Abstract

Radio-wave observations using FM broadcasting frequencies have been performed on the 2001 Leonids. The observations were designed so that only a long echo could be received. The following results were obtained. First, the peak activity of the 2001 Leonids was approximately 18h10m (UT) on November 18 and the solar longitude of this peak corresponded to |${236\rlap {.}{}^{\mathrm {\circ }}45}$| (J2000.0). Second, it is inferred that the peak activity of the 2001 Leonids (1699 and 1866 dust trails) contained meteoroids of a larger average size than those of the 1999 Leonids (1899 dust trail).

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