COMMISSION 27 OF THE I. A. U.
            INFORMATION BULLETIN ON VARIABLE STARS
                        Number 2822

                                          Konkoly Observatory
                                          Budapest
                                          21 November 1985

                                          HU ISSN 0374 - 0676



            PHOTOMETRY OF THE G8V STAR HD192020



During an observing run devoted to Wolf-Rayet stars, the G8V star
HD192020 was used as a comparison. The observational conditions
are described in our previous paper (I.B.V.S., No. 2821).


                          [FIGURE 1]

  Fig. 1. Variations of HD192020 as a function of the
  heliocentric Julian Date. The comparison stars are
  HD192536 and HD192537.



Comparison with the two constant stars HD192536 and HD192537
revealed a clear continuous variation. The range of amplitude in
the three filters used is of about .02 magn. A period (if the
variations are periodic ) cannot be established, of course, but
it could be of about 10 to 20 days. A shorter alias close to 1 
day seems to be ruled out despite the noise in our data.
No indication on the origin of those variations can be given.
Further investigations, photometrically and spectroscopically are
clearly needed.
Fig. 1 shows the variation of m_4060 as a function of the
heliocentric Julian date. The data are HD192020 - 1/2 (HD192536 +
HD192537) smoothed with a time scale of 30 minutes.






                            J.M. VREUX
                            J. MANFROID

                            Institut d'Astrophysique
                            B-4200 Liege
                            BELGIUM.