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arXiv 1406.6547astro-ph.EP
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与潜在危险小行星2007 LQ 19相关的明亮火球

Bright Fireballs Associated with the Potentially Hazardous Asteroid 2007LQ19

Jose M. Madiedo, Josep M. Trigo-Rodriguez, Jose L. Ortiz, Alberto J. Castro-Tirado, Jesus Cabrera-Caño

摘要:

我们在这里分析了2009年和2010年两颗大型流星体在大气层中烧蚀产生的两个非常明亮的火球。在西班牙火球网持续流星监测活动的框架内,在西班牙上空观测到了这些缓慢移动和深度穿透的事件。对其中一个火球的发射光谱图像进行分析,提供了关于其前身流星体化学性质的初步线索。这些粒子的轨道参数表明可能与最近确定的7月rho-Herculid流星体流有关。此外,还根据轨道相异度准则对该流可能的母体进行了考虑。这一轨道分析表明,流星体和PHA 2007 LQ 19在近8,000年的时间里都表现出类似的演变,这表明要么该近地天体是这些粒子的潜在母体,要么该近地天体和两个流星体在过去有共同的祖先。

英文摘要:

We analyze here two very bright fireballs produced by the ablation in the atmosphere of two large meteoroids in 2009 and 2010. These slow-moving and deep-penetrating events were observed over Spain in the framework of our Spanish Fireball Network continuous meteor monitoring campaign. The analysis of the emission spectrum imaged for one of these fireballs has provided the first clues about the chemical nature of the progenitor meteoroids. The orbital parameters of these particles suggests a likely association with the recently identified July rho-Herculid meteoroid stream. In addition, considerations about the likely parent body of this stream are also made on the basis of orbital dissimilarity criteria. This orbital analysis reveals that both meteoroids and PHA 2007LQ19 exhibit a similar evolution during a time period of almost 8,000 years, which suggests that either this NEO is the potential parent of these particles or that this NEO and both meteoroids had a common progenitor in the past.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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