COMMISSION 27 OF THE I. A. U.
        	INFORMATION BULLETIN ON VARIABLE STARS
                	     NUMBER 825

                           	     Konkoly Observatory
	                             Budapest
	                             1973 September 7


      REVISED ELEMENTS OF ECLIPSING VARIABLES




WY Cancri
Min. = J.D. 2426 352.3895 + 0.82937122d E, sigma = +/- 0.0051d, n = 42.
These elements of GCVS 1969 are fully satisfactory from 1931 to
1973. The period given in SAC 44 (1973) must be diminished.

TY Delphini
Min.= J.D. 2428 020.400 + 1.1911204d E,  sigma = +/- 0.0060d, n = 48.
The period seems to be constant between 1935 and 1972. An increase
to about 1.191123d since 1960 is possible, but not guaranteed.

VX Lacertae
Mean elements: Min. = J.D. 2424 791.481 + 1.0744953d E, sigma = +/-0.0104d
Instant elements 1:          24 791.488 + 1.0744891d E, sigma = +/-0.0049d
  " 	    "    2:          32 479.477 + 1.0744991d E, sigma = +/-0.0041d
  "	    "    3:          40 750.971 + 1.0744881d E, sigma = +/-0.0028d
The elements have been derived from 73 minima from 1926 till 1973.
The period undergoes strong variations of nearly 1 second.

UV  LEONIS
Min. = J.D. 2425 574.302 + 0.60008516d E, sigma = +/-0.0047d, n = 295.
These elements satisfy all observations from 1928 till 1973. Instantaneous 
elements do not diminish the scattering visibility.

FL Lyrae
Min. = J.D. 2433 440.506 + 2.1781527d E, sigma = +/-0.0067d, n = 70.
Observations from 1950 to 1973.
n = number of available minima.


                             P. AHNERT
                             Sonneberg