COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 609

                                      Konkoly Observatory
                                      Budapest
                                      1972 January 4


              BAV - Mitteilungen Nr. 21

               NEW ELEMENTS FOR WW CAM


Observations of WW Cam by BAV-members and observers in Switzerland during
1966-1971 show large O-C_1 against elements given by M. Huruhata and
S. Gaposchkin in Bulletin of the Harvard College Obs. No. 914 (1940):

Min = JD 2427114.762+2^d.27436 * E.

The observed 10 minima (s. Table) led to the new elements:

Min = JD 2439403.556+2^d.2743676 E.

Residuals are given in the Table as O-C_2. The starting point of
M. Huruhata's elements is badly represented (O-C_2=-0.386). Therefore, a
change of period is supposed and the new elements may be taken only as
instantaneous.

Time of min.  obs.   n     O-C_1     O-C_2
(JD 24....)

39 403.549:   Br     4    +0.420:   -0.007:
40 073.359/   Br     9    +0.431    +0.002
   288.289*   HP    14    +0.434    +0.004
   381.531*   KL     8    +0.427    -0.003
   422.468*   KL    13    +0.426    -0.005
   438.402*   KL     9    +0.439    +0.009
   804.568:   Br     9    +0.433:   +0.002:
   811.400    Br    11    +0.442    +0.010
   836.406    Br    12    +0.430    -0.002
41 267.388/   Br    13    +0.421    -0.012

Observers are Br=W. Braune, HP=H. Peter, KL=K. Locher. : = not sure, / =
secondary minimum, n is the number of individual estimates used for timing the
respective minimum. * = the observations are published in ORION No. 113, 114,
115 (1969).

A complete description of the observations shall be published in BAV-Rundbrief
No. 1/2 (1972).


W. BRAUNE
Berliner Arbeitsgemeinschaft fur
Veranderliche Sterne e.V. (BAV)
D 1000 Berlin 19, Reichsstrasse 95