COMMISSION 27 OF THE I.A.U.
              INFORMATION BULLETIN ON VARIABLE STARS
                           Number 1288

                                                    Konkoly Observatory
                                                    Budapest
                                                    1977 June 6


        THREE NEWLY DISCOVERED VARIABLE Ap STARS

UBV photometric study of a number of Ap stars indicates
that three show variations. They were observed during a thirty
day period in June and July of 1976 at Kitt Peak National Observatory 
using the number three 41-cm telescope, and at Lowell 
Observatory with the 54-cm telescope. Each Ap star was observed
with two comparison stars for which a constant brightness ratio
was required to establish variation of the Ap star.
   Period cannot be established firmly for them because the
length of observing period was less than, or close to, the period 
of variation of the stars.

Star        DeltaV    DeltaB   DeltaU    Estimated Period

HD 89069     --       0.015m   0.04m           18. d
HD 191980   0.036m    0.038    0.047           21. d
HD 199180   0.039     0.038    0.045           26. d

   Figure 1 shows DeltaU for the difference BD +79d328 - HD 89069
assuming a period of 18 days. The observing period was too short
for an accurate determination of the period of HD 89069, if the
period is as long as it appears to be. Figure 2 shows DeltaV for the
difference HD 192425 - HD 191980 versus phase for an assumed
period of 21 days for HD 191980. That period is a rough estimate.
Figure 3 shows DeltaV for the difference HD 199480 - HD 199180 with
a period of 26 days for HD 199180. That period is nothing but
a guess, but the variation is obvious.
   Observations of these stars is continuing.


                    EDWARD W. BURKE, Jr.* and SUSAN LADY *

                      Dept. of Physics, King College
                           Bristol, TN 37620


* Visiting Astronomer, Kitt Peak National Observatory which is
  operated by the Association of Universities for Research in
  Astronomy, Inc. under contract with the U.S. Nat.Sci.Foundation.



                    [FIGURE 1]
                    [FIGURE 2]
                    [FIGURE 3]