COMMISSION 27 OF THE I.A.U.
                 INFORMATION BULLETIN ON VARIABLE STARS
                             Number 3209

                                                         Konkoly Observatory
                                                         Budapest
                                                         27 June 1988

                                                         HU ISSN 0374 - 0676


                             EF PEGASI

Tsesevich et al, (1979) gave a report on this U Geminorum type object,
which is separated by only 5" from a 15.5 magnitude star.
   In order to search for further brightenings, I performed magnitude estimates 
on about 900 sky patrol plates covering the time interval 1928-1986.
Because of the low limiting magnitude of the plates, only the brightness
maxima, which are given in Table I could be observed (about 11.6m...12.0m, near
the brightness of the comparison star "c" in the paper of Tsesevich et al.).
The maximum at J.D. 243 6071 given there was published by Tsesevich et al.
(1979). As the maxima recur at rather regular intervals, they can be described 
with the following elements:

  Max = 2426335 + 162.5d E.

A similar cycle length was conjectured by Hoffmeister (1935).


          Table I

  J.D.         E     O-C

2426333        0     - 2d
   6987.88     4     + 2
2430547       26     -13
   5781       58     +21
   6071       60     -14
   7906-11    71     +36
   8680       76     - 5
   9672       82     +12
2445165      116     -20

   The separation of EF Peg from the 5" comparison is, of course, not possible
on our plates. Inspecting the figure on page 5 of the paper by Tsesevich et al,
(1979), one may suppose that EF Peg belongs to the SU UMa subclass of dwarf
novae. This question, however, could not be answered because brightness rises
and declines could not be followed up on Sonneberg plates.


                                H. GESSNER

                                Akademie der Wissenschaften der DDR
                                Zentralinstitut fur Astrophysik
                                Sternwarte Sonneberg



References:

Hoffmeister, C., 1935, Astron. Nachr. 255, 407. [BIBCODE 1935AN....255..401H ]
Tsesevich, V.P., Goranskij, V.P., Samus, N.N., Shugarov, S.Yu., 1979, Astron.
     Tsirk, No. 1043. [BIBCODE 1979ATsir1043....3T ]