COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                         Number 958

                                      Konkoly Observatory
                                      Budapest
                                      1975 January 17


       SEVENTEEN LONG PERIOD VARIABLES IN SAGITTARIUS

    Recent results obtained at the Maria Mitchell Observatory of
long period variables in Sagittarius are summarized in Table I. Most
of them are slightly revised periods of some previously published.
The observations in general span the years 1924 to 1974. Diagrams
(South at top) are given in Figure 1 for those of the stars for
which such charts had not previously been available.
    The first star, discovered in 1973 by Barbara Capron, proves
to be an unusual type (Figure 2). Semi-regular cycles reminiscent
of RV Tauri light curves are found, but with a double period on the
order of 4000 days. Variables 8 and 15, discovered by Harriet Dinerstein 
in 1973, are both typical Mira type stars. Observations of
V519 and V520 Sgr, updated by Josefa Manella, could not be adequately 
represented by a constant period, but are adequately represented
by parabolic corrections:

V519 Max=JD 35085+178d.25n+0.0046n^2
V520 Max=   34910+260n+0.051n^2

The initial Julian Dates given in the formulae are interpolated values. 
The dates given in the Table correspond to recent well observed 
maxima.
    The Semi-regular variable V1666 shows fairly well defined 
cycles from about JD 23600 to 33800 (Harvard plates). The later 
Nantucket plates, however, do not yield well defined cycles, partly
perhaps because of larger observational errors on plates of smaller
scale in a crowded star field.
    The students who ascertained the periods shown in the final
columns of the table are O.L., Olivia Lovelace; J.M., Josefa Manella
and P.O., Pamela Owensby.


                                     DORRIT HOFFLEIT
                                     Maria Mitchell Observatory
                                     Nantucket, Mass., U.S.A.


            Table I. Long Period Variables in Sagittarius.

No.  Desig.   R.A. (1900) Dec.  Max. Min. Type J.D.    Period      Ep.Comp.
      Sgr.   h  m  s   deg   '                       Old   New
                                                       d       d
1      -    18 11 39   -29 30.4 12.  15.               -  ~4000       D.H.
2    V508      13 00    25 53.3 13.5 16.5   M  41920 294    293.8  62 O.L.
3   V1289      14 36    31 11.7 13.0 15.5   M  36760  -     220    25 P.O.
4   V1599      14 52    30 28.2 11.4 14.5   SR 36090 138.8  138.5 131 P.O.
5    V517      21 34    26  0.0 13.0 17:    M  41120 280    281.5  65 J.M.
6    V519      21 49    26  0.1 13.2 17.0   SR 40080 177 178.25+Delta 154 J.M.
7    V518      21 50    26 21.2 14.0 16.3   SR 37845 160    159.5 114 J.M.
8      -       22 05    16 50.2 10.8 15.    M  37520  -     410    35 P.O.
9    V520      22 19    25 51.4 13.3 17.0   M  41135 263   260+Delta 70 J.M.
10  V1666      23 03    25  4.7 13.8 15.9   SR 36728 102:  102.4:     D.H.,J.M.
11   V933      24 30    31 12.5 11.5 16.1   M  36760 280.9  282    50 P.O.
12   V935      25 32    31 16.0 11.1 15.3   M  36060 239.0  240    59 P.O.
13  V1683      27 05    20 59.6 12.0 16.2   M  40080 216    216.5  84 P.O.,D.E.
14  IU         28 58    31 22.4 13.5 17.    M  41100 382:   268.9  84 J.M.
15     -       32 33    20 40.1 15:  16.5   M  39030  -     307    60 D.H.
16  V1702      33 05    20 48.5 13.3 15.2   SR 42250  95    101.5 180 J.M.
17  S4277      34 06    29 54.0 14.0 16.0   SR 41890  -     144.5  42 J.M.


                           [FIGURE 1]

Finder charts for variables for which charts have not previously been
published. The letters indicate Durchmusterung stars near the variables:

Var.   DM                    Var.   DM                 Var.  BD
1      a    CoD-29deg14764   8      q    BD-17deg5199    13  k  BD-20deg5178
2      b       -25   13005   8      e      -16   4888    14  m CoD-31   15696
5,6    c       -26   13175   9      f   CoD-25   13150   15  n  BD-20   5213
7      d       -26   13194   9      g      -25   13149   17  p CoD-30   15966
                            10      h      -25   13163


                           [FIGURE 2]

   Light curve of var No. 1. Means over 100 days: small dots average of 
   less than 10 individual observations, large from 10 to 70. Deep minima
   occur at semi-regular intervals of about 4000 days, with more shallow
   secondary minima unevenly spaced between the primary.