论文标题
arpu kuilpu：外部主皮带的H5
Arpu Kuilpu: An H5 from the Outer Main Belt
论文作者
论文摘要
2019年6月1日，就在当地时代晚上7:30之前，沙漠火球网络在西澳大利亚州边界附近的南澳大利亚州发现了-9.3级火球。该事件是由六个火球观测者观察到的，持续了五秒钟。一个站几乎直接在轨迹下方，极大地限制了轨迹解决方案。该轨迹的向后数值积分表明，该对象起源于外部主带，半轴轴为2.75 au。还提取了一条光曲线，并表明人体在大气通道中几乎没有碎裂。与几名沙漠火球网络团队和其他志愿者进行了搜索活动。根据黑暗飞行模型，在预测的秋季区域内回收了一个42 g碎片。基于对短寿命放射性核素的测量，确认片段是新鲜的跌落。陨石Arpu Kuilpu已被归类为H5普通软骨。这标志着沙漠火球网络在澳大利亚恢复的第五个秋天，以及最小的流星（$ \ simeq 2 $ kg），可以生存下来，并被恢复为陨石。
On 1 June 2019, just before 7:30 PM local time, the Desert Fireball Network detected a -9.3 magnitude fireball over South Australia near the Western Australia border. The event was observed by six fireball observatories, and lasted for five seconds. One station was nearly directly underneath the trajectory, greatly constraining the trajectory solution. This trajectory's backward numerical integrations indicate that the object originated from the outer main belt with a semi-major axis of 2.75 au. A light curve was also extracted and showed that the body experienced very little fragmentation during its atmospheric passage. A search campaign was conducted with several Desert Fireball Network team members and other volunteers. One 42 g fragment was recovered within the predicted fall area based on the dark flight model. Based on measurements of short-lived radionuclides, the fragment was confirmed to be a fresh fall. The meteorite, Arpu Kuilpu, has been classified as an H5 ordinary chondrite. This marks the fifth fall recovered in Australia by the Desert Fireball Network, and the smallest meteoroid ($\simeq 2$ kg) to ever survive entry and be recovered as a meteorite.
