COMMISSIONS 27 AND 42 OF THE IAU
           INFORMATION BULLETIN ON VARIABLE STARS
                        Number 3864

                                            Konkoly Observatory
                                            Budapest
                                            2 April 1993

                                            HU ISSN 0374 - 0676


              BVR OBSERVATIONS AND NEW ELEMENTS
                  FOR THE CEPHEID FT Mon


Photoelectric observations of the Cepheid FT Mon were carried out in autumn
1987 and 1992.  The 60-cm reflector of Mt. Maidanak Observatory of the
Tashkent Astronomical Institute was used and 34 BVR measurements were obtained.

The observations are listed in Table I.  The estimated error of the individual
data is about +-.015 mag.  These observations together with other published
ones (Berdnikov, 1992; Eggen, 1969) allow to improve the period:
3.421740d+-0.000011d.  The new elements

  Max=JD hel 2448516.5+3.421740 x E

have been used for phase calculation in Table I and for plotting the light and
colour curves in Figure 1, where open circles indicate Eggen's observations.


                               [FIGURE 1]


                     Table 1
   JD Hel      Phase     V       B-V     V-R
   2400000+
   47082.5190  0.920   12.559   1.069   0.860
   47083.4796  0.201   12.576   0.981   0.934
   47084.4127  0.473   12.966   1.153   1.075
   47085.4589  0.779   13.210   1.197   1.100
   47087.4479  0.360   12.783   1.106   1.022
   47088.4431  0.651   13.101   1.196   1.096
   48858.4689  0.940   12.467   1.045   0.848
   48860.4806  0.527   13.016   1.252   1.033
   48862.4716  0.109   12.346   0.961   0.813
   48870.4487  0.441   12.930   1.154   1.039
   48872.4356  0.021   12.090   0.889   0.711
   48872.4911  0.038   12.162   0.837   -
   48874.4509  0.610   13.068   1.278   1.083
   48874.4674  0.615   13.057   1.298   1.053
   48875.4792  0.911   12.850   1.116   -
   48876.4710  0.201   12.555   1.023   0.935
   48877.4340  0.482   12.995   1.123   1.054
   48877.4770  0.495   12.995   1.217   1.078
   48879.4518  0.072   12.226   -       0.739
   48879.4723  0.078   12.242   0.915   0.779
   48880.4358  0.359   12.849   1.137   1.044
   48880.4577  0.366   12.869   1.101   1.053
   48881.4456  0.654   13.125   1.223   1.096
   48882.4492  0.948   12.376   0.901   0.841
   48883.4439  0.238   12.653   1.018   1.013
   48883.4874  0.251   12.658   1.110   -
   48885.4358  0.821   13.161   1.216   1.066
   48885.4936  0.838   13.115   1.322   1.013
   48886.4314  0.112   12.354   0.931   0.861
   48888.4341  0.697   13.167   1.226   1.103
   48890.4272  0.279   12.707   1.102   0.984
   48890.4921  0.298   12.731   1.103   0.988
   48891.4237  0.571   13.077   1.235   1.057
   48891.4956  0.592   13.059   1.253   1.082

It is a pleasure to thank Dr.  V.  S.  Shevchenko for the observing time
necessary to carry out the present observations.



L. N. BERDNIKOV
Sternberg State Astronomical
Institute, Moscow, Russia
University of Saratov,
Saratov, Russia

References:
Berdnikov, L. N., 1992, Sov. Astr. Lett., 18, 325
Eggen, O. J., 1969, Astrophys. J., 156, 617 [BIBCODE 1969ApJ...156..617E ]