COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS 
                     Number 1855

                                    Konkoly Observatory
                                    Budapest
                                    1980 October 15

                                    HU ISSN 0374-0676




        THE MAXIMUM TIMES AND NEW LIGHT ELEMENTS
                  OF 28 AQUILAE



  The Delta Scuti type variable 28 Aql has been observed at
Ege University Observatory from June 13, to July 15, 1980. The
observations were carried out with the 48 cm Cassegrain reflector
equipped with an unrefrigerated EMI 9781 A photomultiplier. The
intermediate band filters were used at the observations.
  The maximum times obtained during the observations are given
in the following table.
                            Table I
               The maximum times of 28 Aql
     JD Hel.   O-C (I)      O-C (II)   E     Filter
2444404.5209   -0d0112      -0d0125  -13       b
       .5271   -0.0050      -0.0063  -13       y
    405.4417   +0.0096      +0.0103  - 7       b
       .4404   +0.0083      +0.0090  - 7       y
    406.4821    0.0000      +0.0031    0       b
       .4807   -0.0014      +0.0017    0       y
    416.5018   -0.0303      -0.0046   67       b
       .5015   -0.0306      -0.0049   67       y
    421.4527   -0.0294      +0.0074  100       b
       .4436   -0.0385      -0.0017  100       y
    426.5305   -0.0516      -0.0034  134       b
       .5278   -0.0543      -0.0061  134       y
    427.4305   -0.0516      -0.0014  140       b
       .4285   -0.0536      -0.0034  140       y
    428.4778   -0.0543      -0.0017  147       b
       .4799   -0.0522      +0.0004  147       y
    429.3799   -0.0522      +0.0024  153       b
       .3847   -0.0474      +0.0072  153       y
    436.4139   -0.0682      +0.0022  200       b
       .4146   -0.0675      +0.0019  200       y

    For the preliminary elements JD Hel. 2444406.4821 and a
period of 0.150d were taken. The O-C(I) residuals were computed

with these elements. The least square solution has been applied
and the new light elements were derived as follows:
      Max. = JD Hel. 2444406.4790 + 0.149663d E.
                             +-21       +-17

The O-C(II) residuals were computed using these new light elements.
    The light curves and the variations of their amplitudes
will soon be published elsewhere.






                   A.Y. ERTAN, Z. TUNCA, O. TUMER,
                   S. EVREN, M. KURUTAC and C. IBANOGLU
                   Ege University Observatory
                   Bornova, Izmir - Turkey