COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2309

                                  Konkoly Observatory
                                  Budapest
                                  8 April 1983

                                  HU ISSN 0374 - 0676



            1981-82 LIGHT CURVE OF II PEGASI


A recent note by Byrne et al. (1983) prompts us to make available our
1981 photometry of the interesting RS CVn binary II Pegasi.
II Peg was observed differentially on 19 nights between September 1981
and August 1982 with the 48-inch Newtonian at Cloudcroft Observatory. The
comparison star was BD + 28d4648, which is C-2 of Byrne et al. The nightly
means (which include from 1 to 10 individual differential magnitudes in V
of the UBV system) are listed in Table I.
Nightly means are plotted in the Figure, where phase is computed with
the ephemeris

              JD 2443030.24 + 6.724183d E.



                  Table I

Differential V photometry of II Pegasi in 1981-82
------------------------------------
JD(hel.)  DeltaV   JD(hel.)   DeltaV
2444000+           2445000+
------------------------------------
872.722   -1.803   120.929   -1.834
873.746   -1.927   121.955   -1.941
874.693   -2.016   153.935   -1.770
893.700   -1.955   158.911   -1.831
956.646   -1.931   160.939   -1.820
966.609   -1.869   167.915   -1.840
967.667   -1.932   168.925   -1.947
977.600   -1.818   187.764   -1.825
                   188.930   -1.940
                   191.925   -1.888
                   196.854   -1.953
------------------------------------

                           [FIGURE 1]

The first entry in Table I appeared discordant and is not plotted, although
the discrepancy might be a result of the light curve's rapid variability
rather than measurement error, since these observations span an interval of
almost one full year.




               GREGORY W. HENRY ^a

               Cloudcroft Observatory
               Cloudcroft, New Mexico 88317

Reference:

Byrne, P. B., Butler, C. J., Andrews, A. D., Rodono, M., Catalano, S.,
   Pazzani, V., Linsky, J. L., Bornman, P., and Haisch, B. M. 1983,
   I.B.V.S. No. 2258.

a) Now at McDonald Observatory, Fort Davis, Texas