We present the data of photoelectric photometric observations of BW Vul carried out for four nights during the period of 1982 ∼ 1984 . The light curves with asymmetric shape show a stillstand on the ascending branch at phase of ϕ ≈ 0.85 just before the maximum light, and also the ampitude and shape of light curves are changed from night to night. Using all the published data, a new ephemeris of maximum time is derived, in which the period of light variation is P = 0 d .20102977 and its increasing rate is 2.2 see/century.

ABSTRACT
Ⅰ. INTRODUCTION
Ⅱ. OBSERVATIONS
Ⅲ. LIGHT CURVES
Ⅳ. PERIOD OF LIGHT VARIATION
REFERENCES

• JUNG JAE HOON(Korean National Astronomical Observatory)
• LEE SEE-WOO(Department of Astronomy, Seoul National University)