COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 568

                                  Konkoly Observatory
                                  Budapest
                                  1971 July 15


                 V1057 CYGNI

      At the suggestion of Paris Pismis and George H.
Herbig, this unusual variable was observed on Harvard photographs 
taken earlier than 1934, thus extending the light
curve of W. Wenzel (1). At least one plate was examined for
each year back to 1889, and a single plate was also found
for 1885 that showed stars as faint as 11th-magnitude.
      From this material it seems certain that V1057 Cygni
never became as bright as it did during the sudden rise to
10th magnitude in 1969 (2,3). The faintest observable
images on the best Harvard plates were usually about photographic 
magnitude 12-13 previous to 1900, magnitude 13-14
thereafter.
      Only three definite images of V1057 Cygni were found,
all on plates taken with the 16-inch Metcalf refractor:
JD 2422923 (magnitude 16.3), 2423289 (16.3), and 2427603
(16.1). Hence, V1057 Cygni had about the same intensity as
early as 1921 as observed by Wenzel in later years.


                           L.J. ROBINSON
                           M. HARWOOD
                         Cambridge, Mass,
                             U.S.A.




(1) W. Wenzel, MVS, in press.
(2) G. Welin, Astr. and Ap, May 1971, 312, [BIBCODE 1971A&A....12..312W ]
(3) G.H. Herbig and E.A. Harlan, IBVS 543, 1971 [BIBCODE 1971IBVS..543....1H ]