COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 314


                              Konkoly Observatory
                              Budapest
                              1968 November 16


      HD 128661, PROBABLY AN ECLIPSING VARIABLE


      In the course of a test on the variability of small
amplitude for more than 200 A-type stars with a 25 cm mirror
at Kottamia Observatory (UAR) in 1965 the star HD 128661 -
BD +36deg2509 was found to be probably an eclipsing variable.
The eclipse began at about JD 2438906,367. The end could not
be observed, the zenith distance being too large. The 
minimum occurred at about JD 2438906,455. The amplitude might
be at least 0.28 mag.; the duration of the eclipse was about
4h 20m. HD 129653 and HD 125642 were used as comparison             
stars. The mean error of one measuring is less than +/- 0.01m.
In the following night, JD 2438907,259 - JD 2438907,490,
HD 128661 showed no variations of light.

		     [FIGURE 1]

     Probable Eclipse of HD 128661

   Comparison of HD 128661 with HD 129653

JD 2438906,....                Delta m
          ,2736                -0.162m
          ,3128                -0.159
          ,3493                -0.162
          ,3927                -0.065
          ,4392                +0.098
          ,4413                +0.104
          ,4735                +0.080
          ,5045                -0.007
          ,5274                -0.098




German Academy of Sciences
Institut fur Sternphysik
Sternwarte Sonneberg


                        G. JACKISCH