COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                   Number 2167

                                Konkoly Observatory
                                Budapest
                                1982 June 22

                                HU ISSN 0374-0676





                  "CEPHEID" EY Sgr NONVARIABLE?



  The G.C.V.S. lists EY Sgr as a classical Cepheid with m_p = 13.1m-14.2m
as given by Cannon (1925). No period is quoted. The coordinates given
(19h31m51s, -12d21.9'(1900)) are occupied by a pair of stars separated by
about 15". Figure 1 shows the two components (A = southeast, B = north-
west) in a tracing from the Palomar Sky Survey print (epoch 1950). The
nearest comparably bright object is about 1.1' away and is very unlikely
to be confused in position with EY Sgr. Each component of the double was
measured on numerous occasions in 1979-81 and proved constant to approximately
the percent level. Table I gives the final mean magnitudes and colors, the
standard deviation per observation, and the number of observations.


                       [FIGURE 1]


                      TABLE I


             EY Sgr-SE          EY Sgr-NW

V       12.604   0.012(13)   12.770   0.016(13)
B-V      0.918   0.011(13)    0.852   0.010(13)
V-R_C    0.543   0.011(10)    0.497   0.009(10)
V-I_C    1.060   0.017(9)     0.981   0.020(9)





           JOHN A.R. CALDWELL

           IAIN M. COULSON

           South African Astronomical Observatory
           P O Box 9 Observatory 7935
           Rep of South Africa





Reference:

Cannon, A. J., 1925, Harvard Bulletin 825.