On the 27th of November 2015, at 10:43:45.526 UTC, a fireball was observed across South Australia by ten Desert Fireball Network observatories lasting 6.1 s. A $\sim37$ kg meteoroid entered the atmosphere with a speed of 13.68$\pm0.09\,\mbox{km s}^{-1}$ and was observed ablating from a height of 85 km down to 18 km, having slowed to 3.28$\pm0.21 \,\mbox{km s}^{-1}$. Despite the relatively steep 68.5$^\circ$ trajectory, strong atmospheric winds significantly influenced the darkfight phase and the predicted fall line, but the analysis put the fall site in the centre of Kati Thanda - Lake Eyre South. Kati Thanda has metres-deep mud under its salt-encrusted surface. Reconnaissance of the area where the meteorite landed from a low flying aircraft revealed a 60 cm circular feature in the muddy lake, less than 50 m from the predicted fall line. After a short search, which again employed light aircraft, the meteorite was recovered on the 31st December 2015 from a depth of 42 cm. Murrili is the first recovered observed fall by the digital Desert Fireball Network (DFN). In addition to its scientific value, connecting composition to solar system context via orbital data, the recover demonstrates and validates the capabilities of the DFN, with its next generation remote observatories and automated data reduction pipeline.

中文翻译：

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Murrili 陨石的坠落和从 Kati Thanda 的恢复

2015 年 11 月 27 日，UTC 时间 10:43:45.526，十个沙漠火球网络天文台在南澳大利亚观测到一个持续 6.1 秒的火球。一颗 $\sim37$ kg 的流星体以 13.68$\pm0.09\,\mbox{km s}^{-1}$ 的速度进入大气层，并被观察到从 85 公里的高度下降到 18 公里，有减慢到 3.28$\pm0.21\,\mbox{km s}^{-1}$。尽管相对陡峭的 68.5$^\circ$ 轨迹，强大气风显着影响了暗战阶段和预测的坠落线，但分析将坠落地点置于 Kati Thanda 的中心 - 南艾尔湖。Kati Thanda 在其盐渍覆盖的表面下有数米深的泥浆。对陨石从低空飞行的飞机降落的区域进行的侦察发现，泥泞的湖中有一个 60 cm 的圆形特征，距离预测的坠落线不到 50 m。经过再次使用轻型飞机的短暂搜索，陨石于 2015 年 12 月 31 日从 42 厘米的深度被回收。Murrili 是数字沙漠火球网络 (DFN) 首次恢复观测到的坠落。除了它的科学价值，通过轨道数据将组成与太阳系背景联系起来，恢复展示并验证了 DFN 的能力，以及其下一代远程天文台和自动数据简化管道。