COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                      Number 1132

                                 Konkoly Observatory
                                 Budapest
                                 1976 May 20


            LIGHT ELEMENTS OF HD 123732




       The eclipsing character of HD 123732 was discovered by Bond
(1970) on Curtiss-Schmidt prism-objective plates and confirmed
by y-photoelectric observations.
       We report in this Note the times of minimum and light 
elements obtained from 231 UBV observations secured at Bosque 
Alegre Station of Cordoba Observatory. They were made with the 60
inch telescope, of the Observatory through a UBV set of standard
filters and an RCA 1P21 multiplier refrigerated in a box containing 
dry ice. The observations show the system to be a W UMa star
with shallow and almost equal minima.
       We derived six times of minimum for each light curve in U,
B, and V. They are listed in Table I; the residuals (O-C) and
cycles are from the linear least squares ephemeris:
             P.M.=JD hel. 2442196.09732 + 0.39395129d E
                                   +-47         +-35
including two times of minimum computed from the y-observations
kindly supplied by Dr. Bond.

               Table I: Times of minimum of HD 123732

Min.   Color      JD hel.     W    Cycles    O-C
                 2440000+

 I      V        649.8352     2    -3925.0   -0.0032
II      V        650.0381     3    -3924.5   +0.0027
 I      V       2122.8225     3     -186.0   +0.0001
        B           .8194     3     -186.0   -0.0030
        U           .8211     3     -186.0   -0.0013
II      V       2195.5057     1       -1.5   -0.0007
        B           .5039     1       -1.5   -0.0025
        U           .4996     1       -1.5   -0.0068
 I      V       2195.7032     3       -1.0   -0.0001
        B           .7032     3       -1.0   -0.0001
        U           .7035     3       -1.0   +0.0002
 I      V       2196.4931     1       +1.0   +0.0018
        B           .4887     1       +1.0   -0.0026
        U           .4908     1       +1.0   -0.0005
II      V       2196.6855     2       +1.5   -0.0027
        B           .6861     2       +1.5   -0.0021
        U           .6879     2       +1.5   -0.0003
II      V       2221.5121     2      +64.5   +0.0049
        B           .5124     2      +64.5   +0.0052
        U           .5139     2      +64.5   +0.0067


Observatorio Astronomico         R.F. SISTERO
5000 Cordoba, Argentina          M.E. CASTORE DE SISTERO

Reference:
Bond, H.E. 1970, Pub.A.S.P., 82, 1065 [BIBCODE 1970PASP...82.1065B ]