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Polarimetric Properties of the Near--Sun Asteroid (155140) 2005 UD in Comparison with Other Asteroids and Meteoritic Samples
Masateru Ishiguro, Yoonsoo P. Bach, Jooyeon Geem +26
The investigation of asteroids near the Sun is important for understanding the final evolutionary stage of primitive solar system objects. A near-Sun asteroid, (155140) 2005 UD, ha…
Optical and Near-Infrared Polarimetry of Non-Periodic Comet C/2013 US10 (Catalina)
Y. G. Kwon, M. Ishiguro, D. Kuroda +12
We present an optical and near-infrared (hereafter NIR) polarimetric study of a comet C/2013 US10 (Catalina) observed on UT 2015 December 17-18 at phase angles of =52.1 deg - 53…
New observational evidence of active asteroid P/2010 A2: Slow rotation of the largest fragment
Yoonyoung Kim, Masateru Ishiguro, Myung Gyoon Lee
We report new observations of the active asteroid P/2010 A2 taken when it made its closest approach to the Earth (1.06 au in 2017 January) after its first discovery in 2010. Despit…
2014-2015 Multiple Outbursts of 15P/Finlay
Masateru Ishiguro, Daisuke Kuroda, Hidekazu Hanayama +21
Multiple outbursts of a Jupiter-family comet, 15P/Finlay, occurred from late 2014 to early 2015. We conducted an observation of the comet after the first outburst and subsequently…
Monitoring Observations of the Jupiter-Family Comet 17P/Holmes during 2014 Perihelion Passage
Yuna Grace Kwon, Masateru Ishiguro, Hidekazu Hanayama +15
We performed a monitoring observation of a Jupiter-Family comet, 17P/Holmes, during its 2014 perihelion passage to investigate its secular change in activity. The comet has drawn t…