COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                        Number 951

                                     Konkoly Observatory
                                     Budapest
                                     1974 December 11


                 MINIMA OF ECLIPSING VARIABLES

   The list below contains photoelectric minima of eclipsing variables 
observed with the 60 cm reflector of the Bologna Observatory.
The heliocentric times of minima and mean errors were obtained by
the method of Kwee and Van Woerden. Linear elements in the 1969 General 
Catalogue of Variable Stars were used to compute the E and O-C
values. N denotes the number of single observations used in computing 
the time of minimum; the colour of the observations is reported
in the last column.
   The time of secondary minimum of AK Her at E = 7830.5 was 
obtained by fitting the observations of J.D. 2440090 (descending branch)
and J.D. 2440058 (ascending branch) and using the period given by
Purgathofer and Widorn (Mitt. Univ. Sternw. Wien, 12, 1964).

Star         J.D. hel   m.e.      N      E         O-C
           (2400000 +)

AS Cam     40626.5230  +-0d.0007   39   8526    -0d.0447      blue
           40626.5215     .0005    38   8526    -0.0462       yellow
           41007.3606     .0003    36   8748    -0.0459       blue
           41007.3594     .0003    36   8748    -0.0471       yellow

AZ Cam     40655.4791     .0005    29  10811    -0.0148       blue
           40655.4792     .0005    28  10811    -0.0147       yellow

AO Cas     40855.4016     .0007    78   2459    -0.0419       blue

AK Her     40058.4030     .0001    28   7830.5  -0.0088       yellow
           40354.5208     .0002    19   8533    -0.0123        "
           40381.4986     .0004    23   8597    -0.0121        "
           40407.4234     .0001    24   8658.5  -0.0111        "
           41124.4318     .0003    28  10359.5  -0.0167        "
           41126.5398     .0005    15  10364.5  -0.0164        "

DI Her     40363.5280     .0001    45   2386.5  +2.7795       blue

TX Her     40735.4714     .0001    68   5054    -0.0103       yellow
           41182.4508     .0003    24   5271    -0.0097       blue
           41182.4511     .0002    23   5271    -0.0094       yellow

V451 Oph   40422.4890     .0002    46   2848.5  -0.0053       yellow

ER Vul     40182.266      .001     15   6430    -0.089        yellow
           40183.3107  +-0.0005    27   6431.5  -0d.0917      yellow



   Istituto di Astronomia                  PIERLUIGI BATTISTINI
   Universita di Bologna                   ANGELO BONIFAZI
   Italia                                  ADRIANO GUARNIERI