About 10 breakup events of the rocket bodies or satellites in Geostationary Earth Orbit (GEO) have been reported. However, only few events out of the 10 events have been confirmed so far. An effective way of confirming those events is to detect the debris fragments generated by the events for identifying with their origin objects. Japan Aerospace Exploration Agency (JAXA) carried out a two-year joint study with Kyushu University from Fiscal Year (FY) 2013. The optical observations were performed to detect un-catalogued debris at Bisei Space Guard Center (BSGC) owned by Japan Space Forum, using the data predicted by Kyushu University through their own prediction method. To identify the breakup event, changes of the orbits of the fragmentation debris by the breakup event were modeled and the distribution of the i-vector was calculated. In addition, the backward propagation of the detected debris orbit was performed. As a result, the breakup events were successfully identified by comparisons with the model. This paper presents and discusses the orbit modeling of the fragmentation debris in near GEO and the method and results of their origin identification.
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