COMMISSION 27 OF THE I.A.U.
               INFORMATION BULLETIN ON VARIABLE STARS
                            Number 1436

                                                      Konkoly Observatory
                                                      Budapest
                                                      1978 June 12


   12.15 MINUTE LIGHT  VARIATIONS IN PRZYBYLSKI'S STAR
                      HD101065

Light variations of amplitude 0.01 to 0.02 mag and period
12.15 minutes have been discovered in the magnetic Holmium
star, HD 101065.
   Observations have been made on 23/24 Apr, 09/10, 13/14,
14/15, and 15/16 May 1978 using the People's Photometer attached
to the 0.5 m telescope of the South African Astronomical Observatory
(SAAO). Figure 1 shows the observations made on 15/16 May 1978
through a Johnson B filter. Each point represents the extinction
corrected magnitude of HD 101065 computed from the sum of two
10 second integrations. The slow drift in mean light level is
due to change in sky transparency during the observing run.
   HD101066 was monitored as a comparison star for 15 minute
periods at the beginning and end of each observing run and
shows no variations. In addition, observations through a
Johnson U filter were obtained by Dr. Gary Wegner simultaneously
with the observations shown in figure 1 using the St. Andrews
Photometer attached to the SAAO 1 meter telescope. Those
U observations also show the 12.15 minute light variability.
   A program of monitoring this star photoelectrically is
presently in progress. Simultaneous light and radial velocity
observations are planned using the People's Photometer on the
SAAO 0.5 m telescope and the Speedometer on the 1.88 m SAAO
telescope.


                            D. W. KURTZ

                            Department of Astronomy
                            University of Cape Town


                    [FIGURE 1]

Figure 1 The light curve of HD101065 for 15/16 May 1978.
The abscissa is Julian Date - 2443644. The
ordinate is the magnitude in Johnson B with tick
marks every 0.01 mag. The light curve is
continuous from left to right and top to bottom
with .005 day overlap from box to box.