りゅうぐう試料「全体像描ける」　特徴、現場観測と一致―東大など

　宇宙航空研究開発機構（ＪＡＸＡ）や東京大などは、探査機「はやぶさ２」が小惑星「りゅうぐう」から持ち帰った試料の形状などの特徴が、２度の着陸時や投下した探査ロボットで撮影したりゅうぐう表面の小石や砂とよく一致したとする解析結果を、１０日付の米科学誌サイエンスに発表した。
　研究チームの橘省吾・東大教授は「採取地点が特殊だと、りゅうぐうの全体像を語れない。代表する試料と分かったことで、今後の分析で全体像を描ける」と話している。（2022/02/11-04:33）

Pebbles and sand brought by the Hayabusa2 explorer from Ryugu are "a representative sample" of the asteroid, a Japanese team has said.
   The team, including researchers from the Japan Aerospace Exploration Agency, or JAXA, and the University of Tokyo, published this on the Thursday edition of U.S. journal Science.
   Hayabusa2 landed on Ryugu twice, in February 2019 and July the same year, and collected samples of the asteroid. A total of 5.4 grams of pebbles and sand were in a capsule brought back to Earth in December 2020.
   The team conducted a detailed analysis of images of materials of Ryugu captured at the time of Hayabusa2 's landings on the asteroid and identified the shapes of 67 items including pebbles.
   It also compared the characteristics of the collected samples with those of pebbles and sand shown in a number of images taken at many locations on Ryugu by the Minerva-II rover sent from Hayabusa2 to the asteroid in September 2018.