COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 1994

                                  Konkoly Observatory
                                  Budapest
                                  1981 July 19

                                  HU ISSN 0374-0676


      PHOTOELECTRIC OBSERVATIONS OF BV DRACONIS


  The short period eclipsing binary BV Dra (SAO 166036)
has been observed during August and September 1980 as well
as during May 1981. The observations have been made using
the two-beam, multi-mode, nebular-stellar photometer of the
National Observatory of Athens attached to the 48-inch
Cassegrain reflector at Kryonerion Astronomical Station.                 
The B and V filters used are in close accordance to the
standard ones. From our observations four primary and six
secondary minima times have been derived and are represented


                   Table

Hel. J. D.   	   O-C        sigma       Type of
2444000+           days       days     	    Min.
473.4512          0.0127    +-0.0003   	    II
474.3267          0.0130    +-0.0002         I  
475.3781          0.0142    +-0.0003         I
476.4283          0.0142    +-0.0003         I
478.3529          0.0135    +-0.0003        II
480.2772          0.0124    +-0.0003         I
480.4531          0.0133    +-0.0004        II
500.4051          0.0125    +-0.0002        II
506.3578          0.0125    +-0.0002        II
752.4579          0.0168    +-0.0006        II

in the following Table. The successive columns give the 
heliocentric J.D., the residuals O-C, the mean errors sigma, and the
type of minimum.
    The times of minima and the mean errors have been
calculated by Kwee and Van Woerden's method (1956) and
are the mean values from B and V observations except
that at Hel. J.D. 2444480.2772 for which there are observations 
only in V. The ephemeris used is that of Kukarkin et
al. (1969).




    P. ROVITHIS                H. ROVITHIS-LIVANIOU

National Observatory of    Astronomy Dept, Athens University
Athens, Athens 306         Panepistimiopolis, Athens 621
    Greece                         Greece



References:

Kukarkin, B.V., et al.: 1969, Gen. Cat. of Var. Stars, Moscow. [BIBCODE 1969gcvs.book.....K ]
Kwee, K.K. and Van Woerden, H.: 1956, Bull. Astr. Inst. Neth.
      12, 327. [BIBCODE 1956BAN....12..327K ]