We report a comprehensive analysis of the instrumentally observed meteorite fall Žďar nad Sazavou, which occurred in the Czech Republic on 9 December 2014 at 16:16:45-54 UT. The original meteoroid with an estimated initial mass of 150 kg entered the atmosphere with a speed of 21.89 km/s and began a luminous trajectory at an altitude of 98.06 km. At the maximum, it reached -15.26 absolute magnitude and terminated after an 9.16 s and 170.5 km long flight at an altitude of 24.71 km with a speed of 4.8 km/s. The average slope of the atmospheric trajectory to the Earth's surface was only 25.66°. Before its collision with Earth, the initial meteoroid orbited the Sun on a moderately eccentric orbit with perihelion near Venus orbit, aphelion in the outer main belt, and low inclination. During the atmospheric entry, the meteoroid severely fragmented at a very low dynamic pressure 0.016 MPa and further multiple fragmentations occurred at 1.4 - 2.5 MPa. Based on our analysis, so far three small meteorites classified as L3.9 ordinary chondrites totaling 87 g have been found almost exactly in the locations predicted for a given mass. Because of very high quality of photographic and radiometric records, taken by the dedicated instruments of the Czech part of the European Fireball Network, Žďar nad Sazavou belongs to the most reliably, accurately, and thoroughly described meteorite falls in history.

中文翻译：

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Žďár nad Sázavou 陨石坠落：火球轨迹、测光、动力学、碎裂、轨道和陨石回收

我们报告了对仪器观测到的陨石坠落 Žďar nad Sazavou 的综合分析，该坠落于 2014 年 12 月 9 日 16:16:45-54 UT 发生在捷克共和国。最初估计初始质量为 150 kg 的流星体以 21.89 公里/秒的速度进入大气层，并在 98.06 公里的高度开始发光轨迹。最大时达到-15.26绝对星等，并在24.71公里的高度以4.8公里/秒的速度飞行9.16秒和170.5公里后终止。大气轨迹到地球表面的平均坡度仅为 25.66°。在与地球碰撞之前，最初的流星体在一个中等偏心轨道上绕太阳运行，近日点靠近金星轨道，远日点在外主带，倾角低。在大气进入过程中，流星体在 0.016 MPa 的极低动态压力下严重破碎，并在 1.4 - 2.5 MPa 下发生了进一步的多次破碎。根据我们的分析，迄今为止，三颗被归类为 L3.9 普通球粒陨石的小陨石几乎完全在给定质量的预测位置中被发现，总重 87 克。由于欧洲火球网络捷克部分的专用仪器拍摄的摄影和辐射记录质量非常高，Žďar nad Sazavou 属于历史上最可靠、准确和彻底描述的陨石坠落。9 颗普通球粒陨石，总重 87 克，几乎正好位于给定质量的预测位置。由于欧洲火球网络捷克部分的专用仪器拍摄的摄影和辐射记录质量非常高，Žďar nad Sazavou 属于历史上最可靠、准确和彻底描述的陨石坠落。9 颗普通球粒陨石，总重 87 克，几乎正好位于给定质量的预测位置。由于欧洲火球网络捷克部分的专用仪器拍摄的摄影和辐射记录质量非常高，Žďar nad Sazavou 属于历史上最可靠、准确和彻底描述的陨石坠落。