Positions of theoretical radiants predicted with the models of C/1979 Y1-stream for t_ev = 5 (plot a), 10 (b), 20 (c), 40 (d), and 80 kyr (e). Filaments F1 and F2 corresponding to the annual showers, as well as the transitory filaments TF, are plotted. The positions are shown in the Hammer projection of celestial sphere in the equatorial coordinates. The sinusoid-like curve is the ecliptic.