COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 387


                                 Konkoly Observatory
                                 Budapest
                                 1969 October 6



 PERIODS FOR TWELVE NEW VARIABLE STARS IN SAGITTARIUS


     Periods have been determined for twelve new variable
stars in Sagittarius, listed in the Table. The variables
have been examined on Harvard and Nantucket plates by
the persons noted in the column headed "Obs." Two of the
stars are of special interest. The observations of Var. No. 5
cannot be represented by a constant period but are adequately
satisfied by the small additional secular term. The earliest
observation is for 1899, the latest, 1951. This star is a
member of the globular cluster, M28. The semi-regular star,
No. 12, shows two intervals of regularity separated by an
interval of seemingly random phases.

                      [FIGURE 1]

    Fig. 1: Observations of Var. 5 represented by Ep. + Phase =
	     1.729305d+2x10^-9  (J. D. - 28000)^2

No RA(1900)   Dec      Max   Min   Type   Per      J.D.     ep Sp
   18h       deg  '  
1  11m29s    -27 51.6  11.1  12.1  SRa    57.3d   36050     76 M2
2  14 02     -22 58.2  13.7 [15.0  EA     21.466  32473.23 463
3  15 09     -23 08.4  14.3  16.3: SRa   186      24400    70 M:
4  18 23     -22 21.3  14.0  15.5  SRa   112.5    32063    88 M
5  18 34     -24 55.8  15.4  16.6  RR   0.5782670 28022.400
6  18 47     -26 32.4  13.7 [14.5  M     189      33850    50 M8
7  18 50     -26 39.0  15.0 [16.0  M     262      27980    38 M:
8  18 56     -26 29.6  14.0  15.5  SR    117.5:   25775
9  19 58     -23 03.7  14.4  16.3  C      14.40   28022   611
10 20 59     -22 21.1  15.0 [16.0  M     281      26560    32
11 23 58     -25 38.0  14.0  15.0  RR   0.565429  33858.392
12 25 36     -26 22.8  14.1 [15.5  SRa   149     /26200        M2:
                                                 \36100

* Observers and computers are Linda Deery (observer for No. 5);
Hoffleit (observer for Nos. 1, 2, 3, 6, 7, 9, 10, 12 and computer
for Nos. 1, 2, 4-12); Joann Lawless (observer for No. 11);
Joyce Pasdoe (observer for No. 5); Zora Prochazka (observer
for Nos. 8, 11); Ethel Richardson (observer for Nos. 3, 8).

Notes:                                       
No. 5. Changing period: Max = 28022.400+P_0xE+4.10^-10 E^2
    6. Images affected by companion
   11. Large magnitude scatter from blended images
   12. The period represents all observations for J.D.
       2423500-27000, and J.D. 33000-40100, but with a 70 day
       shift of phase between the two groups. J.D. 2427000-
       33000 not well represented.




                         DORRIT HOFFLEIT
                     Maria Mitchell Observatory
                         Nantucket, Mass.