The decays D∗∗→D∗+π−→D0π+π− are used to measure the helicity angle, i.e. the angle between the two pions in the rest frame of the D∗. The decays of D1(2420)0, D∗2(2460)0, D(2550)0, D∗(2600), D(2750) were measured. The data were read from the plots in the papers and therefore for the D1(2420)0, D∗2(2460)0 the error bars are the size of the points in the plots.