COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 388

                                Konkoly Observatory
                                Budapest
                                1969 October 10


        THE MAGNETIC STAR 53 CAMELOPARDALIS

The study of high dispersion spectra (9.7 A/mm) of
the spectrum variable A2p star 53 Cam is in progress. The
magnetic variations have been studied by Babcock (1) and
Preston (2).
The photoelectric variations have been investigated
by Jarzebowski (3), Rakos (4) and Preston - Stepien (5):
phase relation between the light and magnetic variations
depends on wavelength.

                       [FIGURE 1]
                       [FIGURE 2]

The radial velocity measures do not follow a regular
curve and are shown in figure 1 and 2. (The elements are
those of Preston and Stepien (5)). Present velocities show
more positive values than those of Babcock (6) and Harper
(7). As for HD 125248 (8) these observations can be 
explained with an orbital motion about an unseen companion
but more observations both photoelectric and spectrographic
are needed. A similar conclusion is suggested by observations
in progress by Preston (private communication by A. I. Deutsch).
     Stratification effects are present as shown in
Figure 2. The line intensities and widths are variable.
The variations of Ti II are out of phase with those of Mg I
and II, Eu II and the K line of Ca II.

                       ROSANNA FARAGGIANA
                    Astronomical Observatory
                           Trieste

References
1) Babcock H. W., Stellar magnetic fields in stars and stellar
   systems 6, 228, 1960
2) Preston G. W., Ap.J. 157, 247, 1969 [BIBCODE 1969ApJ...157..247P ]
3) Jarzebowski T., Acta astronomica 10, 237, 1960 [BIBCODE 1960AcA....10..237J ]
4) Rakos K. D., Lowell Obs. Bull. 5, 227, 1962 [BIBCODE 1962LowOB...5..227R ]
5) Preston G. W. and Stepien K., Ap. J. 151, 583, 1968 [BIBCODE 1968ApJ...151..583P ]
8) Babcock H. W., Ap.J. Suppl. III, 141, 1958 [BIBCODE 1958ApJS....3..141B ]
7) Harper W. E., Dom. Astroph. Obs. Victoria 7, 1, 1937 [BIBCODE 1937PDAO....7....1H ]
8) Babcock H. W. Ap.J. 114, 1, 1951 [BIBCODE 1951ApJ...114....1B ]