Optical observations of NEA 3200 Phaethon (1983 TB) during the 2017 apparition
Optical observations of NEA 3200 Phaethon (1983 TB) during the 2017 apparition
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DOI：
10.1051/0004-6361/201833593
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发表时间：
2018-09
影响因子：
6.5
通讯作者：
Myung-Jin Kim;Hee-Jae Lee;Sang-Min Lee;Dong-Heun Kim;F. Yoshida;P. Bartczak;G. Dudziński;Jintae Park;Young‐Jun Choi;H. Moon;H. Yim;Jin Choi;E. Choi;Joh-Na Yoon;A. Serebryanskiy;M. Krugov;I. Reva;K. Ergashev;O. Burkhonov;S. Ehgamberdiev;Y. Turayev;Zhong-Yi Lin;T. Arai;K. Ohtsuka;Takashi Ito;S. Urakawa;M. Ishiguro
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文献类型：
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作者：
Myung-Jin Kim;Hee-Jae Lee;Sang-Min Lee;Dong-Heun Kim;F. Yoshida;P. Bartczak;G. Dudziński;Jintae Park;Young‐Jun Choi;H. Moon;H. Yim;Jin Choi;E. Choi;Joh-Na Yoon;A. Serebryanskiy;M. Krugov;I. Reva;K. Ergashev;O. Burkhonov;S. Ehgamberdiev;Y. Turayev;Zhong-Yi Lin;T. Arai;K. Ohtsuka;Takashi Ito;S. Urakawa;M. Ishiguro
上下文。近地小行星3200 Phaethon （1983 TB）不仅从科学的角度来看是一个有吸引力的物体，而且因为JAXA的命运+目标。利用法厄同卫星地基观测数据，研究了其旋转光曲线和自旋特性。目标。我们的目标是利用通过光学观测获得的所有可用光曲线数据集以及我们从2017年幻影中获得的时间序列观测数据来完善Phaethon的光曲线和形状模型。方法。利用8台12米望远镜和1台光学成像仪，我们获得了Phaethon的光学光曲线，并推导了它的自旋参数。我们采用光曲线反演方法和SAGE算法推导出凸和非凸形状模型和极点方向。结果。我们分析了Phaethon的光学光曲线，得出了一个自转周期为3.6039 h，自转轴比为a∕b = 1.07。通过两种独立的方法确定了极向的黄道经度（λp）和纬度（βp）分别为（308°，- 52°）和（322°，- 40°）。基于SAGE方法，提出了一种具有凹性特征的非凸模型。
Context. The near-Earth asteroid 3200 Phaethon (1983 TB) is an attractive object not only from a scientific viewpoint but also because of JAXA’s DESTINY+ target. The rotational lightcurve and spin properties were investigated based on the data obtained in the ground-based observation campaign of Phaethon. Aims. We aim to refine the lightcurves and shape model of Phaethon using all available lightcurve datasets obtained via optical observation, as well as our time-series observation data from the 2017 apparition. Methods. Using eight 12-m telescopes and an optical imager, we acquired the optical lightcurves and derived the spin parameters of Phaethon. We applied the lightcurve inversion method and SAGE algorithm to deduce the convex and non-convex shape model and pole orientations. Results. We analysed the optical lightcurve of Phaethon and derived a synodic and a sidereal rotational periods of 3.6039 h, with an axis ratio of a∕b = 1.07. The ecliptic longitude (λp) and latitude (βp) of the pole orientation were determined as (308°, −52°) and (322°, −40°) via two independent methods. A non-convex model from the SAGE method, which exhibits a concavity feature, is also presented.