COMMISSION 27 OF THE I. A. U.
              INFORMATION BULLETIN ON VARIABLE STARS
                           Number 3126


                                           Konkoly Observatory
                                           Budapest
                                           29 December 1987

                                           HU ISSN 0374-0676


        OPTICAL BEHAVIOUR OF THE POLAR AM Her IN 1987

  In linking to the sequence of comparison stars given by Hudec and Meinunger 
(1977) the star was measured and inspected on 89 blue-sensitive plates
(ORWO-ZU 21+GG 13+BG 12) from 30 nights taken with the 50/70/172 cm Schmidt
camera of Sonneberg Observatory covering the time interval between 1 February
and 9 December 1987. The individual observations will be published in MVS,
Sonneberg.

  The annual light curve in B is given in Figure 1.
There, all of the observations are in the high state which is caused by X-ray
heating, The mean brightness amounts to B = 13.94 mag.



                            [FIGURE 1]
                            [FIGURE 2]


  Figure 2 shows the occultation light changes superimposed on the long-
time behaviour of the star in agreement with the improved elements and the
occultation light curve in B given by Gotz (1984).


                            W. GOTZ
                     Zentralinstitut fur Astrophysik
                     der Akademie der Wissenachaften
                     der DDR
                     Sternwarte Sonneberg





References:

Hudec, R., Meinunger, L., 1977, MVS 7, 194.
Gotz, W., 1984, IBVS, No. 2649.