COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 1591

                                Konkoly Observatory
                                Budapest
                                1979 April 27





      PHOTOELECTRIC PHOTOMETRY OF V711 TAURI DURING 1979


     Photoelectric observations of the double star V711 Tauri
(HR 1099) were made at Kutztown State College Observatory with the
f/14.5 46-cm Cassegrain reflector. An unrefrigerated EMI 6256-SA
photomultiplier (S-13 surface) was used in conjunction with a standard 
V filter. Transformation to standard V magnitude was accomplished 
using a value of epsilon = -0.04. The comparison star chosen was
10 Tauri, which has been used by most previous observers of V711
Tauri.
     Observations were made on 14 nights from February 2 to
March 19, 1979. Each is the mean of three individual readings.
Phases have been calculated using the ephemeris:

       Hel. JD 2442766.069 + 2.83782d E.

The observations are as follows:


------------------------------------------------------------------
Hel.J.D.      Phase     Deltam(V)   Hel.J.D.       Phase Deltam(V)
------------------------------------------------------------------
2443907.528   0.231       1.452  2443916.501       0.393   1.423
908.537       0.586       1.505      918.501       0.098   1.529
909.509       0.929       1.626      921.520       0.162   1.493
910.519       0.285       1.440      922.517       0.513   1.462
913.494       0.333       1.415      940.519       0.857   1.625
914.520       0.695       1.538      941.521       0.210   1.460
915.545       0.056       1.578      952.525       0.088   1.581
------------------------------------------------------------------



     The total amplitude appears to be about 0.20 mag., which
is somewhat larger than that reported by Landis et al. (1978)
for observations made during late 1976 and early 1977. The minimum 

                      [FIGURE 1]

of the light curve occurs at about 0.35 phase, and far epoch
1979.15 a value of Theta(min) = 0.85 is obtained. Thus direct migration 
of the wave minimum, as opposed to the retrograde motion
first suspected, is confirmed by this finding.



                          CARLSON R. CHAMBLISS
                          PETER J. DETTERLINE
                          Kutztown State College
                          Kutztown, PA USA


Reference:

Landis, H. J., Lovell, L. P., Hall, D. S., Henry, G. W., and
   Remer, T. R., 1978, Astron. J., vol. 83, p. 176 [BIBCODE 1978AJ.....83..176L ]