COMMISSION 27 OF THE I. A. U.
      INFORMATION BULLETIN ON VARIABLE STARS
                   NUMBER 186


                                  Konkoly Observatory
                                  Budapest
                                  23 February 1967


         V 439 OPHIUCHI, A CEPHEID WITH SECONDARY PERIOD

  This variable star was observed since 1931 by Tsessevich
(1,2), Hoffmeister, Piotrovski (3), and Storch (4). Hoffmeister
classified the star as RRc. Storch determined the following correct
elements;

        Max = JD 2438942.915+1.893d E

  I estimated the variable on 117 Odessa sky patrol plates in
the interval J.D 2436378 - 2438964. All the observations were used
for improving the elements to

        Max = JD 2438942.859+ 1.892958d E
 
  My observations show a large scatter. The variable seems
to be similar to TU Cas. Therefore, I looked for a secondary period
or for a beat period which resulted from the combined effect of a
primary and a secondary period. The value of the beat period finally
adopted is:

      Pb = 2.441 Po = 4.62 days.

  However, photoelectric observations are needed for 
corroborating these results.


    Odessa Astronomical Observatory

                                         E. B. GUSEV

References:
1. V. P. Tsessevich AN 247, 5911
2. V. P. Tsessevich Izv.Odessa Astron. Observ. II, II, 116, 1952
3. S. Piotrovsky, Acta Astronomica Suppl. 5, 584, 1962
4. C. Storch PASP 78, 462, 210, 1966