High-resolution observations of bright boulders on asteroid Ryugu: 1. Size frequency distribution and morphology

  title={High-resolution observations of bright boulders on asteroid Ryugu: 1. Size frequency distribution and morphology},
  author={Chiho Sugimoto and Eri Tatsumi and Yuichiro Cho and Tomokatsu Morota and Rie Honda and Shingo Kameda and Y. Yokota and Koki Yumoto and Minami Aoki and Daniella N. DellaGiustina and Tatsuhiro Michikami and Takahiro Hiroi and Deborah Domingue and Patrick Michel and Stefan E. Schroder and Tomoki Nakamura and Manabu Yamada and Naoya Sakatani and Toru Kouyama and Chikatoshi Honda and Masahiko Hayakawa and Moe Matsuoka and Hidehiko Suzuki and Kazuo Yoshioka and Kazunori Ogawa and Hirotaka Sawada and Masahiko Arakawa and Takanao Saiki and Hiroshi Imamura and Y. Takagi and Hajime Yano and Kei Shirai and Chisato Okamoto and Yuichi Tsuda and Satoru Nakazawa and Yuichi Iijima and Seiji Sugita},



Collisional history of Ryugu’s parent body from bright surface boulders

The asteroid (162173) Ryugu and other rubble-pile asteroids are likely re-accumulated fragments of much larger parent bodies that were disrupted by impacts. However, the collisional and orbital

Craters, boulders and regolith of (101955) Bennu indicative of an old and dynamic surface

Small, kilometre-sized near-Earth asteroids are expected to have young and frequently refreshed surfaces for two reasons: collisional disruptions are frequent in the main asteroid belt where they

Low thermal conductivity boulder with high porosity identified on C-type asteroid (162173) Ryugu

C-type asteroids are among the most pristine objects in the Solar System, but little is known about their interior structure and surface properties. Telescopic thermal infrared observations have so

Geologic History and Crater Morphology of Asteroid (162173) Ryugu

Crater morphology and surface age of asteroid (162173) Ryugu are characterized using the high‐resolution images obtained by the Hayabusa2 spacecraft. Our observations reveal that the abundant

Properties of rubble-pile asteroid (101955) Bennu from OSIRIS-REx imaging and thermal analysis

Establishing the abundance and physical properties of regolith and boulders on asteroids is crucial for understanding the formation and degradation mechanisms at work on their surfaces. Using images

Bright carbonate veins on asteroid (101955) Bennu: Implications for aqueous alteration history

Global spectral observations by the OSIRIS-REx spacecraft have shown that carbon-bearing materials, including organics and/or carbonates, are widespread on the surface of near-Earth asteroid (101955) Bennu.

The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes

Spectral observations and a principal components analysis suggest that Ryugu originates from the Eulalia or Polana asteroid family in the inner main belt, possibly via more than one generation of parent bodies.