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arXiv 1607.03517astro-ph.EP
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飞行任务可探测近地天体巡天(MANOS):第一次光度测量结果

The Mission Accessible Near-Earth Objects Survey (MANOS): first photometric results

A. Thirouin, N. Moskovitz, R. P. Binzel, E. Christensen, F. E. DeMeo, M. J. Person, D. Polishook, C. A. Thomas, D. Trilling, M. Willman, M. Hinkle, B. Burt, D. … 展开作者

A. Thirouin, N. Moskovitz, R. P. Binzel, E. Christensen, F. E. DeMeo, M. J. Person, D. Polishook, C. A. Thomas, D. Trilling, M. Willman, M. Hinkle, B. Burt, D. Avner, F. J. Aceituno

摘要:

可探测近地天体巡天飞行任务旨在对千米以下近地天体进行物理表征。我们报告了2013年8月开始的调查的第一个测光结果。使用世界各地的1米至4米级望远镜进行了光度观测。我们提供了86个千米以下近地天体的自转周期和光变曲线振幅,但在某些情况下只提供了下限。我们的主要目标是获得小型近地天体(通常为千米以下天体)的光变曲线,并估计其自转周期、光变曲线幅度和形状。这些特性用于统计研究,以确定近地天体总体特性。弱相关性似乎表明,较小的物体比较大的物体更接近球形。我们还报告了7个经过充分定性(光变曲线和可见光谱)的近地天体,它们是未来人类或机器人飞行任务的最合适候选天体。可行的任务目标是具有充分特征的物体,其Delta_v(NHATS)<12 km s^-1,旋转周期P> 1 h。假设物体定性的速度与本文所报告的类似,则需要对大约1,230个近地物体进行定性,才能找到100个可行的飞行任务目标。

英文摘要:

The Mission Accessible Near-Earth Objects Survey (MANOS) aims to physically characterize sub-km Near-Earth Objects (NEOs). We report first photometric results from the survey which began in August, 2013. Photometric observations were performed using 1 m to 4 m class telescopes around the world. We present rotational periods and lightcurve amplitudes for 86 sub-km NEOs, though in some cases, only lower limits are provided. Our main goal is to obtain lightcurves for small NEOs (typically, sub-km objects) and estimate their rotational periods, lightcurve amplitudes, and shapes. These properties are used for statistical study to constrain overall properties of the NEO population. A weak correlation seems to indicate that smaller objects are more spherical than the larger ones. We also report 7 NEOs that are fully characterized (lightcurve and visible spectra) as the most suitable candidates for a future human or robotic mission. Viable mission targets are objects fully characterized, with a Delta_v(NHATS) <12 km s^-1, and a rotational period P>1h. Assuming a similar rate of object characterization as reported in this paper, approximately 1,230 NEOs need to be characterized in order to find 100 viable 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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