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

                    NUMBER 394

                             Konkoly Observatory
                             Budapest
                             1969 October 21


          MINIMA OF ECLIPSING VARIABLES

         Visual observations of the eclipsing binaries
U Cep, RZ Cas, ST Per, UX UMa, X Tri, Z Dra, U Sge and
RW Tri were carried out in July-October 1968. For the 
determination of moments of minima and studying variations of
their periods UX UMa and RW Tri were observed with  the
19-inch reflector, U Cep and RZ Cas with a binocular and
the rest of the stars with the 8-inch refractor. All the
observations were made at the astronomical station "Majaki"
of Odessa observatory with kind permission of Prof. V. P.
Tsessewich.

Star     J.D.hel  .   E     O-C     n   n_1   n_2   W   Observer
U Cep    2440....     
         086.4957   12519 +.3900d^1)26   16    10   2   Surkova
         096.4620   12919 +.3852    29   15    14   2      "
         111.4211   12925 +.3864    37   24    13   2      "
         116.4211   12927 +.3841    20   10    10   2      "
         121.3883   12929 +.3820    26   12    14   2      "
         151.3052   12941 +.3841    23   11    12   2      "

RZ Cas   084.3022   19016 -.0312^2) 25   13    12   2   Surkova
            .3049         -.0285    20    9    11   1   Skatova
         085.4978   19017 -.0309    12    5     7   1   Surkova
            .4965   19017 -.0322    15    5    10   1   Skatova
         097.4458   19027 -.0354    16    5    11   1   Surkova
         121.3564   19047 -.0298    15    8     7   1      "
         139.2878   19062 -.0272    15   10     5   2      "
         151.2418   19072 -.0257    14    5     9   2      "

ST Per   087.4986    3987 -.058^3)  19    9    10   1   Surkova
         095.4412    3990 -.060     35   21    14   2      "

UX UMa   112.2689   64936 -.0059^4) 13    2    11   1   Surkova
         114.2556   64946 -.0059     9    2     4   1      "
         123.2822   64992 -.0062     6    4     2   1      "
         151.2105   65134 -.0052    14    8     6   2      "
         152.1952   65139 -.0049    18    9     9   2      "
         153.1773   65144 -.0051    16    2    14   2      "

U Sge    081.4414    6789 +.0080^5) 28   13     9   2   Skatova
         098.3438    6794 +.0073    29   11    18   2      "
         125.3876    6802 +.0061    27   13    14   2      "
         135.5318    6805 +.0085    22   10    12   2      "

X Tri    084.5833   11599 +.0366^6) 22   13     9   1     Skatova
         085.5552   11600 +.0363    29   13     7   1      "
         086.5282   11601 +.0348    24   12    12   1      "
         121.5041   11637 +.0342    25   13    12   1      "
         123.4457   11639 +.0358    14   10     4   1      "

RW Tri   094.4713   20260 +.0018^7) 17    9     8   0,5   Skatova
         108.3849   20320 +.0024    16    9     7   1      "
         116.5003   20355 +.0019    16    8     8   1      "
         117.4277   20376 +.0017    15    6     9   0,5    "
         121.3699   20359 +.0019    18    9     9   1      "
         123.4565   20585 +.0016    16    9     7   1      "
         151.2829   20505 +.0020    19   11     8   1      "

Z Dra    088.965     5024 +.0226^8) 17    9     8   1     Skatova
         111.5781    5041 +.0278    22   12    10   1      "
         114.2881    5043 +.0230    19    9    10   1      "
         118.3607    5046 +.0232    24   12    12   1      "
         126.5032    5052 +.0211    22   12    10   1      "
         149.5804    5069 +.0219    25   14    11   1      "

n = total number of estimates of brightness; n_1 =
number of estimates in ascending branch; n_2 = number of
estimates in descending branch; W = weight of observation.

O-C calculated from the elements:
1. Min hel. JD = 2407890.2957 + 2.4929005d  E
2. Min hel. JD = 2417355.4233 + 1.1952519  E
3. Min hel. JD = 2479528.5897 + 2.6483488  E
4. Min hel. JD = 2427341.2221 + 0.196671379  E
5. Min hel. JD = 2417130.4151 + 3.3806184  E
6. Min hel. JD = 2428815.7484 + 0.9715382  E
7. Min hel. JD = 2435396.5142 + 0.231883283  E
8. Min hel. JD = 2433268.7074 + 1.3574376  E

The Urals University, Sverdlovsk


                   L. P. SURKOVA, N. V. SKATOVA