COMMISSION 27 OF THE I. A. U.
		INFORMATION BULLETIN ON VARIABLE STARS
			     NUMBER 804

						Konkoly Observatory
						Budapest
						1973 June 22


	NOTE ON THE PHOTOMETRIC HISTORY OF HBV 475



  The peculiar variable star V1329 Cygni (=HBV 475) was found
and its photometric behaviour studied on 22 plates taken at the
University of Oklahoma Observatory between 1950 and 1957. The 
instrument used was the 83 mm astrograph in combination with Kodak
103aO plates. The brightness of the variable was estimated on the
plates using the set of comparison stars as adopted by Kohutek
(I.B.V.S. 384, 1969).
  The results are given in the table below. The figure shows
three normal points formed from these data, two later single 
observations and magnitude estimates based on the Lick and Palomar
Sky Atlas prints, as given by Kohutek and Bossen (Ap Letters 6,
157). The figure indicates a relatively constant brightness of
the variable near 15.0 magn. for the period considered; this also
fits the observations by Arhipova and Mandel (I.B.V.S. No. 762, 1973).
Only the two estimates on Palomar prints differ to some extent.
  The indicated scatter may not be entirely due to observational
errors. There is a possibility of short term variations: on
JD 2433202, a definite change in the brightness is recorded, on two
plates exposed 17 minutes apart.


 JD        Mag.   JD        Mag.  JD       Mag.   JD       Mag.
 243...           243...          243...          243...
3179.583   15.4  3202.583  14.7  3503.681  15.9  3927.576  15.2
 179.694   15.3   205.558  14.8   533.658  14.9   949.554  15.0
 182.706   14.8   205.668  14.8   563.677  15.2  6110.687  15.3
 185.621   14.8   215.566  14.8   564.706  14.8   495.700  14.6
 200.573   14.8   239.564  14.9   585.590  14.8
 202.571   15.9   266.532  14.8   888.617  14.7



                           [FIGURE 1]

Oklahoma Measurements of HBV 475. Asterisks mean estimates on Sky Atlas
prints.



PHILLIP D. HICKS
University of 
Oklahoma
Norman,
Oklahoma.