COMMISSION 27 OF THE I. A. U.
        	INFORMATION BULLETIN ON VARIABLE STARS
                	    NUMBER 823

                        	         Konkoly Observatory
	                                 Budapest
        	                         1973 September 1


     A DELTA SCUTI COMPONENT IN THE BINARY SYSTEMS

              	Y CAMELOPARDALIS



B and V photometric observations of the eclipsing binary Y Cam
have been obtained with the 102-cm reflector of the Merate observatory 
from 1961 to 1970. The mean light curves display that, out of
the deepest part of the primary minimum, small brightness fluctuations 
lay upon the main light variation produced by the eclipse.
Therefore the warmer A7V component of the system seems to be a variable 
star. The total amplitude of the fluctuation can reach 0.04m,
as we can see from the figure where the arrow indicates the central
instant of the secondary minimum and it has a mean period of 0.063d.
However the plot of the single night runs displays that the 
amplitude of the fluctuation can reduce also to zero and that the 
period can also deviate by 0.01d around the mean value. The photometric 
behaviour and the spectral type give evidence that the principal
component of Y Cam is a Delta Scuti variable.
The detailed observations, a study of the variation of the orbital 
and Delta Scuti periods and a derivation of the elements will
be published elsewhere.


                        [FIGURE 1]


August 20, 1973         P. BROGLIA
                        Merate Observatory