Search

Your search keyword '"1999 JU3"' showing total 7 results
Start Over Descriptor "1999 JU3"
7 results on '"1999 JU3"'

1. Investigation of Thermal Inertia and Surface Properties for Near-earth Asteroid (162173) 1999 JU3.

Author

Liang-liang, YU, Jiang-hui, JI, and Su, WANG

Subjects
*THERMAL properties, *DISTRIBUTION (Probability theory), *ASTEROIDS, *NUMERICAL analysis, *INERTIA (Mechanics)
Abstract

In order to obtain the substantial information about the surface physics and thermal property of the target asteroid (162173) 1999 JU3, which will be visited by Hayabusa 2 in a sample return mission, with the Advanced Thermal Physical Model (ATPM) we estimate the possible thermal inertia distribution over its surface, and infer the major material composition of its surface materials. In addition, the effective diameter and geometric albedo are derived to be Deff=1.13±0.03 km, pv=0.042±0.003, respectively, and the average thermal inertia is estimated to be about (300 ± 50) J m-2 s-0.5 K-1 According to the derived thermal inertia distribution, we infer that the major area on the surface of the target asteroid may be covered by loose materials, such as rock debris, sands, and so on, but few bare rocks may exist in a very small region. In this sense, the sample return mission of Hayabusa 2 is feasible, when it is performed successfully, it will certainly bring significant scientific information to the research of asteroids. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

2. Small carry-on impactor of Hayabusa2 mission

Author

Saiki, Takanao, Sawada, Hirotaka, Okamoto, Chisato, Yano, Hajime, Takagi, Yasuhiko, Akahoshi, Yasuhiro, and Yoshikawa, Makoto

Subjects
*SPACE vehicles, *HAYABUSA (Fighter plane), *ASTEROIDS, *SYSTEMS design, *SPACE debris
Abstract

Abstract: A Japanese spacecraft, Hayabusa2, the successor of Hayabusa, which came back from the Asteroid Itokawa with sample materials after its 7-year-interplanetary journeys, is a current mission of Japan Aerospace Exploration Agency (JAXA) and scheduled to be launched in 2014. Although its design basically follows Hayabusa, some new components are planned to be equipped in Hayabusa2 mission. A Small Carry-on Impactor (SCI), a small explosive device, is one of the challenges that were not seen with Hayabusa. An important scientific objective of Hayabusa2 is to investigate chemical and physical properties of the internal materials and structures. SCI creates an artificial crater on the surface of the asteroid and the mother spacecraft observes the crater and tries to get sample materials. High kinetic energy is required to creating a meaningful crater. The SCI would become complicated and heavy if the traditional acceleration devices like thrusters and rocket motors are used to hit the asteroid because the acceleration distance is quite large and guidance system is necessary. In order to make the system simpler, a technology of special type of shaped charge is used for the acceleration of the impact head. By using this technology, it becomes possible to accelerate the impact head very quickly and to hit the asteroid without guidance system. However, the impact operation should be complicated because SCI uses powerful explosive and it scatters high speed debris at the detonation. This paper presents the overview of our new small carry-on impact system and the impact operation of Hayabusa2 mission. [Copyright &y& Elsevier]

Published
2013
Full Text
View/download PDF

3. Hayabusa2 Sample Catcher and Container: Metal-Seal System for Vacuum Encapsulation of Returned Samples with Volatiles and Organic Compounds Recovered from C-Type Asteroid Ryugu

Author

Okazaki, Ryuji, Sawada, Hirotaka, Yamanouchi, Shinji, Tachibana, Shogo, Miura, Yayoi N., Sakamoto, Kanako, Takano, Yoshinori, Abe, Masanao, Itoh, Shoichi, Yamada, Keita, Yabuta, Hikaru, Okamoto, Chisato, Yano, Hajime, Noguchi, Takaaki, Nakamura, Tomoki, Nagao, Keisuke, and The Hayabusa2 SMP Team

Published
2017
Full Text
View/download PDF

5. Thermal Imaging Performance of TIR Onboard the Hayabusa2 Spacecraft

Author

Y. Horikawa, Satoshi Tanaka, Hirohide Demura, Tatsuaki Okada, Naoya Sakatani, Tetsuya Fukuhara, Yoshiko Ogawa, Tomoki Nakamura, Hiroki Senshu, and Takehiko Arai

Subjects
010504 meteorology & atmospheric sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Optics, Surface roughness, 0103 physical sciences, Thermal, Emissivity, Black-body radiation, Ryugu, 010303 astronomy & astrophysics, Thermal inertia, 0105 earth and related environmental sciences, Physics, business.industry, Asteroid, Carbonaceous chondrite, Order (ring theory), Thermal emissivity, Astronomy and Astrophysics, Atmospheric temperature range, Infrared camera, Computational physics, TIR, Planck's law, Space and Planetary Science, Thermography, business, 1999 JU3, Hayabusa2
Abstract

Accepted: 2017-03-15, 資料番号: SA1170013000

Published
2017

6. Hayabusa2 Sample Catcher and Container: Metal-Seal System for Vacuum Encapsulation of Returned Samples with Volatiles and Organic Compounds Recovered from C-Type Asteroid Ryugu

Author

Yamanouchi, Shinji, Itoh, Shoichi, Yamada, Keita, The, Hayabusa2 SMP Team, Okazaki, Ryuji, Sawada, Hirotaka, Tachibana, Shogo, Miura, Yayoi N., Sakamoto, Kanako, Takano, Yoshinori, Abe, Masanao, Yabuta, Hikaru, Okamoto, Chisato, Yano, Hajime, Noguchi, Takaaki, Nakamura, Tomoki, and Nagao, Keisuke

Subjects
chemistry.chemical_classification, 010504 meteorology & atmospheric sciences, Waste management, Metal seal, Terrestrial alteration, Astronomy and Astrophysics, Contamination, Sample return, 010502 geochemistry & geophysics, 01 natural sciences, Astrobiology, Noble gases, chemistry, Space and Planetary Science, Asteroid, Environmental science, Organic matter, 1999 JU3, 162173 Ryugu, 0105 earth and related environmental sciences, Aluminum metal, Hayabusa2
Abstract

著者人数: 16名ほか, Accepted: 2016-09-08, 資料番号: SA1160332000

Published
2017

7. Asteroid Ryugu Before the Hayabusa2 Encounter

Author

Wada, Koji, Grott, Matthias, Michel, Patrick, Walsh, Kevin J., Barucci, Antonella, Biele, Jens, Blum, Jürgen, Ernst, Carolyn M., Grundmann, Jan Thimo, Gundlach, Bastian, Hagermann, Axel, Hamm, Maximilian, Jutzi, Martin, Kim, Myung-Jin, Kührt, Ekkehard, Le Corre, Lucille, Libourel, Guy, Lichtenheldt, Roy, Maturilli, Alessandro, Messenger, Scott R., Michikami, Tatsuhiro, Miyamoto, Hideaki, Mottola, Stefano, Müller, Thomas, Nakamura, Akiko M., Nittler, Larry R., Ogawa, Kazunori, Okada, Tatsuaki, Palomba, Ernesto, Sakatani, Naoya, Schröder, Stefan, Senshu, Hiroki, Takir, Driss, Zolensky, Michael E., International Regolith Science Group (IRSG) in Hayabusa2 project, n/a, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Dept of Archaeology, University of York [York, UK], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), German Aerospace Center (DLR), Technische Universität Braunschweig [Braunschweig], DLR Institute of Space Systems, Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), The Open University [Milton Keynes] (OU), DLR Institut für Planetenforschung, Department of Astronomy, Yonsei University, Laboratoire de Planétologie et Géodynamique UMR6112 (LPG), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Université d'Angers (UA), University of Bristol [Bristol], DLR Institute of Planetary Research, Institut für Algorithmen und Kognitive Systeme (IAKS), Karlsruher Institut für Technologie (KIT), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Astromaterials Research and Exploration Science (ARES), NASA Johnson Space Center (JSC), NASA-NASA, Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), and Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Asteroiden und Kometen, near Earth Asteroid (NEA), Solar System, 010504 meteorology & atmospheric sciences, Computer science, FOS: Physical sciences, Sample (statistics), 01 natural sciences, Regolith, Sample return mission, Planetenphysik, 0103 physical sciences, Ryugu, Aerospace engineering, C-type Asteroid, Biogeosciences, Aerospace, 010303 astronomy & astrophysics, Reference model, JAXA, 0105 earth and related environmental sciences, Earth and Planetary Astrophysics (astro-ph.EP), Physical properties, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], business.industry, 520 Astronomy, Asteroid, lcsh:QE1-996.5, lcsh:Geography. Anthropology. Recreation, Systementwicklung und Projektbüro, Asteroid reference model, 620 Engineering, Asteroids, lcsh:Geology, Planetary science, lcsh:G, ground-based observations, General Earth and Planetary Sciences, business, 1999 JU3, Hayabusa2, Astrophysics - Earth and Planetary Astrophysics
Abstract

Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA). Ground-based observations indicate that Ryugu is a C-type near-Earth asteroid with a diameter of less than 1 km, but the knowledge of its detailed properties is still very limited. This paper summarizes our best understanding of the physical and dynamical properties of Ryugu based on remote sensing and theoretical modeling. This information is used to construct a design reference model of the asteroid that is used for formulation of mission operations plans in advance of asteroid arrival. Particular attention is given to the surface properties of Ryugu that are relevant to sample acquisition. This reference model helps readers to appropriately interpret the data that will be directly obtained by Hayabusa2 and promotes scientific studies not only for Ryugu itself and other small bodies but also for the Solar System evolution that small bodies shed light on., 62 pages, 10 figures, 8 tables. Submitted to Space Science Reviews, on 6 April 2018

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results