H.F. Nurzoda,  M. Narziev, M.N. Latipov

Annotation:

This paper presents the results of radar observations of meteors conducted at the Hissar Astronomical Observatory in 1969–1970. Using the bearing-time reduction method, more than 6,500 individual meteoroid orbits were determined, providing a basis for analyzing their radiant distribution and orbital characteristics. The orbital characteristics of the recorded meteoroids were analyzed to identify and classify groups of meteoric matter in near-Earth space. As a result, 276 meteoroid groups distributed across both celestial hemispheres were identified. Of these, 86 groups were classified as meteor showers, a significant proportion of which are listed in the International Astronomical Union (IAU) database, confirming the reliability of the identification results. In addition to known meteor showers, 85 associations and 105 new groups were identified, which may be of interest for further investigation of the structure and origin of meteoroid complexes. Analysis of the distributions of orbital eccentricities, inclinations, and Tisserand parameter values showed that a substantial proportion of the investigated meteoroids are characterized by comet-like orbits. The observed patterns are generally consistent with the results of optical studies of meteoric matter. The analysis provided a statistically substantiated picture of the distribution of meteoroid groups and confirmed the effectiveness of radar observations for identifying meteor showers and associations. The results supplement existing knowledge of meteor showers and indicate the need for further investigation and independent confirmation of the nature of the newly identified groups.

Keywords: radar observations, meteor streams, meteor associations, meteor radiants, orbital elements, meteoroids.