천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제42권2호
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- Pages.50.2-50.2
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- 2017
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- 1226-2692(pISSN)
The polarimetric study of (331471) 1984QY1: an asteroid in comet-like orbit
- Kim, Jooyeon (Seoul National University) ;
- Ishiguro, Masateru (Seoul National University) ;
- Bach, Yoonsoo P. (Seoul National University) ;
- Kuroda, Daisuke (Okayama Astrophysical Observatory) ;
- Naito, Hiroyuki (Nayoro City Astronomical Observatory) ;
- Kim, Yoonyoung (Seoul National University) ;
- Kwon, Yuna G. (Seoul National University) ;
- Imai, Masataka (Hokkaido University) ;
- Kuramoto, Kiyoshi (Hokkaido University) ;
- Watanabe, Makoto (Okayama University of Science)
- 발행 : 2017.10.10
초록
Spatial distribution of atmosphereless bodies in the solar system provides an important clue as to their origins, namely asteroids from Mainbelt or comets from outer solar system. It is, however, difficult to distinguish asteroids and dormant comets due to their similar appearances. In this study, we conducted a unique observation to differentiate asteroids and dormant comets in terms of 'polarimetry'. We observed (331471) 1984 QY1 (hereafter QY1) at large phase angles using the Multi-Spectral Imager (MSI) on the 1.6-m Pirka Telescope from UT 2016 May 25 to June 24. QY1 is a dormant comet candidate in terms of the dynamical properties (i.e. the Tisserand parameter with respect to Jupiter, TJ = 2.68). We analyzed the polarization degree of QY1 as a function of phase angle and found its maximum polarization degree,
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