Search Results - "OKADA, Tatsuaki"
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Thermography of Asteroid and Future Applications in Space Missions
Published in Applied sciences (01-03-2020)“…The Near-Earth Asteroid 162173 Ryugu is a C-type asteroid which preserves information about the ancient Solar System and is considered enriched in volatiles…”
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Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2
Published in Space science reviews (01-07-2017)“…The thermal infrared imager TIR onboard Hayabusa2 has been developed to investigate thermo-physical properties of C-type, near-Earth asteroid 162173 Ryugu. TIR…”
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Uracil in the carbonaceous asteroid (162173) Ryugu
Published in Nature communications (21-03-2023)“…The pristine sample from the near-Earth carbonaceous asteroid (162173) Ryugu collected by the Hayabusa2 spacecraft enabled us to analyze the pristine…”
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Thermophysical properties of the surface of asteroid 162173 Ryugu: Infrared observations and thermal inertia mapping
Published in Icarus (New York, N.Y. 1962) (15-09-2020)“…TIR, the thermal infrared imager on Hayabusa2, acquired high-resolution thermal images of the asteroid 162173 Ryugu for one asteroid rotation period on August…”
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Insights into the formation and evolution of extraterrestrial amino acids from the asteroid Ryugu
Published in Nature communications (17-03-2023)“…All life on Earth contains amino acids and carbonaceous chondrite meteorites have been suggested as their source at the origin of life on Earth. While many…”
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MASCOT—The Mobile Asteroid Surface Scout Onboard the Hayabusa2 Mission
Published in Space science reviews (01-07-2017)“…On December 3rd, 2014, the Japanese Space Agency (JAXA) launched successfully the Hayabusa2 (HY2) spacecraft to its journey to Near Earth asteroid (162173)…”
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Chondrule-like objects and Ca-Al-rich inclusions in Ryugu may potentially be the oldest Solar System materials
Published in Nature communications (16-02-2023)“…Chondrule-like objects and Ca-Al-rich inclusions (CAIs) are discovered in the retuned samples from asteroid Ryugu. Here we report results of oxygen isotope,…”
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Spectrally blue hydrated parent body of asteroid (162173) Ryugu
Published in Nature communications (05-10-2021)“…Ryugu is a carbonaceous rubble-pile asteroid visited by the Hayabusa2 spacecraft. Small rubble pile asteroids record the thermal evolution of their much larger…”
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Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System Material
Published in The Astrophysical journal (01-04-2024)“…Abstract The analysis of samples returned from the C-type asteroid Ryugu has drastically advanced our knowledge of the evolution of early solar system…”
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The BepiColombo Mercury Imaging X-Ray Spectrometer: Science Goals, Instrument Performance and Operations
Published in Space science reviews (01-12-2020)“…The Mercury Imaging X-ray Spectrometer is a highly novel instrument that is designed to map Mercury’s elemental composition from orbit at two angular…”
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Breunnerite grain and magnesium isotope chemistry reveal cation partitioning during aqueous alteration of asteroid Ryugu
Published in Nature communications (05-09-2024)“…Returned samples from the carbonaceous asteroid (162173) Ryugu provide pristine information on the original aqueous alteration history of the Solar System…”
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Homogeneity and heterogeneity in near-infrared FTIR spectra of Ryugu returned samples
Published in Earth, planets, and space (01-12-2023)“…Surface and subsurface materials of C-type near-Earth asteroid 162173 Ryugu were collected and successfully returned to the Earth in the Hayabusa2 mission…”
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The spatial distribution of impact craters on Ryugu
Published in Icarus (New York, N.Y. 1962) (01-03-2020)“…Asteroid 162173 Ryugu has numerous craters. The initial measurement of impact craters on Ryugu, by Sugita et al. (2019), is based on Hayabusa2 ONC images…”
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Geometric correction for thermographic images of asteroid 162173 Ryugu by TIR (thermal infrared imager) onboard Hayabusa2
Published in Earth, planets, and space (26-05-2021)“…The thermal infrared imager (TIR) onboard the Hayabusa2 spacecraft performed thermographic observations of the asteroid 162173 Ryugu (1999 JU 3 ) from June…”
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Thermal Imaging Performance of TIR Onboard the Hayabusa2 Spacecraft
Published in Space science reviews (01-07-2017)“…The thermal infrared imager (TIR) is a thermal infrared camera onboard the Hayabusa2 spacecraft. TIR will perform thermography of a C-type asteroid, 162173…”
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Development of Numerical Model of the Thermal State of an Asteroid with Locally Rough Surface and Its Application
Published in International journal of thermophysics (01-07-2022)“…We present a numerical method for simulating a disk-resolved thermal image of an asteroid with small-scale roughness. In our method, we carry out numerical…”
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Hayabusa2 Landing Site Selection: Surface Topography of Ryugu and Touchdown Safety
Published in Space science reviews (01-10-2020)“…One of the primary goals of Hayabusa2 is to land on the asteroid Ryugu to collect its surface materials. The key for a successful touchdown is to find a…”
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PAHs, Hydrocarbons, and Dimethylsulfides in Asteroid Ryugu Samples A0106 and C0107 and the Orgueil (CI1) Meteorite
Published in Earth, planets, and space (27-02-2023)“…Evaluating the molecular distribution of organic compounds in pristine extraterrestrial materials is cornerstone to understanding the abiotic synthesis of…”
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A newly revised estimation of bulk densities and examination of the shape of individual Ryugu grains
Published in Earth, planets, and space (01-12-2023)“…The bulk density of grains from a celestial body is a fundamental property related to its composition and structure, contributing to the understanding of its…”
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Visualization of nanoscale magnetic domain states in the asteroid Ryugu
Published in Scientific reports (29-08-2023)“…In the samples collected from the asteroid Ryugu, magnetite displays natural remanent magnetization due to nebular magnetic field, whereas contemporaneously…”
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