Investigation of surface homogeneity of (3200) Phaethon. (arXiv:1812.01851v1 [astro-ph.EP])

Investigation of surface homogeneity of (3200) Phaethon. (arXiv:1812.01851v1 [astro-ph.EP])
<a href="http://arxiv.org/find/astro-ph/1/au:+Lee_H/0/1/0/all/0/1">Hee-Jae Lee</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kim_M/0/1/0/all/0/1">Myung-Jin Kim</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kim_D/0/1/0/all/0/1">Dong-Heun Kim</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Moon_H/0/1/0/all/0/1">Hong-Kyu Moon</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Choi_Y/0/1/0/all/0/1">Young-Jun Choi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kim_C/0/1/0/all/0/1">Chun-Hwey Kim</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lee_B/0/1/0/all/0/1">Byeong-Cheol Lee</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yoshida_F/0/1/0/all/0/1">Fumi Yoshida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Roh_D/0/1/0/all/0/1">Dong-Goo Roh</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Seo_H/0/1/0/all/0/1">Haingja Seo</a>

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
degree 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.

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
degree 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.

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