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Published online by Cambridge University Press: 14 August 2015
The Geminids and Quadrantids belong to the most active annual meteor showers. The distinct difference between the orbit sizes of large and small meteoroids in these streams has been shown. From this, the estimated age of the streams greatly exceeds the time since their discovery in the XIX century (Geminids in 1862, Quadrantids in 1830) (Lovell 1954, Hindley 1972).