COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1077

                                Konkoly Observatory
                                Budapest
                                1975 December 23


     VARIABLE STARS IN THE GLOBULAR CLUSTER NGC 5286




   NGC 5286 is a globular cluster of the southern hemisphere
whose coordinates are A.R.=13h43.0m; Dec.=-51d07'.
   During several years 31 plates in B (103a-O+GG 13) and 30
plates in V (103a-D+GG11) were taken with the 1.54 m telescope
of the Astrophysical Station of Bosque Alegre, Cordoba, Argentina.
   Eight variable stars had been discovered (C.R. Fourcade and
J.R. Laborde, 1966, "Atlas y Catalogo de Estrellas Variables en
Cumulos Globulares al Sur de -29d") to which 5 new ones have 
recently been added by the authors.
   In this paper 6 of these stars were studied in blue and their
periods were determined up to four exact decimals. All the variables 
are of RR Lyrae type and their light curves are shown in 
Figure 1.
   Simultaneously with the study of the variables, C.R. Fourcade,
J.R. Laborde and J.C. Arias, 1975 established a colour-magnitude
diagram of the globular cluster NGC 5286, which has not yet been
published.
   Figure 2 shows the mean magnitudes of the variables in both
B and V colours. As it was expected, all these variables are within
the RR Lyrae gap.
   Due to the morphological characteristics of the colour-magnitude 
diagram (diagram representative of Halo clusters) it is expected 
that NGC 5286 contains more variables than those discovered 
up to now. The authors will continue their search of variables
in this cluster.


Observatorio Astronomico de Cordoba   CARLOS RAUL FOURCADE
Laprida 854, Cordoba,                 JOSE RAUL LABORDE
                                      ANGEL A. PUCH
Argentina                             JOSE RAMON COLAZO
                                      JUAN CARLOS ARIAS


                       [FIGURE 1]
                       [FIGURE 2]