The C1‐ungrouped carbonaceous chondrite Flensburg fell in Germany on September 12, 2019, in the daytime. We determined the atmospheric trajectory, velocity, and heliocentric orbit using one dedicated AllSky6 meteor camera and three casual video records of the bolide. It was found that the meteorite originated in the vicinity of the 5:2 resonance with Jupiter at heliocentric distance of 2.82 AU. When combined with the bolide energy reported by the United States government sensors (USGS), the preatmospheric diameter of the meteoroid was estimated to be 2–3 m and the mass to be 10,000–20,000 kg. The meteoroid fragmented heavily in the atmosphere at heights of 46–37 km, under dynamic pressures of 0.7–2 MPa. The recovery of just one meteorite suggests that only a very small part of the original mass reached the ground. The bolide velocity vector was compared with that reported by the USGS. There is good agreement in the radiant but the velocity value has been underestimated by the USGS by almost 1 km s⁻¹.

中文翻译：

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独特的碳质陨石弗伦斯堡的轨迹和轨道

C1未分组的碳质球粒陨石Flensburg于2019年9月12日在德国坠落。我们使用一台专用的AllSky6流星相机和三张有关该流星的偶然视频记录，确定了大气轨迹，速度和日心轨道。发现陨石起源于与木星在5：2共振附近，其日心距为2.82 AU。结合美国政府传感器（USGS）报告的硼化物能量，流星体的大气压前直径估计为2–3 m，质量为10,000–20,000 kg。流星体在0.7–2 MPa的动压下在46-37 km的高度大气中大量破碎。仅有一颗陨石的回收表明，只有一小部分原始物质到达了地面。将硼化物速度矢量与USGS报告的速度矢量进行了比较。在辐射方面有很好的一致性，但是USGS低估了速度值将近1 km s^-1。