COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 337


                             Konkoly Observatory
                             Budapest
                             1969 March 18


                Z CHAMAELEONTIS

Photoelectric observations of this U Geminorum
variable made with the 91-centimeter Cassegrain reflector
at Cerro Tololo Inter-American Observatory show it to be
an eclipsing binary.
Details  concerning the 8 observed minima are presented
below. Times of minima are best satisfied by the
light elements

        Min = JD 2440264.6826 + 0.074502d  E.


         Observations of Z Chamaeleontis

      Minima     E        O - C   Depth (1)  Depth (2)
  2440264.6826   0        0.0000   1.86        1.57
     0265.7259  14       +0.0003   2.11        1.97
     0265.8002  15       +0.0001   1.70        1.50
     0267.5880  39       -0.0002   1.93        1.47
     0269.6741  67       -0.0001   2.06        1.81
     0269.7488  68       +0.0001    --          --
     0272.5798 106        0.0000   1.74        1.32
     0274.7404 135        0.0000   1.73        1.36

   Light curves indicate that the entire eclipse lasts
some 7 minutes, with minimum being 2.5 to 3 minutes long.
In all cases, the descending branch of the light curves is
not as steep as the ascending one.
   The last two columns of the table give the mean
depth of minimum relative to the average brightness of the
system before and after eclipse, respectively, in blue
light. No value is given for eclipse 68 as the sky became
overcast shortly after this minimum had taken place.
   Further details on this interesting object will be
published elsewhere.


Medford, Massachusetts
March 10, 1969   

                          G.S. MUMFORD
                          Tufts University