COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 2027

                                  Konkoly Observatory
                                  Budapest
                                  1981 October 19

                                  HU ISSN 0374-0676





  THE MAXIMUM TIMES AND THE LIGHT ELEMENTS OF 28 ANDROMEDAE



  In the course of the intermediate and narrow band photometry
of some Delta Scuti type variables, 28 And was observed at Ege
University Observatory with the 48 cm Cassegrain reflector,
equipped with an unrefrigerated EMI 9781 A photomultiplier. The
star was observed on four nights, from December 28, 1979 to
February 10, 1980 and nine times of maxima were obtained.

  The times of maxima are given in the following table.


                  Table
         The maximum times of 28 And

  JD Hel.      O-C(I)     O-C(II)   E  Filter
---------------------------------------------
2444236.2530   0.0015d   -0.0029d   0   u
       .2520   0.0005    -0.0039    0   v 
       .2515   0.0000    -0.0044    0   b
       .2545   0.0030    -0.0014    0   y
    250.2595   0.0010    +0.0007  203   u
       .2655   0.0070    +0.0067  203   v
       .2630   0.0045    +0.0042  203   b
       .2660   0.0075    +0.0042  203   y
    280.2590  -0.0145    -0.0060  638   b


  For the determination of preliminary elements
JD Hel.2444 236.2515 was taken as a reference time and a period
of 0.069d given by Breger (1969) was adopted. The O-C(I) residuals 
were computed with the above given elements. The least
squares solution has been applied to these O-C(I) values and
cycle numbers (E), and new light elements were derived as
follows:

       Max. = JD Hel.2444 236.2559 + 0.0689797d. E
                              +-22        +-91


  Also the O-C(II) residuals were computed according to the
new light elements.
  The light curves and the results of the intermediate and
narrow band photometry of this star will be published 
elsewhere.





           Z. TUNCA, S. EVREN, C. IBANOGLU
           O. TUMER and A.Y. ERTAN

           Ege University Observatory
           Bornova, Izmir-Turkey





Reference:

Breger, M.: 1969, Astron.J. 74, 166. [BIBCODE 1969AJ.....74..166B ]