論文

2022年10月

Characterization of the MASCOT landing area by Hayabusa2

Astronomy & Astrophysics
  • Stefan Schröder
  • Naoya Sakatani
  • Rie Honda
  • Eri Tatsumi
  • Yasuhiro Yokota
  • Deborah Domingue
  • Yuichiro Cho
  • Shingo Kameda
  • Kohei Kitazato
  • Toru Kouyama
  • Moe Matsuoka
  • Akira Miura
  • Tomokatsu Morota
  • Tatsuaki Okada
  • Hirotaka Sawada
  • Hiroki Senshu
  • Yuri Shimaki
  • Seiji Sugita
  • Satoshi Tanaka
  • Hikaru Yabuta
  • Manabu Yamada
  • Matthias Grott
  • Maximilian Hamm
  • Tra-Mi Ho
  • Ralf Jaumann
  • Stefano Mottola
  • Katharina Otto
  • Nicole Schmitz
  • Frank Scholten
  • 全て表示

666
開始ページ
A164
終了ページ
A164
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1051/0004-6361/202244059
出版者・発行元
EDP Sciences

Context. After landing on C-type asteroid Ryugu, MASCOT imaged brightly colored, submillimeter-sized inclusions in a small rock. Hayabusa2 successfully returned a sample of small particles from the surface of Ryugu, but none of these appear to harbor such inclusions. The samples are considered representative of Ryugu.

Aims. To understand the apparent discrepancy between MASCOT observations and Ryugu samples, we assess whether the MASCOT landing site, and the rock by implication, is perhaps atypical for Ryugu.

Methods. We analyzed observations of the MASCOT landing area acquired by three instruments on board Hayabusa2: a camera (ONC), a near-infrared spectrometer (NIRS3), and a thermal infrared imager. We compared the landing area properties thus retrieved with those of the average Ryugu surface.

Results. We selected several areas and landforms in the landing area for analysis: a small crater, a collection of smooth rocks, and the landing site itself. The crater is relatively blue and the rocks are relatively red. The spectral and thermophysical properties of the landing site are very close to those of the average Ryugu surface. The spectral properties of the MASCOT rock are probably close to average, but its thermal inertia may be somewhat higher.

Conclusions. The MASCOT rock can also be considered representative of Ryugu. Some of the submillimeter-sized particles in the returned samples stand out because of their atypical spectral properties. Such particles may be present as inclusions in the MASCOT rock.

リンク情報
DOI
https://doi.org/10.1051/0004-6361/202244059
URL
https://www.aanda.org/10.1051/0004-6361/202244059/pdf
ID情報
  • DOI : 10.1051/0004-6361/202244059
  • ISSN : 0004-6361
  • eISSN : 1432-0746

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