COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 206

                                  Konkoly Observatory
                                  Budapest
                                  12 June 1967


                SUPERNOVA IN NGC 3389


Photographic magnitudes of the supernova discovered by A.D. Chuadze and
independently by M. Lovas were determined on plates taken with the 24"
Schmidt-telescope. A photographic scale in the vicinity of the galaxy was
produced by transferring the open cluster M67 to the field. All the
observations were made on ORWO-plates ZU 2 through a Schott-filter GG 13 (2mm).
For normal main-sequence stars our magnitudes (b) transform according to the
formula

B=b+0.14 (B-V).

to the international B system.

The mean error of the magnitudes in about +-0.15, mainly caused by background
differences between supernova and undisturbed field.

       U.T.     b               U.T.       b
       1967                     1967
March  8.1    13.^m65    April 10.8      15.^m90
       9.0    13.70            11.8      15.65
      12.0    14.10            30.9      16.20
      12.9    13.95:     May    7.9      16.20
      29.8    14.90            10.9      16.20
April  7.8    15.60:           11.9      16.30


University Observatory, Jena
                                                S. MARX
                                                W. PFAU