COMMISSION 27 OF THE I. A. U.
             INFORMATION BULLETIN ON VARIABLE STARS
                            NUMBER 92


                                         Konkoly Observatory
                                         Budapest
                                         30 April 1965


                 A POSSIBLE MAJOR PERIOD CHANGE
                          IN V342 AQUILAE

      The eclipsing variable V342 Aquilae is the fainter component
of ADS 12259 = 0 SIGMA 370 (rho = 19.5", THETA = 14deg). It has a visual
range 9.0 - 12.5; D = 13h, d = 3h. A finder chart with step
sequence was published by Zessevich (1). Elements in the 1958
"General Catalogue of Variable Stars" are:

            J.D. min_hel = 2428023.550 + 3d.390842 E        (A)

      From observations in 1964, M. Baldwin (2) found a large residual
from (A). All minima known to the writers are collected below:

  J.D.         E_A    O - C_A   E_B     O - C_B    Obs'r.      Ref.

2,400,000+
28023.550        0    0d.000                         P          3
31343.180     +979    -0.004                         Z          1
34520.399     1916    -0.004                         S          4
34920.527     2034    +0.004                         S          5
34988.343     2054    +0.004                         S          5
35632.603     2244    +0.004      0    -0.d000       S          6
36073.427     2374    +0.018   +130    -0.000        S          7
38599.691    +3119    +0.105   +875    -0.000        B          2


 Observers: J. Piegza, V. Zessevich, R. Szafraniec, M. Baldwin


                          - 2 -

      It seems that in 1956 the period of V342 Aquilae lengthened
by about 10 seconds. Szafraniec first noted that the period
was variable, and an increasing period was mentioned in SAC 30,
104, 1959. At present, mid-eclipse is coming about 2.5 hours
later than predicted by (A).
      These new elements are based on the last three minima in
the table, and should be regarded as tentative (residuals are
indicated in column five).

          J.D. min_hel = 2435632.603 + 3d.3909574 E     (B).

The writers would like to receive unpublished or new 
observations of this star.


                          M. B. BALDWIN
                        2349 Travis Loop
                          Holloman AFB
                        New Mexico 88330


                          L. J. ROBINSON
                     41 Linnaean St., Apt #3
                      Cambridge, Mass. 02138



(1) V. Zessevich, Odessa Izvestia, IV. 80, 1954.
(2) M. Baldwin, unpublished observation sent to "Sky and Telescope's"
eclipsing variable star program.
(3) J. Piegza, the initial epoch in SAC 14, 56; see also AAc 2, 125,
which was unavailable to the writers.
(4) R. Szafraniec, SAC 25, 82.
(5) R. Szafraniec, AAc 5, 193.
(6) R. Szafraniec, SAC 28, 106.
(7) R. Szafraniec, SAC 29, 106.