Literature DB >> 30890588

Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu-A spinning top-shaped rubble pile.

S Watanabe1,2, M Hirabayashi3, N Hirata4, Na Hirata5, R Noguchi2, Y Shimaki2, H Ikeda6, E Tatsumi7, M Yoshikawa2,8, S Kikuchi2, H Yabuta9, T Nakamura10, S Tachibana7,2, Y Ishihara2, T Morota11, K Kitazato4, N Sakatani2, K Matsumoto12,8, K Wada13, H Senshu13, C Honda4, T Michikami14, H Takeuchi2,8, T Kouyama15, R Honda16, S Kameda17, T Fuse18, H Miyamoto7, G Komatsu19,13, S Sugita7, T Okada2,7, N Namiki12,8, M Arakawa5, M Ishiguro20, M Abe2,8, R Gaskell21, E Palmer21, O S Barnouin22, P Michel23, A S French24, J W McMahon24, D J Scheeres24, P A Abell25, Y Yamamoto2,8, S Tanaka5, K Shirai2, M Matsuoka2, M Yamada13, Y Yokota2,16, H Suzuki26, K Yoshioka7, Y Cho7, S Tanaka5, N Nishikawa5, T Sugiyama4, H Kikuchi7, R Hemmi7, T Yamaguchi2, N Ogawa2, G Ono6, Y Mimasu2, K Yoshikawa6, T Takahashi2, Y Takei2, A Fujii2, C Hirose6, T Iwata2,8, M Hayakawa2, S Hosoda2, O Mori2, H Sawada2, T Shimada2, S Soldini2, H Yano2,8, R Tsukizaki2, M Ozaki2,8, Y Iijima2, K Ogawa5, M Fujimoto2, T-M Ho27, A Moussi28, R Jaumann29, J-P Bibring30, C Krause31, F Terui2, T Saiki2, S Nakazawa2, Y Tsuda2,8.   

Abstract

The Hayabusa2 spacecraft arrived at the near-Earth carbonaceous asteroid 162173 Ryugu in 2018. We present Hayabusa2 observations of Ryugu's shape, mass, and geomorphology. Ryugu has an oblate "spinning top" shape, with a prominent circular equatorial ridge. Its bulk density, 1.19 ± 0.02 grams per cubic centimeter, indicates a high-porosity (>50%) interior. Large surface boulders suggest a rubble-pile structure. Surface slope analysis shows Ryugu's shape may have been produced from having once spun at twice the current rate. Coupled with the observed global material homogeneity, this suggests that Ryugu was reshaped by centrifugally induced deformation during a period of rapid rotation. From these remote-sensing investigations, we identified a suitable sample collection site on the equatorial ridge.
Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.

Entities:  

Year:  2019        PMID： 30890588     DOI： 10.1126/science.aav8032

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


  10 in total

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

Authors:  S Sugita; R Honda; T Morota; S Kameda; H Sawada; E Tatsumi; M Yamada; C Honda; Y Yokota; T Kouyama; N Sakatani; K Ogawa; H Suzuki; T Okada; N Namiki; S Tanaka; Y Iijima; K Yoshioka; M Hayakawa; Y Cho; M Matsuoka; N Hirata; N Hirata; H Miyamoto; D Domingue; M Hirabayashi; T Nakamura; T Hiroi; T Michikami; P Michel; R-L Ballouz; O S Barnouin; C M Ernst; S E Schröder; H Kikuchi; R Hemmi; G Komatsu; T Fukuhara; M Taguchi; T Arai; H Senshu; H Demura; Y Ogawa; Y Shimaki; T Sekiguchi; T G Müller; A Hagermann; T Mizuno; H Noda; K Matsumoto; R Yamada; Y Ishihara; H Ikeda; H Araki; K Yamamoto; S Abe; F Yoshida; A Higuchi; S Sasaki; S Oshigami; S Tsuruta; K Asari; S Tazawa; M Shizugami; J Kimura; T Otsubo; H Yabuta; S Hasegawa; M Ishiguro; S Tachibana; E Palmer; R Gaskell; L Le Corre; R Jaumann; K Otto; N Schmitz; P A Abell; M A Barucci; M E Zolensky; F Vilas; F Thuillet; C Sugimoto; N Takaki; Y Suzuki; H Kamiyoshihara; M Okada; K Nagata; M Fujimoto; M Yoshikawa; Y Yamamoto; K Shirai; R Noguchi; N Ogawa; F Terui; S Kikuchi; T Yamaguchi; Y Oki; Y Takao; H Takeuchi; G Ono; Y Mimasu; K Yoshikawa; T Takahashi; Y Takei; A Fujii; C Hirose; S Nakazawa; S Hosoda; O Mori; T Shimada; S Soldini; T Iwata; M Abe; H Yano; R Tsukizaki; M Ozaki; K Nishiyama; T Saiki; S Watanabe; Y Tsuda
Journal:  Science       Date:  2019-03-19       Impact factor: 47.728

2.  Eye of a skull reveals details of cometary materials.

Authors:  Erik Asphaug
Journal:  Nature       Date:  2020-10       Impact factor: 49.962

3.  News Feature: Diamonds in the rubble.

Authors:  Nola Taylor Redd
Journal:  Proc Natl Acad Sci U S A       Date:  2020-05-06       Impact factor: 11.205

4.  Small All-Range Lidar for Asteroid and Comet Core Missions.

Authors:  Xiaoli Sun; Daniel R Cremons; Erwan Mazarico; Guangning Yang; James B Abshire; David E Smith; Maria T Zuber; Mark Storm; Nigel Martin; Jacob Hwang; Jeff D Beck; Nathan R Huntoon; Dick M Rawlings
Journal:  Sensors (Basel)       Date:  2021-04-28       Impact factor: 3.576

Review 5.  Observations, Meteorites, and Models: A Preflight Assessment of the Composition and Formation of (16) Psyche.

Authors:  L T Elkins-Tanton; E Asphaug; J F Bell; H Bercovici; B Bills; R Binzel; W F Bottke; S Dibb; D J Lawrence; S Marchi; T J McCoy; R Oran; R S Park; P N Peplowski; C A Polanskey; T H Prettyman; C T Russell; L Schaefer; B P Weiss; M A Wieczorek; D A Williams; M T Zuber
Journal:  J Geophys Res Planets       Date:  2020-03-25       Impact factor: 3.755

6.  Using dust shed from asteroids as microsamples to link remote measurements with meteorite classes.

Authors:  B A Cohen; J R Szalay; A S Rivkin; J A Richardson; R L Klima; C M Ernst; N L Chabot; Z Sternovsky; M Horányi
Journal:  Meteorit Planet Sci       Date:  2019-07-15       Impact factor: 2.487

7.  Hemispherical differences in the shape and topography of asteroid (101955) Bennu.

Authors:  M G Daly; O S Barnouin; J A Seabrook; J Roberts; C Dickinson; K J Walsh; E R Jawin; E E Palmer; R Gaskell; J Weirich; T Haltigin; D Gaudreau; C Brunet; G Cunningham; P Michel; Y Zhang; R-L Ballouz; G Neumann; M E Perry; L Philpott; M M Al Asad; C L Johnson; C D Adam; J M Leonard; J L Geeraert; K Getzandanner; M C Nolan; R T Daly; E B Bierhaus; E Mazarico; B Rozitis; A J Ryan; D N DellaGiustina; B Rizk; H C M Susorney; H L Enos; D S Lauretta
Journal:  Sci Adv       Date:  2020-10-08       Impact factor: 14.136

8.  Inferring interiors and structural history of top-shaped asteroids from external properties of asteroid (101955) Bennu.

Authors:  Yun Zhang; Patrick Michel; Olivier S Barnouin; James H Roberts; Michael G Daly; Ronald-L Ballouz; Kevin J Walsh; Derek C Richardson; Christine M Hartzell; Dante S Lauretta
Journal:  Nat Commun       Date:  2022-08-06       Impact factor: 17.694

9.  Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA.

Authors:  Kentaro Terada; Tomokatsu Morota; Mami Kato
Journal:  Nat Commun       Date:  2020-07-21       Impact factor: 14.919

10.  Collisional formation of top-shaped asteroids and implications for the origins of Ryugu and Bennu.

Authors:  P Michel; R-L Ballouz; O S Barnouin; M Jutzi; K J Walsh; B H May; C Manzoni; D C Richardson; S R Schwartz; S Sugita; S Watanabe; H Miyamoto; M Hirabayashi; W F Bottke; H C Connolly; M Yoshikawa; D S Lauretta
Journal:  Nat Commun       Date:  2020-05-27       Impact factor: 14.919
  10 in total

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