COMMISSION 27 OF THE I. A. U.
                 INFORMATION BULLETIN ON VARIABLE STARS
                              Number 2470

                                                     Konkoly Observatory
                                                     Budapest
                                                     6 February 1984

                                                     HU ISSN 0374-0676


                        OUTBURST OF VY Aqr IN 1983




   Photometric observations of the outburst of VY Aqr in Nov.-Dec., 1983
were obtained in Japan favored by good weathers. The outburst was first
detected on Nov. by S. Fujino. The observers and the instruments are
as follows.

  M. Huruhata   (Gotemba)      18cm Schmidt. camera
  S. Fujino     (Hamamatsu)    31     "        " 
  M. Wakuda          "         f 400mm Camera
  T. Saito           "         21cm reflector


                              [FIGURE 1]

               Figure 1   m_pv light curve of VY Aqr in 1983


   All the observers used Tri X emulsion, and the yellow-green filter was
attached to get visual magnitude. The magnitudes of comparison stars were
determined photographically by the writer. The results are shown in the
following table.


U.T.          m_pv    Obs.      U.T.        m_pv     Obs.
Nov.25.37    [15      H      Dec. 4.39     11.3       W
    28.43     11.1    F           5.37     11.8       H
    30.37     11.2    H           6.39     11.7       S
Dec. 1.36     11.4    H           6.45     11.7       F
     1.43     11.0    S           7.41     11.8       H
     2.36     11.6    H           8.36     11.8       H
     2.40     11.3    F          10.37     12.1       H
     3.36     11.7    H          11.36     12.7       F
     3.40     11.2    W          12.36    [14.5       H
     4.37     11.8    H          13.37    [14.5       H 


   The results are plotted in Figure 1, in which the pre-outburst observation 
by J. Bortle on Nov. 27.04 is shown.  Thus the outburst is considered 
to have occurred between Nov. 27.0 and 28.4, and the brightness suddenly 
decreased on Dec. 11 like SS Cygni type stars.





              MASAAKI HURUHATA
              Tokyo Astronomical Observatory
              Mitaka, Tokyo, 181
              Japan





Reference :
Bortle, J., 1983, IAU Circular No. 3896 [BIBCODE 1983IAUC.3896....1M ]