COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                      Number 1063

                                Konkoly Observatory
                                Budapest
                                1975 November 17



      TWO PECULIAR VARIABLE STARS: OX Cyg AND GR 128




    OX Cygni (Figure 1) was discovered by W. Baade in 1933 who
considered it as being a rapidly varying star of unknown type, 
varying between 15.6 and 16.2 pg. In the summer of 1973 Bonnie Buratti
rediscovered this star and made step estimates of its brightness on
about a thousand Nantucket plates. I have converted her estimates
into approximate magnitudes, re-checked all the extreme observations
and extended them to the more recent plates. From Figure 2 it appears
that rapid variations are superposed over a slow, long period variation, 
somewhat similar to the behaviour of several symbiotic stars.
We have been unsuccessful in finding a period for the rapid changes.

                      [FIGURE 1]

    Figure 1. Finder chart for OX Cyg. Star A is BD+39d3952.

    GR 128 in Coma Berenices, discovered in 1973 by Pinto and
Romano, has been examined at the request of Howard E. Bond, who
points out that the originally published position is in error and
gives the revised position as 11h59m36s +28d27.6" (1900). Figure 3
shows the Nantucket observations, covering the years 1964-1975.
The curve is taken from the Pinto-Romano paper. For the earlier
Nantucket observations the agreement is excellent; the later 
observations appear to be systematically about 0.5 mag. fainter than those
previously published. The star is close to the edge of the Nantucket
plates.

                         DORRIT HOFFLEIT
                       Maria Mitchell Observatory
                       Nantucket, Mass., U.S.A.


References:

Baade, W. 1933, A.N. 249, 269
Pinto, G. and Romano, R. 1973, Padova Pub. No. 164


                      [FIGURE 2]

  Figure 2. Nantucket observations of OX Cyg for 1920-1974.

                      [FIGURE 3]

  Figure 3. Nantucket observations of GR 128 compared with mean
  curve for Pinto-Romano observations.