Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition
Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition
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NEA 162173 (1999 JU3) 2011-2012 年出现期间的光学观测
DOI：
10.1051/0004-6361/201220673
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发表时间：
2013
影响因子：
6.5
通讯作者：
Y. Byun
中科院分区：
文献类型：
--
作者：
M.J. Kim;Y. Choi;H. Moon;M. Ishiguro;S. Mottola;M. Kaplan;D. Kuroda;D. S. Warjurkar;J. Takahashi;Y. Byun
上下文近地小行星162173（1999 JU 3）是两次小行星取样返回飞行任务的潜在目标，这不仅是因为它可以接近，而且也是因为它是第一颗可用于探索飞行任务的C型小行星。在2011-2012年的显灵期间，研究了该物体的光曲相关物理特性。
目标。我们的目标是确认有用的JAXA的隼鸟2号使命的物理参数，如旋转周期，绝对星等和相位函数。我们的数据补充了以前的研究，没有涵盖低相位角。
方法.通过光学成像仪和1 - 2 m级望远镜，我们获得了不同相位角的光度数据。我们独立地导出了小行星的自转光变曲线和相位曲线。
结果我们分析了162173（1999 JU 3）的光变曲线，得出会合自转周期为7.625 ± 0.003 h，轴比a/B = 1.12。绝对星等HR = 18.69 ± 0.07等，相位斜率G = −0.09 ± 0.03也是根据2011 - 2012年的观测结果而得到的。这些物理性质与先前在2007 - 2008年显灵期间获得的结果非常一致。
Context. Near-Earth asteroid 162173 (1999 JU3) is a potential target of two asteroid sample return missions, not only because of its accessibility but also because of the first C-type asteroid for exploration missions. The lightcurve-related physical properties of this object were investigated during the 2011–2012 apparition.
Aims. We aim to confirm the physical parameters useful for JAXA’s Hayabusa 2 mission, such as rotational period, absolute magnitude, and phase function. Our data complement previous studies that did not cover low phase angles.
Methods. With optical imagers and 1−2 m class telescopes, we acquired the photometric data at different phase angles. We independently derived the rotational lightcurve and the phase curve of the asteroid.
Results. We have analyzed the lightcurve of 162173 (1999 JU3), and derived a synodic rotational period of 7.625 ± 0.003 h, the axis ratio a/b = 1.12. The absolute magnitude HR = 18.69 ± 0.07 mag and the phase slope of G = −0.09 ± 0.03 were also obtained based on the observations made during the 2011 − 2012 apparition. These physical properties are in good agreement with the previous results obtained during the 2007−2008 apparition.
来自 AKARI 和 Subaru Observations 的 Hayabusa-2 样本返回目标 162173 1999 JU3 的反照率、尺寸和表面特征
DOI：
--
发表时间：
2008
期刊：
PASJ SP2
影响因子：
--
作者：
Hasegawa;S.;Muller;T. G.;Kawakami;K.;Kasuga;T.;14ada;T.;Ita;Y.;Takato;N.;Terada;H.;Fuiiyoshi;T.;Abe;M.
通讯作者：
M.