COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                        Number 3435

                                               Konkoly Observatory
	                                       Budapest
        	                               23 February 1990

                	                       HU ISSN 0374 - 0676


          PHOTOELECTRIC MINIMA OF ECLIPSING BINARIES

   Photoelectric observations of the eclipsing binaries 44i Boo, RZ Cas,
U Cep and U Sge have been made with the 0.5-m reflector at the Odessa 
Observatory for the purpose of determining times of minima for the period
studies. The comparison stars were GC 20111 for 44i Boo, GC 3075 for RZ
Cas, HD 6006 for U Cep and HD 180242 for U Sge.
   The moments of minima were determined by the chord bisection method
for 44i Boo, RZ Cas and by the mean light curve method for U Cep, U Sge.
   The heliocentric times of the observed minima in yellow filter are
given in Table I, along with the epoch number (E), the O-C values and the
number of estimates used for each minimum (n).

                         Table I
Star          Min HJD        E            O-C         	n

44i Boo   2447359.3920   28030          +0d0221      	10
              364.3469   28048.5        +0.0224      	20
              355.4180   28052.5        +0.0223      	14
              371.4438   28075          +0.0222 	14
              375.3270   28089.5        +0.0220 	15
              388.3163   28138          +0.0223 	19
              393.4050   28157          +0.0225 	33
RZ Cas        370.5336   25112          -0.0554 	19
              376.5099   25117          -0.0554 	22
              382.4868   25122          -0.0547 	26
              394.4394   25132          -0.0547 	25
U Cep         361.2810   15833          +0.8922 	26
              366.2650   15835          +0.8904 	28
U Sge         383.5632   8949           +0.0002 	27
              390.3250   8951           +0.0008 	29

The O-C values have been calculated from the ephemeris:

          44i Boo Min I HJD = 2439852.4903+ 0.2678159d E
          RZ Cas Min  I HJD = 2417355.4233+ 1.1952519d E

          U Cep  Min I HJD = 2407890.2957 + 2.4929005d E
          U Sge  Min I HJD = 2417130.4090 + 3.3806184d E


   I thank the Director and the staff of the Odessa Observatory for 
observing time and assistance.

                               L.P. SURKOVA
                         The Teachers Training College,
                            Chita 672045, USSR