日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

セッション記号 P (宇宙惑星科学) » P-PS 惑星科学

[P-PS03] Solar System Small Bodies: A New Frontier Arising Hayabusa 2, OSIRIS-REx and Other Projects

2019年5月29日(水) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:石黒 正晃(ソウル大学物理天文学科)、中本 泰史(東京工業大学)、安部 正真(宇宙航空研究開発機構宇宙科学研究所)、Olivier S Barnouin(Johns Hopkins University Applied Physics Laboratory)

[PPS03-P22] 北大1.6mピリカ望遠鏡による不活動彗星核P/2016 BA14の可視光測光・分光・偏光観測

*山形 稜1関口 朋彦1岡崎 良1土井 和也1黒田 大介2石黒 正晃3内藤 博之4 (1.北海道教育大学、2.京都大学、3.ソウル大学、4.なよろ市立天文台)

キーワード:P/2016 BA14、測光観測、分光観測、偏光観測、D-タイプ

We performed photometric, spectroscopic and polarimetric observations of an inactive comet, P/2016 BA14 with the 1.6m Pirka Telescope, Hokkaido.

P/2016 BA14 (a=3.02 au, e=0.67, i=18.9 deg.) was discovered as an unusual asteroid with a cometary orbit by the PANSTAARS on 2016 January 21.Since Knight et al. 2016 detected its cometary tail when the object close to sun(r=1.018au). It was classified into a Jupiter Family Comets. It can be regarded as a bare nucleus invisible coma because very weak comet activity that is different from general comet. There is a remarkable similarity between the orbits of 252P/LINEAR (a=3.05au, e=0.67, i=10.4deg) and P/2016 BA14. Jupiter Tisserand parameter is 252P/LINEAR and that of P/2016 BA14 are 2.82. P/2016 BA14 and 252P/LINEAR is division comet that is originally same comet (Jian-Yang.2017).

In this study, surface reflection properties of P/2016 BA14 classify D-type asteroids (Bus-DeMeo taxonomy) from result of visible spectroscopy (435-820nm). Color of surface is little red as D-type asteroid, but very blue as comet nucleus from result of BVRI photometry. The linear polarization Pr=10.46.±0.11% (α=46°) is in close accord with that of D-type asteroids and comet nucleus.