COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                      NUMBER 527


                                Konkoly Observatory
                                Budapest
                                1971 February 27


            HD 197753: A NEW RED VARIABLE?

During the course of photoelectric photometry of
U Del it was discovered that HD 197753 (RA_1970= 20h43m45s,
D_1970=+18d8'), used as comparison star, was variable.
The light- and colour-curves have been constructed, using
BD+17d4365( RA_1970=20h35m15s, D_1970= +18d7') as 
comparison star (V=8.12, B-V= +1.16, U-B= +1.15). The range
of the light variation is about 0.15m. HD 197753 is possibly
an SR_b type variable.



--------------------------------------------------------------------------
         JD         DeltaV Delta(B-V)        JD          DeltaV Delta(B-V)
--------------------------------------------------------------------------
    2440769.525      -.375  .612         2440828.391      -.277  .579
        773.445      -.417  .615             829.337      -.293  .589
        777.530      -.402  .609             830.320      -.291  .602
        788.420      -.286  .600             836.324      -.349  .631
        792.384      -.265  .589             846.314      -.296  .616
        795.397      -.299  .602             849.308      -.299  .596
        812.358      -.424  .596             851.284      -.289  .599
        813.334      -.371  .596             853.289      -.300  .638
        815.311      -.398  .590             860.298      -.375  .607
        818.326      -.400  .592             864.303      -.339  .626
        822.334      -.362  .603             865.205      -.363  .618
        823.307      -.336  .599             874.290      -.320  .587
--------------------------------------------------------------------------



                          [FIGURE 1]


						M. WISSE

                                 Republic Observatory, Johannesburg