COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                        NUMBER 676

                                          Konkoly Observatory
                                          Budapest
                                          1972 May 17


          PHOTOELECTRIC OBSERVATIONS OF THE ECLIPSING VARIABLE 
                         Z VULPECULAE


Photoelectric observations of Z Vulpeculae in blue and yellow colours were
carried out with the 8-inch refractor at the Education Centre of Kanagawa
Prefecture (longitude=9h17m55.3s, latitude=+35deg21'23."2) during forty-eight
nights from July 8 to December 18, 1971. The photometer was furnished with a
1P21 photomultiplier tube and two colour filters (Schott BG12+GG13 for blue and
Schott GG41 for yellow). BD +25deg3802 was used as the comparison star
throughout the course of these observations. This comparison star was the same
one as previously used by Broglia (1964, Jd.Obs. 47, 100).

As the variable star and the comparison star have close positions and similar
colours, there is little concern about making any correction for differential
extinction. Thus, all the observations given in Delta m=m_var-m_comp are
individually plotted in the following figure.

Our observations cover the primary minimum once with the observed epoch JD
2441170.1053, which gives +0.0070d+-0.0014d (p.e.) for the O-C residual from
Dugan and Wright's ephemeris (1939, Princeton Contr. 19, 55).

The observations were made under the guidance of Prof. M. Kitamura of Tokyo
Astronomical Observatory, to whom we wish to express our hearty thanks.


HITOSHI OGATA and TSUYOSHY OUTI
Education Centre of Kanagawa Prefecture,
Japan.


                     [FIGURE 1]