COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                   Number 2344

                                   Konkoly Observatory
                                   Budapest
                                   31 May 1983

                                   HU ISSN 0374-0676

              MINIMA OF W UMa STARS

  In 1982 photoelectric observations of several W UMa
stars were carried out in B and V with the double beam photometer 
at the 1.06m telescope of Hoher List Observatory. For
some of these objects no photoelectric light curves are 
published so far. A more detailed discussion of the new light
curves will be published elsewhere, but some details on the
light elements shall be given here. One third of the previously 
known periods of these objects are severely in error,
and subsequent observations for a refinement of the new light
elements will be useful. Some additional information on the
light elements of EX Del, V502 Her, and RT LMi can be found
in another recent issue of the IBVS (Hoffmann and Meinunger,
1983). As the light curve of V417 Aql was covered incompletely, 
the new period should be regarded as a first approach.
When no new period is given, the O-C's do not exceed a few
percent of the period, with exception of SS Com, and, to a
minor degree, V859 Cyg, V344 Lac, and BK Vul. The minima were
determined according to the Pogson and tracing paper methods.

-------------------------------------------
Object         JD Min.   Phase  Rev.Period
-------------------------------------------
 EP   And    2445221.583   II
                5224.610   I
V417  Aql    2445225.35    ?    0.3377d
 TU   Boo       5055.449   ?
                5055.612   ?
 WZ   Cep       4989.326   II
                4989.534   I
 SS   Com       5026.532   I
                5027.563   II
V700  Cyg       5163.4793  II   0.290626
                5207.5095  I
                5209.5435  I
V859 Cyg        5203.544   II
 EX   Del       5166.528   II   0.3309882
V502  Her       5081.423   I    0.3692768
 DF   Hya       5021.3400  II   0.3302005
                5021.5060  I
V344  Lac       5222.3680  II
                5222.5635  I
 XZ   Leo       5025.358   I
                5025.595   II
 CE   Leo       5044.5495  II
                5047.4325  I
 RT   LMi       4988.3555  II   0.3749180
                5002.4147  I
 NY   Lyr       5169.5100  I
 PY   Lyr       5119.418   I
V396  Mon       5022.476   II
V508  Oph       5078.5785  II
                5082.5430  I
 AW   Vir       5002.645   II
                5022.6450  I
BD-6d4068       5095.387   II   0.419757
 BK   Vul       5211.4060  II
-------------------------------------------




                 M. HOFFMANN

             Observatorium Hoher List
             5568 Daun / Eifel, BRD





References:
Hoffmann, M., Meinunger, L., 1983, Inf. Bull. Variable Stars No. 2343