云南西双版纳曼桂陨石雨调查

The survey of Mangui meteorite shower in the Xishuangbanna area, Yunnan Province, China

北京时间2018年6月1日21:43左右,在云南西双版纳景洪市的西南有火流星滑过夜空,通过目击者拍摄的视频初步判断又是一次陨石降落,这是继2017年10月4日(农历中秋节)后又一次目击到流星光顾云南省上空。6月2日有消息称在西双版纳勐海县勐遮镇的曼伦村发现了降落的陨石。随后的几天,陆续有很多媒体记者、陨石爱好者和陨石猎人赶往陨石降落地,随即,一场陨石雨呈现出来。截止目前,已经收集到的数据表明这次陨石雨的已知范围约3km×12km,从南东向北西方向以55.3°±2.5°的入射角度降落至地面,先后在曼南、曼光、曼央囡、曼潘、曼么代、曼楷龙、曼庄、曼垒、曼伦、曼迈回、曼朗、曼赛、蔓燕和曼桂村等10余个自然村发现陨石,据不完全统计,陨石数量超过1000个,质量由0.04 g至1280 g,总质量超过50 kg。该陨石雨陨石类型为L6,冲击程度为S4。

On June 1 st, 2018, at 21:43 Beijing Time(UT+8), a meteor bolide lightened sky and fell across the southwestern Jinghong Ciry, Xishuangbanna Prefecture in Yunnan Province. On the basis of videos taken by several witnesses in Jinghong City, we believe that it should be a meteorite landing event. It is another witnessed meteor bolide appeared in Yunnan province since the mid-autumn festival fireball incident in the Shangri-la area on 4 th of October 2017. On June 2 nd, it is said that a piece of fresh meteorite was found by some residents in the Manlun village, Mengzhe town, Menghai county, Xishuangbanna region. The news spreaded on the internet rapidly, and numerous meteorite collectors, dealers and news reporters flooded there. Many meteorites, found in following days, revealed that there was a big meteorite shower in the area. So far, the currently collected data indicate that this meteorite shower covers an area of about 3 km by 12 km According to our calculation, the meteorite fireball had falled at an angle of(55.3±2.5)° with respect to the horizon, in the direction from SE to NW. So far, the identified strewn field is 3 km×12 km Over 1000 individuals or fragments of meteorite, with weighted mass varying from 0.04 g to 1280 g, and total mass of over 50 kg, had been found in over 10 villages. The classification result shows that meteorites of the shower belong to the L6 type, with the shock intensity of S4.