COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 1655

                                  Konkoly Observatory
                                  Budapest
                                  1979 August 3




             VARIABILITY OF CSV 6645



In the course of finding new variables in a field near Praesepe,
I detected the suspected variable CSV 6645 which is in the Second
Cat. of Susp. Var. Stars, 1965. The position of the star in the
catalogue is
       alpha = 8h32m22s, delta = +20d44' (1900.0)
The star was measured on 130 photographs taken between October
1977 and May 1979, with a camera of 50 cm focal length. Super
panchromatic emulsion was used with yellow-green filter, giving
the brightness very close to visual magnitude.
The star was discovered by R. Kippenhahn and was designated as
1.1954 Cnc. He described the type to be irregular and range to
be. 12.0m - 12.6m(p).
My observations are plotted in the Figure, and it shows the type
to be SR. The range is 10.4m - 11.7m(v) so far, and the large colour
index coincides with the type of the star. The variation was
fairly regular in 1977-78, but was less regular in the 1978-79 
observing season. The period is almost 100 days.
The finding chart of the star is given in Kippenhahn's paper.





                            M. HURUHATA
                      Hodozawa 88, Gotemba-shi.
                             412 Japan


Reference:
Kippenhahn, R., 1955 A.N., 282, 73 [BIBCODE 1955AN....282...73K ]


                         [FIGURE 1]