Named in honor of Giuseppe Martelli {1923–1994}, head of the Space and Plasma Physics Group at the University of Sussex from 1964 to 1986. Martelli pioneered the development and use of explosive accelerating techniques for the study of macroscopic hypervelocity impacts. His experimental and theoretical work constitutes a major contribution to the understanding of impact magnetization of ferromagnetic rocks, a problem particularly relevant to the origin of lunar magnetism. Over the years he has organized numerous series of experiments to study catastrophic fragmentation of free falling bodies, thereby providing experimental input to theories of asteroidal evolution and other impact phenomena of astrophysical interest. (M 14972) _ _.