The light curve of this
nova-like star displays three types of variation: (1) Brightening of up to
three magnitudes associated with the ejection of hot gas from either or both
components of the close binary, (2) eclipses whose shapes vary from cycle to
cycle, (3) irregular and very rapid fluctions, called "flickering."
This flickering was observed visually on several nights in October, 1978, when
the star appeared to change brightness by up to 0.6 mag. in several seconds.