@article{aa88cf601bd54949809e898dbaa0f6c0,
title = "Full rotationally phase-resolved visible reflectance spectroscopy of 3200 Phaethon",
abstract = "We present time-series optical spectroscopic observations of 3200 Phaethon during its 2007 return, complemented with R-band photometry. The spectral gradient centered around 0.55 μm varies between −5.0 %/0.1 μm and 0.6 %/0.1μm, indicating a B- or C-type color. Moreover, rotational modulation of the spectral slope of this asteroid suggests its surface compositional inhomogeneity, particularly the existence of a C-type surface at a certain longitude on this asteroid.",
keywords = "Asteroids: individual (3200 Phaethon, 155140 2005 UD), Comets, Meteorites, Meteoroids, Meteors, Methods: observational, Minor planets, Photometric, Planetary systems, Techniques: spectroscopic",
author = "Katsuhito Ohtsuka and Takashi Ito and Daisuke Kinoshita and Shinsuke Abe and Kyosuke Sawai and Kazuhiro Funabashi and Ryo Kato and Seidai Miyasaka and Sunao Hasegawa and Tomoki Nakamura and Chen, {Wen Ping}",
note = "Funding Information: A major part of our observations was carried out at Lulin Observatory operated by National Central University (NCU), Taiwan. The authors are grateful to the local supporters at Lulin: Jing-Chuan Du, Hao-Wei Shih, Jun-Shiung Shih, and Zong-Jing Wan. Hung-Chin Lin and Yu-Chi Cheng kindly offered us useful information on the Hiyoyu spectrograph. A part of the data analysis was carried out at Center for Computational Astrophysics (CfCA), National Astronomical Observatory of Japan (NAOJ). Alessondra Springmann introduced Lance Benner to us, who provided us with critical information on his unpublished radar observation in 2007 that gave us important clues for estimating the shape of Phaethon. The authors have benefited from stimulating enlightenment through discussions with Masateru Ishiguro and Fumi Yoshida. DK thanks Center for Planetary Science (CPS), Kobe University, for providing us with opportunities of interaction and discussion with number of planetary scientists. This work is supported by the research grant from National Science Council of Taiwan (ID 99–2112–M–008–013), the Ministry of Education of Taiwan under {\textquoteleft}{\textquoteleft}Aim for Top University Program,{\textquoteright}{\textquoteright} and the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant, JP25400458/2013–2016 and JP16K05546/2016–2018. Also, the work of SH was supported by the JSPS KAKENHI Grant, JP15K05277/20152020 and JP20K04055/20202023 and the Hypervelocity Impact Facility (former facility name: the Space Plasma Laboratory), ISAS/JAXA. Funding Information: A major part of our observations was carried out at Lulin Observatory operated by National Central University (NCU), Taiwan. The authors are grateful to the local supporters at Lulin: Jing-Chuan Du, Hao-Wei Shih, Jun-Shiung Shih, and Zong-Jing Wan. Hung-Chin Lin and Yu-Chi Cheng kindly offered us useful information on the Hiyoyu spectrograph. A part of the data analysis was carried out at Center for Computational Astrophysics (CfCA), National Astronomical Observatory of Japan (NAOJ). Alessondra Springmann introduced Lance Benner to us, who provided us with critical information on his unpublished radar observation in 2007 that gave us important clues for estimating the shape of Phaethon. The authors have benefited from stimulating enlightenment through discussions with Masateru Ishiguro and Fumi Yoshida. DK thanks Center for Planetary Science (CPS), Kobe University, for providing us with opportunities of interaction and discussion with number of planetary scientists. This work is supported by the research grant from National Science Council of Taiwan (ID 99–2112–M–008–013 ), the Ministry of Education of Taiwan under {\textquoteleft}{\textquoteleft}Aim for Top University Program,{\textquoteright}{\textquoteright} and the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant, JP25400458/2013–2016 and JP16K05546/2016–2018 . Also, the work of SH was supported by the JSPS KAKENHI Grant, JP15K05277/20152020 and JP20K04055/20202023 and the Hypervelocity Impact Facility (former facility name: the Space Plasma Laboratory), ISAS/JAXA . Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",
year = "2020",
month = oct,
day = "15",
doi = "10.1016/j.pss.2020.104940",
language = "English",
volume = "191",
journal = "Planetary and Space Science",
issn = "0032-0633",
publisher = "Elsevier Ltd.",
}