五年多来NEOWISE调查数据中人工记录的299个近地天体的物理特性
Physical Properties of 299 NEOs Manually Recovered in Over Five Years of NEOWISE Survey Data
摘要：
对近地天体的热红外测量为限制其大小等物理特性提供了关键数据。NEOWISE任务一直在进行全天空红外线调查，以收集此类数据并增进我们对这一群体的了解。虽然采用自动化例程来识别NEOWISE检测到的大多数移动对象，但对象的一个子集将具有落在这些例程可检测的窗口之外的动态属性。利用已知的近地天体总数，我们进行了一次人工搜索，以探测到以前未报告的这些天体。我们报告了对299个独特近地天体的303个新时期的观测，其中239个从未从NEOWISE重新激活任务中获得过物理特性表征。由于这些对象是从具有固有光学选择偏差的列表中提取的，因此测量的径向分布的分布被偏斜到比由自动化例程检测到的直径选择的群体所看到的更高的值。这些结果证明了定期检索NEOWISE档案数据的重要性和益处。
英文摘要：
Thermal infrared measurements of near-Earth objects provide critical data for constraining their physical properties such as size. The NEOWISE mission has been conducting an all-sky infrared survey to gather such data and improve our understanding of this population. While automated routines are employed to identify the majority of moving objects detected by NEOWISE, a subset of objects will have dynamical properties that fall outside the window detectable to these routines. Using the population of known near-Earth objects, we have conducted a manual search for detections of these objects that were previously unreported. We report 303 new epochs of observations for 299 unique near-Earth objects of which 239 have no previous physical property characterization from the NEOWISE Reactivation mission. As these objects are drawn from a list with inherent optical selection biases, the distribution of measured albedos is skewed to higher values than is seen for the diameter-selected population detected by the automated routines. These results demonstrate the importance and benefit of periodic searches of the archival NEOWISE data.
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