@inproceedings{oai:jaxa.repo.nii.ac.jp:00007525,
 author = {相田, 彩夏 and 芝崎, 裕介 and 白川, 健一 and 森田, 秀郎 and 川口, 淳一郎 and Aida, Saika and Shibasaki, Yusuke and Shirakawa, Kenichi and Morita, Hideo and Kawaguchi, Junichiro},
 book = {第16回アストロダイナミクスシンポジウム講演後刷り集　2006, Proceedings of 16th Workshop on JAXA Astrodynamics and Flight Mechanics},
 month = {Mar},
 note = {小惑星探査機「はやぶさ(MUSES-C: Asteroid Sample-return Spacecraft)」は、2003年5月、ISAS/JAXAにより打ち上げられた。はやぶさのミッションは、サンプルリターンに必要な各工学技術の実証に加え、世界初となる小惑星からのサンプルリターンを行うことである。イオンエンジンを用いた2年以上の航行フェーズの後、2005年9月12日に、はやぶさは小惑星イトカワ(Asteroid 25143)に到着した。小惑星近傍では、小惑星の詳細な観測に成功し、サンプル採取のための着地2回を含む計5 回の降下が行われた。地球への帰還は2010年の予定である。本論文では、1回目に行われた小惑星着地時における、はやぶさの軌道・姿勢について扱う。降下初期、小惑星からの高度250mまでは、小惑星画像を用いた誘導航法が行われ、その後は自立航法により着地したが、後半の軌道をもとめることは困難であった。小惑星画像やセンサデータが十分に得られていないためである。しかし、1回目の降下においては、断片的ではあるが1部のセンサデータが得られているため、小惑星形状モデルや小惑星上に投下されたターゲットマーカの画像を組み合わせて軌道・姿勢を推定する。, On May 9, 2003, the Institute of Space and Astronautical Science (ISAS/JAXA) launched an asteroid sample return spacecraft called 'Hayabusa (MUSES-C: Asteroid Sample-return Spacecraft)' (named after falcon). Hayabusa aims for the world's first sample return from an asteroid along with demonstrations of several space engineering technologies for sample-return. After more than two years' cruising phase by its ion engines, it arrived at Itokawa (Asteroid 25143) on September 12, 2005. In the vicinity of the asteroid, Hayabusa succeeded in detail asteroid observations and performed five times' descent flights including twice landing operation on Itokawa to obtain asteroid samples. Its Earth return is expected around 2010. In this research, the Hayabusa trajectory and attitude during its touchdowns are discussed in detail. In the initial descent operation, above the altitude of 250 m, the guidance and navigation was conducted by determining the position using Itokawa images. After that, Hayabusa descended to Itokawa autonomously. The trajectory at this phase has not been revealed yet. It is because Itokawa images and navigation sensor data were not fully obtained. However, as to the first landing, several kinds of useful sensor data exist, though they are fragmentary. The trajectory and attitude of the final descent phase during the first landing operation was estimated by combining information from these sensor data. The Itokawa 3D shape model and the T/M (Target Marker) image on the Itokawa ground surface were also used., 資料番号: AA0063481024},
 pages = {133--138},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)},
 title = {Trajectories and attitudes of an asteroid sample return spacecraft Hayabusa during touchdowns on Itokawa},
 year = {2007}
}