COMMISSION 27 OF THE I.A.U.
               INFORMATION BULLETIN ON VARIABLE STARS
                            Number 1469

                                                      Konkoly Observatory
                                                      Budapest
                                                      1978 September 7


                         CD -30d5135

New photographic magnitude determinations have revealed brightness
variations of hitherto unknown amplitude in this interesting
emission-line F supergiant. The plates were taken by Dr. S.
Wramdemark with the Schmidt telescope of the Uppsala Southern
Station at Mount Stromlo Observatory, Australia, and the photometric 
calibration was made by the same means as in my previous
report on the star, IBVS No. 1313, 1977. The following magnitudes
were obtained (estimated error +0.1 mag.):


                    V       B      U

Jan. 11, 1978      8.75    9.9    10.7
Jan. 14, 1978      9.1    10.1    10.6

   When this is compared to the photometry by Humphreys (PASP 87,
933, 1975), it is seen that the amplitude of the light variations
is almost one magnitude in V, and that the star seems to become
redder as it brightens.
   It has been pointed out earlier (Welin, IBVS No. 1139, 1976)
that the star is not a spectroscopic binary, as was suggested by
Humphreys (op. cit.). There still remains, however, to relate
the brightness variations to variations in the emission and other
spectral features, as well as in radial velocity. Simultaneous
monitoring of the star by spectroscopic and photometric means for
some time seems highly desirable.


                        GUNNAR WELIN

                        Astronomiska Observatoriet
                        Box 515
                        S-751 20 Uppsala, Sweden