COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 1564

                               Konkoly Observatory
                               Budapest
                               1979 March 6




        PHOTOELECTRIC OBSERVATIONS OF DR Vul


    Photoelectric observations of DR Vul in U,B,V were carried
out at Kryonerion Station during July (18-24) 1976. The observations 
have been made using the two-beam, multi-mode, nebular-
stellar photometer (Goudis and Meaburn, 1973) attached to the
new 48-inch Cassegrain reflector of the National Observatory of
Athens (Contopoulos and Banos, 1976).
    The star BD +25d4105d or ADS 13397A (alpha_1950=20h05m8.69s;
   delta_1950=+26d02'8.0") of m_V = 8.5 was used as comparison. Reduction
of the observations has been based on Hardie's method (1962).
The standard error was found to be of the order of +-0.01m in
U,B,V.
    The following preliminary data for the primary minimum were
found:


  Hel.J.D.      (O-C)   m_V   B-V   U-B
----------------------------------------
2442982.4806   -0.0337d 9.27  0.20  0.52





PETER ROVITHIS           HELEN ROVITHIS-LIVANIOU
National Observatory     of Astronomy Dept., Athens University
Athens, Athens (306),    Panepistimiopolis, Athens (621)
Greece                   Greece



References:

1.  Contopoulos, G. and Banos, C.: Sky and Telescope,  51, 154, 1976 [BIBCODE 1976S&T....51..154C ]
2.  Goudis, C. and Meaburn, J.: Astroph. Space Sc., 20, 149, 1973 [BIBCODE 1973Ap&SS..20..149G ]
3.  Hardie, R.H.: Stars and Stellar Systems Vol. II, Astronomical
     Techniques, ed. Hiltner, W.A., The University of
     Chicago Press, Chicago, 1962
4. Kukarkin, B.V. et al.: General Cat. of Variable Stars, Moscow, 1969