2012年7月13日在西班牙上空观测到的达摩克类星体的超级火流星分析
Analysis of a superbolide from a Damocloid observed over Spain on July 13, 2012
摘要：
2012年7月13日，西班牙中部和南部上空出现了一颗估计绝对星等为-20+-1的超级火流星。许多偶然的观察者目睹了这一非同寻常的事件，并在西班牙流星网络进行的连续火球监测和流星光谱学活动的框架内进行了记录。因此，由于最佳的天气条件，火流星是从10个流星观测站拍摄的。在这里，我们提出了这个宏伟的事件的分析，这是我们的团队有史以来记录的最明亮的火球。得到了火流星的大气轨道和母流星体在太阳系中的轨道。本文还讨论了这种粒子烧蚀过程中产生的发射光谱。我们发现，流星体，这是以下的哈雷彗星轨道，在钠耗尽，并有一个数量级的拉伸强度高于相应的典型彗星材料。通过轨道分析工具，我们研究了这个粒子的可能母体，结果表明，祖先是一个达摩克类。还给出了假设的流星体残骸的撞击区域，并进行了陨石搜索，但没有发现。
英文摘要：
A superbolide with an estimated absolute magnitude of -20+-1 was seen on July 13, 2012 over the center and south of Spain. This extraordinary event, which was witnessed by numerous casual observers, was recorded in the framework of the continuous fireball monitoring and meteor spectroscopy campaign performed by the SPanish Meteor Network (SPMN). Thus, because of optimal weather conditions, the bolide was imaged from ten meteor observing stations. Here we present the analysis of this magnificent event, which is the brightest fireball ever recorded by our team. The atmospheric trajectory of the bolide and the orbit in the Solar System of the parent meteoroid were obtained. The emission spectrum produced during the ablation of this particle is also discussed. We found that the meteoroid, which was following a Halley Type Comet orbit, was depleted in Na and had a tensile strength one order of magnitude higher than that corresponding to typical cometary materials. By means of orbital analysis tools we have investigated the likely parent body of this particle and the results suggest that the progenitor is a damocloid. The impact area of the hypothetical remnants of the meteoroid is also given and a search for meteorites was performed, but none were found.
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