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Investigation of surface homogeneity of (3200) Phaethon

机译:(3200)Phaethon表面均匀性的研究

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Time-series multi-band photometry and spectrometry were performed in Nov.-Dec. 2017 to investigate the homogeneity of the surface of asteroid (3200) Phaethon. We found that Phaethon is a B-type asteroid, in agreement with previous studies, and that it shows no evidence for rotational color variation. The sub-solar latitude during our observation period was approximately 55 degrees S, which corresponded to the southern hemisphere of Phaethon. Thus, we found that the southern hemisphere of Phaethon has a homogeneous surface. We compared our spectra with existing spectral data to examine the latitudinal surface properties of Phaethon. The result showed that it doesn't have a latitudinal color variation. To explain this observation, we investigated the solar-radiation heating effect on Phaethon, and the result suggested that Phaethon underwent a uniform thermal metamorphism regardless of latitude, which was consistent with our observations. Based on this result, we discuss the homogeneity of the surface of Phaethon.
机译:时间序列多波段光度法和光谱法于11月至12月进行。 2017年调查小行星(3200)Phaethon表面的均匀性。我们发现Phaethon是B型小行星,与先前的研究一致,并且它没有显示出旋转颜色变化的证据。在我们的观察期内,太阳副纬度大约为55度南半球,对应于Phaethon的南半球。因此,我们发现Phaethon的南半球具有均匀的表面。我们将光谱与现有光谱数据进行比较,以检查Phaethon的纬度表面特性。结果表明它没有纬度颜色变化。为了解释这一发现,我们研究了太阳辐射对费森的加热效应,结果表明费森无论纬度如何都经历了均匀的热变质作用,这与我们的观察一致。基于此结果,我们讨论了Phaethon表面的均匀性。

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