COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                       Number 3677

                                               Konkoly Observatory
                                               Budapest
                                               4 November 1991

                                               HU ISSN 0374 - 0676


         EIGHT NEW OR UNDESIGNATED VARIABLE STARS


  A continuing photographic patrol has resulted in the discovery of eight
more variable stars that are not included in the General Catalogue of
Variable Stars (Kholopov et al. 1985) or the subsequent Name Lists of
Variable Stars (Kholopov et al. 1985, 1987, 1989). Four of these stars
are found in the New Catalogue of Suspected Variable Stars (Kholopov et al.
1982) and this report represents independent confirmation of their
variability. Positions and preliminary magnitude ranges, types, and
periods are given in Table I, which continues the list in Kaiser (1990).
Figure 1 is a finding chart for DHK 21. The other variables are found in
the common catalogues, as noted.

   All eight stars have been examined on the Harvard College Observatory
patrol plates by D. B. Williams, who has confirmed variability in each
case and provided most of the magnitude ranges, types, and periods listed
in Table I. In addition, M. E. Baldwin and D. Skillman have confirmed
the variability of DHK 17 by visual and photoelectric observations,
respectively. Detailed results for individual stars will be reported when
analysis of the observations is completed.

   Some of the information in this report was obtained from the SIMBAD
data retrieval system, database of the Strasbourg, France, Astronomical
Data Center, for which I wish to thank Joyce Rey-Watson of the
Harvard-Smithsonian Center for Astrophysics and Elizabeth Waagen of the
AAVSO staff. The variables were detected using a projection blink
comparator (PROBLICOM) as described by Mayer (1977).


                             [FIGURE 1]

    Figure 1. Finding chart for DHK 21, based on blue images.


                        Table I.

Var. designation      RA (1950)      Dec (1950)    Range (b)   Type  P(days)

DHK 17- BD+05 1606    07h 12m 59s    +05  08.0'     12-13.5    SR    356
        SAO 115161

DHK 18- NSV 4621      09  43  56     -05  48.0     10.4-11.9   Lb    -
        BD -05 2898
        HD 84617

DHK 19- BD +40 3449   18  38  22     +40  17.0      9.2-10.5   SR    60:
        HD 172740
        SAO 47682

DHK 20- NSV 12930     20  12  04     +16  51.7      9.8-11.2   SR:   90:
        BD +16 4199
        HD 192446

DHK 21                20  14  16     +46  45        11.4-12.3  SR    400:

DHK 22- BD +31 4024   20  15  11     +31  23.9      11.6-12.2  Lb:
        HD 332077
        SAO 69757

DHK 23- NSV 13178     20  34  43     +32  13        10.7-11.2  SR:   340:
        BD +31 4152

DHK 24- NSV 1737      04  47  45     +15  41.9      11.2-12.0  Lb:   -
        BD +15 691
        HD 30710



DANIEL H. KAISER
2631 Washington Street
Columbus, IN 47201 U.S.A.

References:

Kaiser, D.H.: 1990, I.B.V.S., No. 3480.
Kholopov, P.N., editor, et al.: 1982, New Catalogue of Suspected Variable
  Stars, Nauka, Moscow.
Kholopov, P.N., editor, et al.: 1985, General Catalogue of Variable Stars,
  Nauka, Moscow.
Kholopov, P.N., Samus, N.N., Kazarovets, E.V. and Perova, N.B.: 1985,
  I.B.V.S., No. 2681.
Kholopov, P.N., Samus, N.N., Kazarovets, E.V. and Kireeva, N.N.: 1987,
  I.B.V.S., No. 3058.
Kholopov, P.N., Samus, N.N., Kazarovets, E.V., Frolov, M.S. and Kireeva,
  N.N.: 1989, I.B.V.S., No. 3323.
Mayer, B.: 1977, Sky and Tel., 54, 246.