COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 637

                                        Konkoly Observatory
                                        Budapest
                                        1972 March 3


                MINIMA OF ECLIPSING VARIABLES


The writer observed visually following minima of eclipsing variables in Fort
Skala Observatory near Cracow.

The heliocentric moments of minima and limits of errors were determined by
the tracing-paper method. "n" behind moments of minima denotes normal minima
and column "N" denotes number of observations. Column O-C was computed with
elements given in "Rocznik Astronomiczny Obserwatorium Krakowskiego 1972".
"In" denotes instrument (E - Expedition Refractor O=203 mm, f=227 cm, B -
binocular and A - naked eye).

Star      J.D.hel.      O-C         N       In   Remarks
         244 0000+

WZ And   1368.288    +-0.008d    -0.012d    10    E
TT Aur   1350.556 n    0.007     +0.020     16    E
SV Cam   1353.325      0.004     +0.004     18    E
         1357.482      0.005     +0.010     13    E
S  Cnc   1357.421      0.005     +0.033     14    E
RZ Cas   1353.645      0.002     -0.009     19    B
ZZ Cas   1357.530 n    0.010     -0.005     17    E
AB Cas   1365.367      0.004     +0.028      8    E
 U Cep   1350.484      0.005     +0.018     16    E
ZZ Cep   1357.541      0.003     +0.004      9    E
 Z Dra   1353.613      0.002     -0.003     18    E
         1368.546      0.001     -0.002     11    E
RZ Dra   1365.348 n    0.003     -0.003     14    E
TW Dra   1357.520      0.003     +0.012     11    E
DE Hya   1367.470      0.015     +0.021      5    E
UV Leo   1367.350 n    0.005     +0.017     13    E
EW Lyr   1368.588      0.003     +0.045     10    E
Beta Lyr 1177.48  n    0.03      +0.08      15    A   primary
         1183.90  n    0.04                 17    A   secondary
U Oph    1368.638      0.005     -0.002      9    B
ET Ori   1353.424      0.004     +0.008     13    E
FR Ori   1368.366      0.003     +0.006      8    E
OS Ori   1353.437      0.003     +0.007     14    E
ST Per   1353.417      0.003     +0.014     17    E
XZ Per   1357.383      0.004     +0.007     11    E
Beta Per 0999.343 n    0.002     +0.011     22    A  moment was given with
                                                     error in IBVS 573
X Tri    1357.289      0.002     -0.021     10    E
XZ UMa   1351.299 n    0.008     -0.058      9    E


Cracow, February 1972

Z. KLIMEK
Astronomical Observatory of
the Jagiellonian University
Cracow