COMMISSION 27 AND 42 OF THE IAU
                   INFORMATION BULLETIN ON VARIABLE STARS
                               Number 3814

                                                         Konkoly Observatory
                                                         Budapest
                                                         27 November 1992

                                                         HU ISSN 0374 - 0676


               TWELVE NEW OR UNDESIGNATED VARIABLES

A continuing photographic patrol has resulted in the discovery of 12 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; Kazarovets and Samus 1990). Five of these
stars are listed 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 (1991).
   David B. Williams has examined DHK 25-28 and 30-36 on the Harvard patrol
plates and confirmed variability within the stated photographic magnitude
ranges. These observations will be published when analysis is completed.
I have used the Harvard plates to find the period of the new eclipsing binary
DHK 29 (Kaiser and Baldwin 1992).
   I am grateful to Dr. Martha Hazen, curator of astronomical photographs at
Harvard College Observatory, for use of the Harvard patrol plates. I would
also like to thank Marvin E. Baldwin and David B. Williams for helping to
confirm the variability of these stars. The variables were detected using a
projection blink comparator (PROBLICOM) as described by Mayer (1977).


                                      TABLE I.

Var. Designation      RA (1950)    Dec (1950)     Range      Type   P (days)

DHK 25 = NSV 1040     03h03m39s    +60d17.8'   11.4-12.1 pg   SR     350:
         BD +59d594
         IRC +60111

DHK 26 = NSV 5949     12 45 23     +34 40.0    11.9-12.8 pg   SR     300:

DHK 27 = BD +38d780   03 37 24     +38 50.4    10.5-11.4 pg   Lb     Irreg.
         HD 275647
         SAO 56620

DHK 28 = BD +26d4660  23 33 37     +27 24.6    10.6-11.3 pg   SR     150:
         SAO 91369

DHK 29 = BD +33d4070  20 51 10     +33 55.7     8.9- 9.5 V    EA     1.9021
         SAO 70629

DHK 30 = GSC          05 22 29     +29 35.8    11.1-11.8 pg   SR     250:
         1859:0163

DHK 31 = BD +32d996   05 25 36     +32 26.3     9.6-10.1 pg   SR:     70:
         HD 35816
         SAO 58083

DHK 32 = GSC          05 25 33     +32 23.1    11.1-11.7 pg   SR      80:
         2407:0390

DHK 33 = GSC          05 35 22     -01 39.2    12.1-13.0 pg   Ib:    Irreg.
         4767:0829

DHK 34 = NSV 3288     06 53 43     +14 23.0    11.1-12.2 pg   SR     130:

DHK 35 = NSV 13854    21 40 30     +54 36.0    11.1-12.2 pg   Ib:    Irreg.
         BD +54d2603
         HD 206695
         IRC +50393

DHK 36 = NSV 13889    21 47 23     +12 28.7    10.7-11.2 pg   SR:     60:
         BD +12"4694


Note: In the absence of other catalogue designations, variables are identified
by their Guide Star Catalogue numbers (Space Telescope Science Institute,
Baltimore, 1989, CD-ROM). In these cases, finding charts will be published
with the analysis of observations.


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



References:

Kaiser, D.H.: 1991, Inform. Bull. Var. Stars No. 3677.
Kaiser, D.H., and Baldwin, M.E.: 1992, Inform. Bull. Var. Stars No. 3815.
Kazarovets, E.V., and Samus, N.N.: 1990, Inform. Bull. Var. Stars No. 3530.
Kholopov, P.N., editor, et al.: 1982, New Catalogue of Suspected Variable
     Stars, Moscow.
Kholopov, P. N., editor, et al.: 1985, General Catalogue of Variable Stars,
     Moscow.
Kholopov, P.N., Samus, N.N., Kazarovets, E.V., and Perova, N.B.: 1985,
     Inform. Bull. Var. Stars No. 2681.
Kholopov, P.N., Samus, N.N., Kazarovets, E.V., and Kireeva, N.N.: 1987,
     Inform. Bull. Var. Stars No. 3058.
Kholopov, P.N., Samus, N.N., Kazarovets, E.V., Frolov, M.S., and Kireeva, N.N.:
     1989, Inform. Bull. Var. Stars No. 3323.
Mayer, B.: 1977, Sky and Tel., 54, 246.