COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                      NUMBER 593

                                Konkoly Observatory
                                Budapest
                                1971 November 12



            VARIABLE RADIO OBJECT 20.08.01


      The object's optical variability announced by
KUROTSCHKIN (IAU Circ. 2365) is confirmed on numerous
Sonneberg plates. The maximum of September - October 1971.
mentioned l.c. lasted at least until October 15. The object
was continuously active from 1930 to 1971.


Pronounced maxima:
1933      February   14.0m    orthochromatic plates
1936/37   winter     13.5              "
1957      March      13.3
1959      February   13.3
1962      January    13.2
1963      March      13.1
1965      April      13.1
1968      spring     13.3     double maximum
1968      December   13.0
1970      November   13.0
1971      October   ]13.0
Pronounced minima:
1933      January   [15.3     orthochromatic plates
1933      March      15.2             "
1966      February   15.4
1967      February  [15.4


      The apparent scarceness of the minima is caused by
the fact that they can only be ascertained on the 14-cm-
Triplet plates.
      For further details see forthcoming number of MVS.



1971 November 3


                           W. WENZEL
                Deutsche Akademie der Wissenschaften
                  Zentralinstitut fur Astrophysik
                       Sternwarte Sonneberg