COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS                              _
                     NUMBER 402


                          Konkoly Observatory
                          Budapest
                          1969 November 11


         V-OBSERVATIONS AND LIGHT ELEMENTS
                OF OMEGA Cen V78

      V photographic observations (Kodak 103aD + Shott 
filter) of the eclipsing binary V78 in Omega Centauri were
obtained at the Bosque Alegre Observatory with the 1.54 m
reflecting telescope. Magnitudes were measured with a Zeiss
iris-diaphragm photometer. They are in Woolley's system
(Woolley, 1963) which is based on Eggen's photoelectric sequence 
(Eggen, 1963),

                       [FIGURE 1]
      Figure 1. V-Observations of V78 in Omega Cen

      Three times of minimum were obtained. They were
derived from comparisons of individual observations at
primary minimum with a mean light curve. Older Bpg minima
(Sistero, 1968) and the three recently obtained are as
follows:

            Minima                    E           (O-C)
 
JD hel.	2429470.3099+-0.0067 m.e.   -6388        +0,009
   	2427895.4195+-0.0036        -5166        -0,001
        2427943.3090+-0.0015        -5125        -0,002
   	2427970.1714+-0.0037        -5102        -0.007
        2440055.6397+-0.0032        +5244        -0.001
        2440299.7790+-0.0099        +5453        -0,001
        2440395.5855+-0.0088        +6535        -0.001 
        2440409.5882+-0.0077        +5547        +0.004


A least squares solution gives the light elements:

Min = JD hel. 2433929.9724 + 1d16812901. E
 		 +-.00       +-000000    p.e.

The V-light curve (Fig. 1) is similar to the B already obtained; 
though, the V observations are not sufficient,
especially at maximum, as to derive orbital elements. As
Omega Cen is kept under observation we hope to cover the
entire cycle by the next observing season.


1969 November 3

                        R.F. SISTERO*
                        C.R. FOURCADE*
                        J.R. LABORDE

                 Cordoba Observatory and I.M.A.F. *
                     Laprida 854, Cordoba
                         Argentina




Reference:
Eggen, O., 1963, unpublished, results given in Woolley, 1963.
Sistero, R.F., 1968, I.B.V.S. Comm.27 I.A.U. No 316. [IBVS 316]
Woolley, R.v.d,R., 1963, Roy.Obs.Ann., No 2,