GROUPS OF METEORITES AND METEORITE-DROPPING FIREBALLS IN ASTEROIDAL ORBITS

This paper presents the results of a study of the existence of nine near-Earth meteorite-producing groups in asteroidal orbits, containing sporadic fireballs from the IAU MDC-2007 database, sporadic meteors from the SonotaCo database, meteorites - namely, L5, L6 and H4-H6 ordinary chondrites and an ureilite, for which atmospheric and orbital parameters are known from instrumental observations. Orbits of the selected members of meteorite-producing groups were classified as asteroid orbits according to the Tisserand parameter T-j > 3.1. Dynamic links between the members of the identified meteorite-producing groups and instrumentally observed known meteorites which were taken as a reference for the search of potential group members were tested using orbital similarity criteria, in particular the Drummond criterion - D-D and the Southworth and Hawkins criterion - D-SH. As a result, several meteorite-dropping sporadic fireballs and small meteors, whose orbits are similar to the asteroid orbits of nine known meteorites, were detected and reckoned as possible members of meteorite-producing groups.