[U-06_28PO1] 太陽系小天体研究の新展開

[U06-P06] TIRによるSCIクレーターの検出方法の検討

*和田 浩二¹、中村 昭子²、黒澤 耕介¹、SCI チーム ³、TIR チーム ³ (1.千葉工業大学惑星探査研究センター、2.神戸大学大学院理学研究科地球惑星科学専攻、3.はやぶさ２プロジェクト)

キーワード：はやぶさ２, 衝突, 小惑星, 熱赤外カメラ, 小型搭載型衝突装置, クレーター熱モデル

In Hayabusa-2 mission, a crater will be formed on the surface of a C-type asteroid 1999JU3 using Small Carry-on Impactor (SCI) and the crater should be quickly detected from the mother ship. The detection, however, will become difficult when the crater is very small with a diameter of only 30 cm, near to the resolution limit of on-board cameras. On the other hand, Thermal InfraRed Camera (TIR) mounted on Hayabusa-2 has a possibility to detect such a small crater even if the crater size is sub-pixel of TIR resolution, because the temperature on the surface of a small crater is expected to be different from that around the crater. We, therefore, have started examination about the possibility and method to detect a SCI-formed small crater using TIR. In this presentation, we introduce the basic idea and the preliminary results of our modeling.