COMMISSION 27 OF THE I. A. U.
              INFORMATION BULLETIN ON VARIABLE STARS
                            NUMBER 56

                                        Konkoly Observatory
                                        Budapest
                                        24 June 1964


                      PREDISCOVERY MAGNITUDES
                      OF THE SUPERNOVA IN UMa

     The brightness of the supernova found by M. Lovas at the
mountain station of the Konkoly Observatory was measured on our sky
patrol plates. These measurements cover the interval between the
Soviet and Hungarian observations (Inf. Bull. No. 50).

J.D. 2438 439.50   1964 Febr.   13   [14m.3 invisible
          440.57                14    14.3 suspicious ?
          446.57                20    13.2
          457.36        March    2    12.85
          463.47                 8    13.3
          465.52                10    13.1
          502.50         Apr.   16   [14.3 invisible

     The comparison sequence is the same as published in Inf. Bull.
No. 50.

                                           P. AHNERT
                                     Sonneberg Observatory



           THE ELEMENTS OF THE VARIABLE STAR 78.1933. Cnc

      The star is No. 1389 in the CSSV (Moscow 1951)= SVS 540 Cnc.
According to P. Koulikovsky (Per. Zv. 4. 295, 1934) the star is of Algol
type varying between 12.6 and 14.5 m_pg. On the basis of 53 brightness
estimates made by K. Kordylewski at the mountain station of the Konkoly 
Observatory by means of the 8" expedition telescope of the Cracow
University Observatory the Algol type was not confirmed.

      The observations show two quick rises of brightness. The
brightness was equal to that of the comparison star A (Acta Astr. Suppl.
1950. 1. ) at the moments:

          J.D. 243 8418d.4696       +-0d.0033;

          J.D. 243 8430. 4151       +-0d.0030.

      Moreover, from 448 observations covering the period 1936-
1950 (Kordylewski l. c.) and from 180 observations between 1955 and
1960 (made available to me by K. Kordylewski) I found that the star is
an RR Lyrae variable of type a.

      The elements are:

             Hel. Max.= J.D. 243 8418d.5002 + 0d.5431583.E
             M - m = 0d.0532
             A_vis = 12m.12- 13m.05

     No Blashko effect has been found.

Cracow, 8 June 1964
                                      J. M. KREINER
                             Astronomical Observatory of the
                                 Jagellonian University