COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 508


                             Konkoly Observatory
                             Budapest
                             1971 January 20




      PHOTOELECTRIC MINIMA OF ECLIPSING VARIABLES


      In the table are given minima of eclipsing binaries
obtained photoelectrically at the Bucarest Astronomical 
Observatory in 1970. The (O-C)-s were computed with elements
from the "Rocznik Astronomiczny 1969"



------------------------------------------------------
Obs. min.            E    O-C      n   Observer
J.D.hel
------------------------------------------------------
W UMa
    2440652.4104  12111 -0.0006d   37 Minti H.
44i Boo
    700.3943      12452 +0.0227
                                   23 Dumitrescu Al.
RX Her
    736.4415      4698   0.0000    29 Dumitrescu Al.
    777.3520      4721  -0.0009    16 Hinti H.
566 Oph
    820.3490      13609 +0.0005    24 Dumitrescu Al.
502 Oph
    719.4714      2381  -0.001     46 Minti H.
    778.4110      2511  -0.002     17 Dumitrescu Al.
U Oph +
    831.4001      11526 -0.0051    14 Dumitrescu Al.
    843.3929      11558 -0.0053    26 Dumitrescu Al.
836 Cyg
    836.3129      21868 -0.0009    31 Dumitrescu Al.
DR Vul
    845.3566      44170 +0.019     26 Ganea M.
AB And
    842.3655      14260 +0.0042    36 Dinescu R.
    846.3487      14772 +0.0047    46 Minti H.
    855.3094      14299 +0.0043    12 Dinescu R.
WW Aur
    885.4635     1700.5 -0.0027    33 Dumitrescu Al.
-----------------------------------------------------------

+ (O-C)-s were computed With the elements given by Binnendijk 
  (AJ 74, no. 2)





            MINIMA OF RR LYR TYPE STARS

----------------------------------------------------
Obs.max.         E       O-C     n    Observer
J.D.hel
--------------------------------------------------------
VZ Cnc
 2440822.3014  10086   +0.0069d  28   Dumitrescu Al.
     676.3384  10389   -0.0042   21   Dinescu R.
     677.4203  10395   +0.0076   18   Minti H.
     686.3272  10445   -0.0037   19   Dinescu R.
     694.3473  10490   -0.0100   36   Dumitrescu Al.
                                      Dinescu R.
     890.5484  11590   -0.0092   51   Dumitrescu Al.

XZ Dra
     769.5196  3690    +0.0370   51   Minti H.
     844.3354  3847    +0.0370   42   Dinescu R.
     853.3875  3866    +0.0357   28   Minti H.

SZ Lyn
     664.4239  20858   +0.0092   21   Minti H.
-------------------------------------------------------

January 10. 1971



                          C. POPOVICI
                        Bucarest Observatory
                       Astrophysical Section