COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2026

                                  Konkoly Observatory
                                  Budapest
                                  1981 October 15

                                  HU ISSN 0374-0676



        PHOTOELECTRIC MINIMA OF U PEGASI



  The short period eclipsing binary U Peg was photoelectrically 
observed during five nights on 1980 ( 17-21 September ).
The observations were made using the 48-inch Cassegrain reflector
at Kryonerion Astronomical Station and the two-beam, multi-mode,
nebular-stellar photometer of the National Observatory of Athens.
  Reduction of the observations was made using Hardie's (1962)
method while the B and V filters used are in close accordance
to the standard ones.
  From our observations three primary and two secondary minima
times have been derived and are given in the following Table,
the successive coloumns of which give : the heliocentric Julian
date, the residuals (O-C)_I, (O-C)_II and the type of
minimum.


                  T a b l e

---------------------------------------------
Hel. J.D.         (O-C)_I    (O-C)_II   Min
2444500.+          days       days      Type
---------------------------------------------
0.4922           -0.0280    -0.0152      I
1.4295           -0.0276    -0.0147      II
2.5554           -0.0261    -0.0132      II
3.4923           -0.0260    -0.0133      I
4.6165           -0.0263    -0.0134      I
---------------------------------------------

   The residuals (O-C)_I and (O-C)_II have been evaluated
according to

   Pr. Min = Hel. J.D. 2436511.66878+0.37478192d E
   (Kukarkin et al. 1969 or Rudnicki 1981)

and

   Pr. Min = Hel. J.D. 2436511.66856+0.37478133d E

   (Kukarkin et al. 1976)

respectively.
    The times of minima have been calculated using the Kwee
and Van Woerden method (1956) and are the mean values of B and
V observations.



H. ROVITHIS-LIVANIOU    P. ROVITHIS
Astronomy Department    National Observatory of
Athens University,      Athens, Athens (306)
Panepistimiopolis,      Greece.
Athens (621), Greece.



References:
Hardie, R.H.: 1962, in W.A. Hiltner (ed.), Stars and Stellar
         Systems Vol. II, Astronomical Techniques, The
         University of Chicago Press, Chicago.
Kukarkin, B.V. et. al: 1969, General Catalogue of Variable Stars,
         Moscow. [BIBCODE 1969gcvs.book.....K ]
Kukarkin, B.V. et al.: 1976, Third Supplement to the Third
         Edition of the General Catalogue of Variable Stars,
         Moscow. [BIBCODE 1976tstt.book.....K ]
Kwee, K.K., Van Woerden, H.: 1956, Bull. Astron. Inst. Neth.
         12, 327. [BIBCODE 1956BAN....12..327K ]
Rudnicki, Konrad: 1981, Rocznik Astronomy Observatorium
         Krakowskiego, Krakow.