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Trajectory of HAYABUSA reentry determined from multisite TV observations

机译：根据多站点电视观测确定的HA矢折返轨迹

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摘要

The asteroid explorer HAYABUSA reentered into the Earth's atmosphere on 2010 June 13. We made simultaneous TV (television) observations at seven ground sites in order to calculate the trajectories of HAYABUSA and its sample return capsule (SRC), which both reentered into the atmosphere. Our TV observations showed that, after HAYABUSA reentered the atmosphere, the beginning time of its light emission on video was 13:51:57.4 UT at a height of 101.0±0.2 km. The end time was 13:52:42.0 UT at a height of 38.6±0.2 km. The initial velocity at the beginning was 12.1±0.3 kms1, and the entry angle was 9°. After identifying SRC as separated light emission independent of the mother spacecraft, we analyzed the trajectory of SRC from a height of 52.9 km to 35.7 km based on video images. The actual trajectory of the capsule, determined from the TV observations, was almost the same as the predicted trajectory in terms of the position, velocity, and time. We then calculated the fall spots of the SRC heat shields from the multisite TV observations.
机译：小行星探索者HAYABUSA于2010年6月13日重新进入了地球大气层。我们在七个地面站点同时进行了电视（电视）观测，以计算HAYABUSA及其样本返回舱（SRC）的轨迹，二者均重新进入了大气层。我们的电视观察结果显示，HAYABUSA重新进入大气后，其在视频上的发光开始时间为UT 13：51：57.4 UT，高度为101.0±0.2 km。结束时间为UT 13：52：42.0 UT，高度为38.6±0.2 km。开始时的初始速度为12.1±0.3 kms1，入射角为9°。在将SRC识别为独立于母飞船的分离光发射之后，我们根据视频图像分析了从52.9 km到35.7 km高度的SRC轨迹。根据电视观测确定的胶囊的实际轨迹，在位置，速度和时间方面几乎与预测的轨迹相同。然后，我们从多站点电视观测结果中计算出SRC隔热罩的下降点。

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