COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                      Number 1192

                               Konkoly Observatory
                               Budapest
                               1976 October 25


      MINIMA AND PERIOD OF THE ECLIPSING BINARY VW PEGASI


    The star VW Peg was discovered by Williams (1914) who
found this star to be an Algol-system with the period P=5.26792d.
Maggini (1916) derived the elements:
         Min JD hel = 2420777.128d + 2.642758d E
but later observations did not confirm them. Zinner (1922) 
suggested that VW Peg is rather a Beta-Lyrae-system.
    VW Peg was observed at the Cracow Observatory and at
the island Hios (Greece) in the years 1930-1950. These observations 
were collected by Szafraniec (1962), but not elaborated
as yet.
    The list below contains four minima obtained by Williams
(1914), one minimum given by Maggini (1916) and four minima 
determined from Cracow Observations of Variable Stars (Szafraniec
1962). The columns contain: heliocentric time of minimum, (O-C)I,
(O-C)II, name of observer and references.




JD hel           (O-C)I      (O-C)II   Observer        References

2415729.459d     -0.006d     -0.007d   Williams      Williams (1914)
2416635.541      -0.008      -0.006    Williams      Williams (1914)
2417478.444      +0.031      +0.030    Williams      Williams (1914)
2417815.560       0.000       0.000    Williams      Williams (1914)
2420777.128      -0.171      -0.170    Maggini       Maggini (1916)
2426307.473      +0.032      +0.036  Kordylewski      this paper
2426307.475      +0.034      +0.038  Kordylewska      this paper
2426650.363      -0.077              Kordylewski      this paper
2428372.515      +0.051      +0.056  Kordylewski      this paper

   The values of (O-C)I were obtained according to the 
following elements:
        Min JD hel = 2417815.560d + 1.170648d E
and the values of (O-C)II were obtained according to the 
alternative elements:
        Min JD hel = 2417815.560d + 2.341295d E.
   In case of the latter elements the time of minimum
JD 2426650.363 refers to the secondary minimum and its (O-C)II =
= - 0.073d.


                              T. ZBIGNIEW DWORAK
                           Orla 171, 30-244 Karkow,
                                  Poland


References:

Maggini, M. 1916 Arcetri Pubbl., fasc. 34, 73
Szafraniec, R. 1962 Acta Astr. Suppl. 5, 651
Williams, A.S. 1914 MN 74, 215 [BIBCODE 1914MNRAS..74..215W ]
Zinner, E. 1922 Astr.Abh.Erghefte zu AN, Band 4, No. 3