HASEGAWA Sunao

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Name
HASEGAWA Sunao
Affiliation
Japan Aerospace Exploration Agency
Section
Institute of Space and Astronautical Science
ORCID ID
0000-0001-6366-2608

Research Areas

 
 

Published Papers

 
Icarus      Feb 2019   [Refereed]
The impact of meteorites forms craters on celestial surfaces, below which cracks are formed. Lunar geological conditions around such craters have been estimated based on permittivity surveys by radar exploration. The relationship between density a...
Science      Apr 2019   [Refereed]
The near-Earth carbonaceous asteroid 162173 Ryugu is thought to have been produced from a parent body that contained water ice and organic molecules. The Hayabusa2 spacecraft has obtained global multicolor images of Ryugu. Geomorphological feature...
Publications of the Astronomical Society of Japan      Jan 2019   [Refereed]
Knowledge of water in the solar system is important for the understanding of a wide range of evolutionary processes and the thermal history of the solar system. To explore the existence of water in the solar system, it is indispensable to investig...
Publications of the Astronomical Society of Japan      Dec 2018   [Refereed]
Sample return from the near-Earth asteroid known as 25143 Itokawa was conducted as part of the Hayabusa mission, with a large number of scientific findings being derived from the returned samples. Following the Hayabusa mission, Hayabusa2 was plan...
Planetary and Space Science      Nov 2018   [Refereed]
We carried out impact experiments using cylindrical gypsum targets with various radii and investigated the crater on the top (flat) surface. At a ratio of projectile and target radii ∼1/20, the crater size abruptly increases; the spallation extend...
Progress in Earth and Planetary Science      Nov 2018   [Refereed]
In the publication of this article (Nagaashi et al., 2018), there was an error in eqs. (7) and (10)....
Kebukawa Y, Okudaira K, Yabuta H, Hasegawa S, Tabata M, Furukawa Y, Ito M, Nakato A, David Kilcoyne A.L, Kobayashi K, Yokobori S.-I, Imai E, Kawaguchi Y, Yano H, Yamagishi A.
Geochemical Journal   53(1) 53-67   2019   [Refereed]
Progress in Earth and Planetary Science      Sep 2018   [Refereed]
Inelastic collisions occur among regolith particles, such as those in the ejecta curtain from a crater, and may cause clustering or agglomeration of particles and thus produce discrete patterns of ejecta deposits around a crater. Previous studies ...
Transactions of The Japan Society For Aeronautical and Space Sciences, Aerospace Technology Japan      2019   [Refereed]
Astronomy and Astrophysics      May 2018   [Refereed]
The AKARI IRC all-sky survey provided more than twenty thousand thermal infrared observations of over five thousand asteroids. Diameters and albedos were obtained by fitting an empirically calibrated version of the standard thermal model to these ...
Astronomy and Astrophysics      Mar 2018   [Refereed]
We present a unique and significant polarimetric result regarding the near-Earth asteroid (152679) 1998 KU2, which has a very low geometric albedo. From our observations, we find that the linear polarization degrees of 1998 KU2</SU...
Icarus      Mar 2018   [Refereed]
We investigated impact crater structures on regolith particles from asteroid Itokawa using scanning electron microscopy. We observed the surfaces of 51 Itokawa particles, ranging from 15 μm to 240 μm in size. Craters with average diameters ranging...
Icarus      Mar 2018   [Refereed]
In 2010, fine regolith particles on asteroid Itokawa were recovered by the Hayabusa mission. The three-dimensional microstructure of 48 Itokawa particles smaller than 120 μm was examined in previous studies. The shape distribution of Itokawa parti...
Icarus      Feb 2018   [Refereed]
Impact-cratering processes on small bodies are thought to be mainly controlled by the local material strength because of their low surface gravity, and craters that are as large as the parent bodies should be affected by the target curvature. Alth...
arXiv e-prints      Feb 2018   [Refereed]
The asteroid (25143) Itokawa is a target object of the Japanese sample return mission, HAYABUSA. We have observed Itokawa in optical wave- length (R-band) with the 1.05-m Schmidt telescope at the Kiso Observatory, the 2.24-m telescope of Universit...
遊・星・人 : 日本惑星科学会誌      2018   [Refereed]
Publications of the Astronomical Society of Japan      Dec 2017   [Refereed]
In the 1-2.5 μm range, spectroscopic observations are made on the AcuA-spec asteroids, the spectra of which were obtained in a continuous covered mode between 2.5-5.0 μm by AKARI. Based on the Bus-DeMeo taxonomy (DeMeo et al. 2009, Icarus, 202, 16...
The Astronomical Journal      Nov 2017   [Refereed]
We conducted a polarimetric observation of the fast-rotating near-Earth asteroid (1566) Icarus at large phase (Sun-asteroid-observer’s) angles α = 57°-141° around the 2015 summer solstice. We found that the maximum values of the linear polarizatio...
Space Science Reviews      Jul 2017   [Refereed]
The thermal infrared imager TIR onboard Hayabusa2 has been developed to investigate thermo-physical properties of C-type, near-Earth asteroid 162173 Ryugu. TIR is one of the remote science instruments on Hayabusa2 designed to understand the nature...
Space Science Reviews      Jul 2017   [Refereed]
Japan Aerospace Exploration Agency (JAXA) launched the asteroid exploration probe "Hayabusa2" in December 3rd, 2014, following the 1st Hayabusa mission. With technological and scientific improvements from the Hayabusa probe, we plan to visit the C...
Journal of Geophysical Research (Planets)      May 2017   [Refereed]
The present paper describes observations of crater growth for various impact velocities up to ̃6 km s-1. Spherical polycarbonate projectiles (4.76 mm) were impacted vertically into dry sand targets at impact velocities vi ran...
Astronomy and Astrophysics      Mar 2017   [Refereed]
Context. The JAXA Hayabusa2 mission will perform the first ever sample return from a primitive asteroid. The target near-Earth asteroid (162173) Ryugu will be reached in mid-2018 and its samples will be returned to the Earth by the end of 2020. <B...
Astronomy and Astrophysics      Mar 2017   [Refereed]
The JAXA Hayabusa-2 mission was approved in 2010 and launched on December 3, 2014. The spacecraft will arrive at the near-Earth asteroid 162173 Ryugu (1999 JU3) in 2018 where it will perform a survey, land and obtainsurface material, th...
Advances in Space Research      Mar 2017   [Refereed]
We describe data screening and reduction procedures for dust impact measurements performed by the Arrayed Large-Area Dust Detectors in INterplanetary space (ALADDIN) during its observation period of about 300 days in 2010-2011. The ALADDIN is a po...
Planetary and Space Science      Jan 2017   [Refereed]
Most impact craters observed on planetary bodies are the results of oblique impacts of meteoroids. To date, however, there have only been very few laboratory oblique impact experiments for analogue targets relevant to the surfaces of extraterrestr...
Kawai N, Kuroda Y, Nagano M, Hasegawa S, Sato E.
Procedia Engineering   204 255-261   2017   [Refereed]
Hirai T, Higashide M, Kurosaki H, Kawakita S, Hasegawa S, Mando Y, Yamaguchi S, Tanaka K.
Procedia Engineering   204 445-451   2017   [Refereed]
Ground-based and Airborne Instrumentation for Astronomy VI      Aug 2016   [Refereed]
MIMIZUKU is the first-generation mid-infrared instrument for the university of Tokyo Atacama Observatory (TAO) 6.5-m telescope. MIMIZUKU provides imaging and spectroscopic monitoring capabilities in a wide wavelength range from 2 to 38 μm, includi...
Icarus      Jan 2016   [Refereed]
Laboratory impact experiments have found that impact fragments tend to be elongated. Their shapes, as defined by axes a, b and c, these being the maximum dimensions of the fragment in three mutually orthogonal planes (a ⩾ b ⩾ c), are distributed a...
Transactions of the Japanese Society for Artificial Intelligence, Aerospace Technology Japan      2016   [Refereed]
The Astrophysical Journal      Dec 2015   [Refereed]
We conducted an optical and near-infrared polarimetric observation of the highly dormant Jupiter-Family Comet, 209P/LINEAR. Because of its low activity, we were able to determine the linear polarization degrees of the coma dust particles and nucle...
Planetary and Space Science      Nov 2015   [Refereed]
The authors regret that two errors have been found in the manuscript of Okamoto et al. (2014)....
Advances in Space Research      Aug 2015   [Refereed]
The in-situ debris environment awareness system has been developed. The objective of the system is to measure small debris (between 100 μm and several cm) in orbit. The orbital distribution and the size distribution of the debris are not well unde...
Journal of Geophysical Research (Planets)      Jul 2015   [Refereed]
A series of hypervelocity impact experiments was conducted in a new laboratory at Planetary Exploration Research Center of Chiba Institute of Technology (Japan). We present the results of high-speed imaging observations of impact jetting during bl...
Origins of Life and Evolution of the Biosphere      Jun 2015   [Refereed]
In order to investigate impact production of carbonaceous products by asteroids on Titan and other satellites and planets, simulation experiments were carried out using a 2-stage light gas gun. A small polycarbonate or metal bullet with about 6.5 ...
Planetary and Space Science      Mar 2015   [Refereed]
Small bodies were probably very porous during the formation of the solar system. To understand the evolution of such bodies, impact experiments on sintered glass-bead targets with porosities of 80%, 87%, and 94% were performed at velocities of 1.8...
The Astronomical Journal      Feb 2015   [Refereed]
Most outer main-belt asteroids have low albedos because of their carbonaceouslike bodies. However, infrared satellite surveys have revealed that some asteroids have high albedos, which may suggest the presence of unusual surface minerals for those...
The Astrophysical Journal      Jan 2015   [Refereed]
We report a new observation of the Jupiter family comet 209P/LINEAR during its 2014 return. The comet is recognized as a dust source of a new meteor shower, the May Camelopardalids. 209P/LINEAR was apparently inactive at a heliocentric distance r<...
遊・星・人 : 日本惑星科学会誌      2015   [Refereed]
日本航空宇宙学会論文集      2015   [Refereed]
遊・星・人 : 日本惑星科学会誌      2015   [Refereed]
遊・星・人 : 日本惑星科学会誌      2015   [Refereed]
遊・星・人 : 日本惑星科学会誌      2015   [Refereed]
Yanagisawa M, Kurosawa K, Hasegawa S.
Procedia Engineering   103 657-662   2015   [Refereed]
Kawai N, Zama S, Takemoto W, Moriguchi K, Arai K, Hasegawa S, Sato E.
Procedia Engineering   103 287-293   2015   [Refereed]
Kurihara M, Higashide M, Takayanagi Y, Arai K, Yano H, Tabata M, Hasegawa S, Yamagishi A.
Procedia Engineering   103 334-340   2015   [Refereed]
Nishida M, Hiraiwa Y, Hayashi K, Hasegawa S.
Procedia Engineering   103 444-449   2015   [Refereed]
Higashide M, Kusano T, Takayanagi Y, Arai K, Hasegawa S.
Procedia Engineering   103 189-196   2015   [Refereed]
Advances in Space Research      Oct 2014   [Refereed]
The cylindrical column of brittle material processed from soil and rock is a fundamental component of architectures on the surface of solid bodies in the solar system. One of the most hazardous events for the structure is damaging by hypervelocity...
Icarus      Oct 2014   [Refereed]
Iron meteorites and some M-class asteroids are generally understood to be fragments that were originally part of cores of differentiated planetesimals or part of local melt pools on primitive bodies. The parent bodies of iron meteorites may have f...
Planetary and Space Science      Oct 2014   [Refereed]
The Arrayed Large-Area Dust Detectors in INterplanetary space (ALADDIN) is an array of polyvinylidene fluoride (PVDF) based dust detectors aboard the solar power sail demonstrator named IKAROS (Interplanetary Kite-craft Accelerated by Radiation Of...
Publications of the Astronomical Society of Japan      Oct 2014   [Refereed]
We present the results of photometric observations carried out with four small telescopes of the asteroid 4 Vesta in the B, RC, and z ' bands at a minimum phase angle of 0.1°. The magnitudes, reduced to unit distance and zero phase angl...
The Astrophysical Journal      Sep 2014   [Refereed]
We investigated the magnitude-phase relation of (162173) 1999 JU3, a target asteroid for the JAXA Hayabusa 2 sample return mission. We initially employed the International Astronomical Union's H-G formalism but found that it fits less well using a...
Publications of the Astronomical Society of Japan      Jun 2014   [Refereed]
This paper provides a unique data set representing the taxonomic type of near-Earth asteroids (NEAs) accessible by available spacecraft. The research on NEAs has entered upon a new phase, thanks to sample-return space explorations together with st...
Publications of the Astronomical Society of Japan      Jun 2014   [Refereed]
The near-Earth asteroid (25143) Itokawa was characterized in great detail by the Japanese Hayabusa mission. We revisited the available thermal observations in the light of the true asteroid properties with the goal of evaluating the possibilities ...
Publications of the Astronomical Society of Japan      Jun 2014   [Refereed]
We observed the lightcurves of 13 V-type asteroids [(1933) Tinchen, (2011) Veteraniya, (2508) Alupka, (3657) Ermolova, (3900) Knezevic, (4005) Dyagilev, (4383) Suruga, (4434) Nikulin, (4796) Lewis, (6331) 1992 FZ1, (8645) 1998 TN, (1028...
Publications of the Astronomical Society of Japan      Jun 2014   [Refereed]
We present a comparative study of three infrared asteroid surveys based on the size and albedo data from the Infrared Astronomical Satellite (IRAS), the Japanese infrared satellite AKARI, and the Wide-field Infrared Survey Explorer (WISE). Our stu...
Origins of Life and Evolution of the Biosphere      Feb 2014   [Refereed]
We have proposed an experiment (the Tanpopo mission) to capture microbes on the Japan Experimental Module of the International Space Station. An ultra low-density silica aerogel will be exposed to space for more than 1 year. After retrieving the a...
遊・星・人 : 日本惑星科学会誌      2014   [Refereed]
Nozaki K, Nishida M, Hayashi K, Hasegawa S.
Applied Mechanics and Materials   566 338-343   2014   [Refereed]
Transactions of the Japanese Society for Artificial Intelligence, Aerospace Technology Japan      2014   [Refereed]
The Astrophysical Journal      Nov 2013   [Refereed]
A Jupiter-family comet, 17P/Holmes, underwent outbursts in 1892 and 2007. In particular, the 2007 outburst is known as the greatest outburst over the past century. However, little is known about the activity before the outburst because it was unpr...
Astronomy and Astrophysics      Oct 2013   [Refereed]
The near-Earth asteroid 308635 (2005 YU55) is a potentially hazardous asteroid which was discovered in 2005 and passed Earth on Nov. 8, 2011 at 0.85 lunar distances. This was the closest known approach by an asteroid of several hundred ...
6th European Conference on Space Debris      Aug 2013   [Refereed]
The effects of projectile impact velocity on ejecta fragment size were investigated by striking aluminum alloy 6061-T6 targets with 3.2-mm-diameter aluminum alloy 2017-T4 spheres at velocities ranging from 2 to 6 km/s. The two-stage light-gas gun ...
6th European Conference on Space Debris      Aug 2013   [Refereed]
...
The Astronomical Journal      Jul 2013   [Refereed]
Primitive, outer-belt asteroids are generally of low albedo, reflecting carbonaceous compositions like those of CI and CM meteorites. However, a few outer-belt asteroids having high albedos are known, suggesting the presence of unusually reflectiv...
Origins of Life and Evolution of the Biosphere      Jun 2013   [Refereed]
Cyanide compounds are amongst the most important molecules of the origin of life. Here, we demonstrate the importance of mid-size (0.1-1 km in diameter) hence frequent meteoritic impacts to the cyanide inventory on the early Earth. Subsequent aero...
Icarus      May 2013   [Refereed]
Small primitive bodies were presumably highly porous when they formed and some still have low densities that are indicative of a high pore content. Therefore, after their formation, interplanetary dust impacting on their surface may have been capt...
Publications of the Astronomical Society of Japan      Apr 2013   [Refereed]
We present an asteroidal catalog from the mid-infrared wavelength region using the slow-scan observation mode obtained by the Infrared Camera (IRC) on-board the Japanese infrared satellite AKARI. An archive of IRC slow-scan observations comprising...
The Astrophysical Journal      Jan 2013   [Refereed]
We present an analysis of the albedo properties of main belt asteroids (MBAs) detected by the All-Sky Survey of the infrared astronomical satellite AKARI. The characteristics of 5120 asteroids detected by the survey, including their sizes and albe...
Journal of Geophysical Research (Planets)      Jan 2013   [Refereed]
Phyllosilicates have been identified in some of the most highly cratered Noachian terrains on Mars. To study the effects of such impacts on the properties of phyllosilicates, we experimentally shocked six phyllosilicate minerals relevant to the Ma...
Nishida M, Kuzuya K, Hayashi K, Hasegawa S.
International Journal of Impact Engineering   54 161-176   2013   [Refereed]
Higashide M, Onose N, Hasegawa S.
Procedia Engineering   58 517-525   2013   [Refereed]
Kawai N, Tsurui K, Moriguchi K, Hasegawa S, Sato E.
Procedia Engineering   58 702-708   2013   [Refereed]
Icarus      Nov 2012   [Refereed]
In order to understand the penetration process of projectiles into lower-density targets, we carry out hypervelocity impact experiments using low-density (60 mg cm-3) aerogel targets and various types of projectiles, and observe the tra...
Icarus      Nov 2012   [Refereed]
Recent studies of impact craters formed on low-density asteroids led to the proposal of a new crater formation mechanism dominated by pore collapse and compaction. Thus, it is important to study the crater formation process associated with the pro...
Publication of Korean Astronomical Society      Nov 2012   [Refereed]
...
Journal of Geophysical Research (Planets)      Aug 2012   [Refereed]
We systematically conducted impact cratering experiments with sedimentary rocks at 0.8-7.1 km/s using various projectiles with 1.1-15 g/cm3 in density. The crater diameter, depth, and volume are investigated and compared with the result...
Earth and Planetary Science Letters      Jul 2012   [Refereed]
The shock-induced decarbonation of non-porous calcite was investigated in an open system over a wide range of peak shock pressures using a two-stage light gas gun and a quadrupole mass spectrometer. We developed a new experimental technique that a...
The Astronomical Journal      Jun 2012   [Refereed]
We present a study of 107 Cybele asteroids based on the archival database "Asteroid Catalog Using AKARI (AcuA)" taken by the Infrared Astronomical Satellite. The database provides diameters D &gt; 10 km, geometric albedos, and taxonomic informatio...
Asteroids, Comets, Meteors 2012      May 2012   [Refereed]
Lightcurves of 20 V-type asteroids and 13 asteroids are by-productions for V-type asteroid observations have been obtained. We have determined rotation periods of 18 V-type asteroids and 11 non V-type asteroids....
Icarus      Apr 2012   [Refereed]
To clarify the effect of a surface regolith layer on the formation of craters in bedrock, we conducted impact-cratering experiments on two-layered targets composed of a basalt block covered with a mortar layer. A nylon projectile was impacted on t...
The Astrophysical Journal      Feb 2012   [Refereed]
An inner main-belt asteroid, P/2010 A2, was discovered on 2010 January 6. Based on its orbital elements, it is considered that the asteroid belongs to the Flora collisional family, where S-type asteroids are common, while showing a comet-like dust...
The Astrophysical Journal      Jan 2012   [Refereed]
A large number of cometary dust particles were captured with low-density silica aerogel during the NASA Stardust mission. The dust particles penetrated into the aerogel and formed various track shapes. To estimate the properties of the dust partic...
航空宇宙技術      2012   [Refereed]
Transactions of the Japanese Society for Artificial Intelligence, Aerospace Technology Japan      2012   [Refereed]
Journal of the Japanese Society for Experimental Mechanics      2012   [Refereed]
Transactions of the Japanese Society for Artificial Intelligence, Aerospace Technology Japan      2012   [Refereed]
Japanese Journal of Applied Physics      Dec 2011   [Refereed]
An impact production of carbon nanoclusters is carried out in nitrogen gas using a two-stage light-gas gun. A small polycarbonate ball (or a stainless steel ball) is injected at about 6.5 km/s into a pressurized target chamber to collide with an a...
The Astrophysical Journal      Nov 2011   [Refereed]
Strange-looking dust cloud around asteroid (596) Scheila was discovered on 2010 December 11.44-11.47. Unlike normal cometary tails, it consisted of three tails and faded within two months. We constructed a model to reproduce the morphology of the ...
The Astrophysical Journal      Oct 2011   [Refereed]
An unexpected outburst was observed around (596) Scheila in 2010 December. We observed (596) Scheila soon after the impact using ground-based telescopes. We succeeded in the detection of a faint linear tail after 2011 February, which provides a cl...
Publications of the Astronomical Society of Japan      Oct 2011   [Refereed]
We present the results of an unbiased asteroid survey in the mid-infrared wavelength region with the Infrared Camera (IRC) on board the Japanese infrared satellite AKARI. About 20% of the point source events recorded in the AKARI All-Sky Survey ob...
Icarus      Sep 2011   [Refereed]
We present lightcurve observations and multiband photometry for 107P/Wilson-Harrington using five small- and medium-sized telescopes. The lightcurve has shown a periodicity of 0.2979 day (7.15 h) and 0.0993 day (2.38 h), which has a commensurabili...