New peculiarities of cometary outburst activity

The results of investigations of visual light curves, brightness outburst activity and photometrical evolution of some comets are presented. The peculiarities of brightness outbursts distribution on heliocentric distance, of temporal variations of outburst activity, outbursts correlation with sudden changes of power law coefficient and outbursts relation with precision positions of comets are discussed.The new phenomena found by authors must be taken into account when a mechanism of the cometary outburst activity is developed.