Positions of predicted radiants in various models and radiants of real meteors. Panel a: positions in the models for the P–R-effect parameter β = 10⁻¹¹ and a series of evolutionary times, 10, 20, 40, and 80 kyr are shown. Panel b: positions in the models for the evolutionary time of 20 kyr and series of parameters β equal to 10⁻¹¹, 0.0001, 0.001, 0.003, 0.005, and 0.007 can be seen. Panel c: radiant positions of the meteors constituting the real shower, related to comet C/1975 T2, which was separated in six modifications from three catalogs, are shown. A given kind of symbol shows the positions of radiants in one modification.