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arXiv 2302.01165astro-ph.EP
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NEOROCKS项目:小型近地小行星的表面特性

NEOROCKS project: surface properties of small near-Earth asteroids

T. Hromakina, M. Birlan, M. A. Barucci, M. Fulchignoni, F. Colas, S. Fornasier, F. Merlin, A. Sonka, S. Anghel, G. Poggiali, I. Belskaya, D. Perna, E. Dotto, the NEOROCKS team

摘要:

我们介绍了观测方案的新成果,该方案是近地天体项目的一部分,旨在增进对近地天体物理特性的了解,以利于行星防御。在2021年6月至2022年4月期间,使用上普罗旺斯天文台(法国)的1.2米望远镜在约翰逊-瓦兰测光系统的BVRI滤波器中进行测光观测。我们获得了42个近地天体的新表面颜色。基于测量的颜色,我们将20个对象分类为S-复合体,9个为C-复合体,9个为X-复合体,2个为D-型,一个对象为V-型,还有一个对象未分类。对于所有观测到的天体,我们估计了它们的绝对星等和直径。将这些新的观测结果与NEOROCKS项目中先前获得的数据相结合,将我们的数据集扩展到93个对象。数据集中直径D<500米的大多数天体属于一组硅酸盐天体,这可能与观测偏差有关。基于MOID和$Δ$ V值,我们选择了14个可以由航天器访问的对象。值得注意的是,我们发现D型小行星(163014)2001 UA 5和A型小行星2017 SE 19作为可能的太空任务目标特别感兴趣。

英文摘要:

We present new results of the observing program which is a part of the NEOROCKS project aimed to improve knowledge on physical properties of near-Earth Objects (NEOs) for planetary defense. Photometric observations were performed using the 1.2m telescope at the Haute-Provence observatory (France) in the BVRI filters of the Johnson-Cousins photometric systems between June 2021 and April 2022. We obtained new surface colors for 42 NEOs. Based on the measured colors we classified 20 objects as S-complex, 9 as C-complex, 9 as X-complex, 2 as D-type, one object as V-type, and one object remained unclassified. For all the observed objects we estimated their absolute magnitudes and diameters. Combining these new observations with the previously acquired data within the NEOROCKS project extended our dataset to 93 objects. The majority of objects in the dataset with diameters D<500m belongs to a group of silicate bodies, which could be related to observational bias. Based on MOID and $Δ$V values we selected 14 objects that could be accessible by a spacecraft. Notably, we find D-type asteroid (163014) 2001 UA5 and A-type asteroid 2017 SE19 to be of particular interest as possible space mission targets.

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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