Astronomical Observatory
                Odessa, USSR