COMMISSION 27 OF THE I. A. U.
             INFORMATION BULLETIN ON VARIABLE STARS
                         Number 3040


						Konkoly Observatory
						Budapest
						30 June 1987

						HU ISSN 0374-0676



            TIMES OF MINIMUM LIGHT FOR U CEPHEI IN 1986

  We present here three times of minimum light for U Cephei observed with
the 50-cm reflector of Hyogo University of Teacher Education in 1986, Observations
were performed with UBV filters and an uncooled 1P21 photomultiplier
tube. We determined the times of minimum using the bisection of chords method.


            TABLE I

PHOTOELECTRIC TIMES OF MINIMUM LIGHT IN 1986

JD(Hel)      E      O-C        d
-2440000           (days)   (days)

6496.1757   3291   0.0758   >0.063
6526.0905   3303   0.0741    0.086
6723.0434   3382   0.0767    0.095

  The results are listed in Table I. The first column gives the observed
times of minimum light. The second and third columns list cycle count and O-C
calculated with the ephemeris

   JD (Hel) min I = 2438291.5020 + 2.4930410d E

as Olson et al. (1985) did. The fourth column gives an estimate of the
apparent duration of totality. All these values are based upon the V data.
The third contact of the E = 3291 eclipse could not be observed due to a
temporary cloud. Therefore, we cannot judge whether or not the eclipse was
an undisturbed one according to the Crawford and Olson's (1979) criterion,
d >= 0.075 day. The other two eclipses were certainly undisturbed ones.


FUMIO SATO*
AKIHIRO NISHIMURA
Hyogo University of
  Teacher Education
Department of Science
  Education
Yashiro, Hyogo 673-14
Japan

*Present address
  Tokyo Gakugei University
  Department of Astronomy
  and Earth Science
  Koganei, Tokyo 184
  Japan


References:

Crawford, R.C. and Olson, E.C., 1979, Publ. Astron. Soc. Pacific 91, 413 [BIBCODE 1979PASP...91..413C ]
Olson, E.C., Hickey, J.P., Humes, L., and Paylor, V., 1985, 
  Inf. Bull. Var. Stars, No. 2707