COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1341

                                   Konkoly Observatory
                                   Budapest
                                   1977 September 23



       o ANDROMDAE: RADIAL VELOCITIES AND PROBABLE
              LONG PERIOD VARIATIONS




   Referring to the I.B.V.S. No. 1296 (1977) by Harmanec et al.
and to their conclusions, we point out what follows:
   The probable period of 23 years obtained by us (Fracassini
et al., 1977) is not depending on the radial velocity values of
the years 1975, 1976. This fact is an obvious consequence of
Lafler and Kinman's (1965) method adopted by us. Indeed the 
radial velocity values of the years 1900-1976 give P = 23.51y,those
of the years 1900-1974 give P = 23.50y.
   The comparison of the radial velocities of the period 1975-
1976 January with those found in the literature since 1900, is
not possible because at our knowledge radial velocities of the
phase of the envelope ejection were never published. This is
shown by the figure and by the table III reported respectively
by Fracassini and Pasinetti (1975) and by Fracassini et al. (1977).
The only radial velocities of a shell phase are those by Slettebak 
(1954) obtained from observations made three-five years after
the envelope ejection. In particular, the radial velocities of
1949 are relative to a phase without Halpha emissions.
   The figure 1 reported by Harmanec et al. shows notable 
variations of radial velocities in the same night: about 20 km/sec
for the cores of the hydrogen lines and about 50 km/sec for
the Hgamma wings relative to the shell core. Analogous variations
were found by us on 1975 November 20, during five hours of 
observation as reported in the Figure.
   As to the differences between the absolute values of radial
velocities found by us and by Harmanec et al., our checks have
not shown any blunder. Therefore we agree with Harmanec et al.
that it would be necessary to know the results of other observers.

                     [FIGURE 1]

                        M. FRACASSINI and L.E. PASINETTI
                        Osservatorio Astronomico di Milano-Merate
                        Via Brera n. 28. 20121 MILANO, Italia





References:
Fracassini, M., Pasinetti, L.E. 1975 IAU I.B.V.S. No. 1044
Fracassini, M., Pasinetti, L.E. Pastori, L., 1977, Astrophys.
        Spa.Sci., 49, 145 [BIBCODE 1977Ap&SS..49..145F ]
Lafler, J., Kinman, T.D., 1965, Astrophys. J. Suppl., 100, 216 [BIBCODE 1965ApJS...11..216L ]
Slettebak, A., 1954, Astrophys. J., 119, 460 [BIBCODE 1954ApJ...119..460S ]