L. Hric et al., ORBITAL PERIOD CHANGE DURING THE OUTBURST OF THE SYMBIOTIC BINARY V-1329 CYGNI, Astrophysics and space science, 201(1), 1993, pp. 107-112
Photographic photometry of the symbiotic nova V 1329 Cygni performed a
t the Skalnate Pleso Observatory in the years 1979-1991 is presented.
An observational proof of the 11d.4 orbital period increase caused by
the nova-like outburst around 1966 is given. New ephemeris valid after
the year 1971 is as follows: JD(min) = 2446784.862 + 963d.306 x E. Th
e arguments in favour of accretion powered outburst are given.