Search Results - "Shimaki, Y"
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Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu-A spinning top-shaped rubble pile
Published in Science (American Association for the Advancement of Science) (19-04-2019)“…The Hayabusa2 spacecraft arrived at the near-Earth carbonaceous asteroid 162173 Ryugu in 2018. We present Hayabusa2 observations of Ryugu's shape, mass, and…”
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An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime
Published in Science (American Association for the Advancement of Science) (03-04-2020)“…The Hayabusa2 spacecraft investigated the small asteroid Ryugu, which has a rubble-pile structure. We describe an impact experiment on Ryugu using Hayabusa2's…”
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The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy
Published in Science (American Association for the Advancement of Science) (19-04-2019)“…The near-Earth asteroid 162173 Ryugu, the target of the Hayabusa2 sample-return mission, is thought to be a primitive carbonaceous object. We report…”
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Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution
Published in Science (American Association for the Advancement of Science) (08-05-2020)“…The near-Earth asteroid (162173) Ryugu is thought to be a primitive carbonaceous object that contains hydrated minerals and organic molecules. We report sample…”
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Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth
Published in Science (American Association for the Advancement of Science) (04-03-2022)“…The Hayabusa2 spacecraft investigated the C-type (carbonaceous) asteroid (162173) Ryugu. The mission performed two landing operations to collect samples of…”
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Mid-infrared emissivity of partially dehydrated asteroid (162173) Ryugu shows strong signs of aqueous alteration
Published in Nature communications (18-01-2022)“…The near-Earth asteroid (162173) Ryugu, the target of Hayabusa2 space mission, was observed via both orbiter and the lander instruments. The infrared…”
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Effect of projectile shape and interior structure on crater size in strength regime
Published in Earth, planets, and space (30-08-2022)“…Experiments on crater formation in the strength regime were conducted using projectiles of various shapes with an aspect ratio of ~ 1, including both solid and…”
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Particle size distributions inside and around the artificial crater produced by the Hayabusa2 impact experiment on Ryugu
Published in Earth, planets, and space (17-10-2022)“…Japanese Hayabusa2 spacecraft has successfully carried out an impact experiment using a small carry-on impactor (SCI) on an asteroid (162173) Ryugu. We examine…”
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Thermally altered subsurface material of asteroid (162173) Ryugu
Published in Nature astronomy (01-03-2021)“…Analyses of meteorites and theoretical models indicate that some carbonaceous near-Earth asteroids may have been thermally altered due to radiative heating…”
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Collisional history of Ryugu’s parent body from bright surface boulders
Published in Nature astronomy (01-01-2021)“…The asteroid (162173) Ryugu and other rubble-pile asteroids are likely re-accumulated fragments of much larger parent bodies that were disrupted by impacts…”
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Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body
Published in Nature astronomy (01-08-2021)“…Planetesimals—the initial stage of the planetary formation process—are considered to be initially very porous aggregates of dusts 1 , 2 , and subsequent…”
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Highly porous nature of a primitive asteroid revealed by thermal imaging
Published in Nature (London) (01-03-2020)“…Carbonaceous (C-type) asteroids 1 are relics of the early Solar System that have preserved primitive materials since their formation approximately 4.6 billion…”
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Hayabusa2 extended mission: New voyage to rendezvous with a small asteroid rotating with a short period
Published in Advances in space research (01-08-2021)“…•Hayabusa2 plans its extended mission to rendezvous with 1998 KY26 in 2031.•We show science assessments to select the final two candidates, 1998 KY26 and 2001…”
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Thermally Altered Subsurface Material of Asteroid 162173 Ryugu
Published in Nature astronomy (04-01-2021)“…Studies of meteorite analysis and theoretical modeling have indicated the possibility that some carbonaceous near-Earth asteroids are thermally altered due to…”
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Lesson to be learned from the cross infection of tuberculosis among infants at the Shinjuku Red Cross Hospital
Published in Kangogaku zasshi (01-05-1969)Get more information
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Effect of projectile shape and interior structure on crater size in strength regime
Published 24-08-2022“…Experiments on crater formation in the strength regime were conducted using projectiles of various shapes with an aspect ratio of ~1, including both solid and…”
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Interacting effects of zinc and cadmium on the cadmium distribution in the mouse
Published in Veterinary and human toxicology (01-10-1987)“…Effects of zinc (Zn) on cadmium (Cd) distribution in the mouse body were investigated after intranasal administration. The amounts of Cd (2 x 10(-6) M/0.02 ml)…”
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Hayabusa2 Extended Mission: New Voyage to Rendezvous with a Small Asteroid Rotating with a Short Period
Published 17-04-2021“…Hayabusa2 is the Japanese Asteroid Return Mission and targeted the carbonaceous asteroid Ryugu, conducted by the Japan Aerospace Exploration Agency (JAXA). The…”
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