Search Results - "Yanagisawa, Masahisa"

Radiative characteristics of the Chelyabinsk superbolide by Yanagisawa, Masahisa

“…On Feb. 15, 2013, a meteoroid with a size of about 19m plunged into the terrestrial atmosphere at 19kms−1 and burst at an altitude of about 30km over the city…”
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A low-dispersion spectral video camera for observing lunar impact flashes by Yanagisawa, Masahisa, Kakinuma, Fumihiro

“…An impact of a meteoroid on the lunar surface at speeds exceeding several kilometers per second generates a light flash generally less than 0.1 s in duration…”
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Analysis of the First Optical Detection of a Meteoroidal Impact on the Lunar Surface Recorded from Brazil by Duarte Cavalcante Pinto, David, Yanagisawa, Masahisa, Zurita, Marcelo Luiz do Prado Villarroel, Caldas, Romualdo Arthur Alencar, Domingues, Marcelo, Costa, Rafaela Lisboa, da Rocha Júnior, Rodrigo Lins, dos Santos Silva, Fabrício Daniel, Gomes, Heliofábio Barros, Gomes, Helber Barros, de Melo, Maria Luciene Dias, de Morais Teixeira, Lucas, da Silva Júnior, Ernande Roberto, Junior, Neftali Dias Cavalcante, Herdies, Dirceu Luís

“…Two lunar flashes are reported and fully analyzed, with one of them fulfilling every criterion preconized in the literature for the characterization of an…”
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Lightcurves of 1999 Leonid Impact Flashes on the Moon by Yanagisawa, Masahisa, Kisaichi, Narumi

“…Optical flashes observed on the night side of the Moon during the 1999 Leonid meteor shower have attracted the interest of astronomers. These flashes are…”
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The first confirmed Perseid lunar impact flash by Yanagisawa, Masahisa, Ohnishi, Kouji, Takamura, Yuzaburo, Masuda, Hiroshi, Sakai, Yoshihito, Ida, Miyoshi, Adachi, Makoto, Ishida, Masayuki

“…The first confirmed lunar impact flash due to a non-Leonid meteoroid is reported. The observed Perseid meteoroid impact occurred at 18 h28 m27 s on August 11,…”
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SuprimeCam Observation of Sporadic Meteors during Perseids 2004 by Iye, Masanori, Tanaka, Mikito, Yanagisawa, Masahisa, Ebizuka, Noboru, Ohnishi, Kouji, Hirose, Chikako, Asami, Naoko, Komiyama, Yutaka, Furusawa, Hisanori

“…We report on serendipitous findings of 13 faint meteors and 44 artificial space objects by SuprimeCam imaging observations during 2004 August 11–16. The…”
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An experimental study of the impact flash: The relationship between luminous efficiency and vacuum level by Fuse, Ryota, Abe, Shinsuke, Yanagisawa, Masahisa, Hasegawa, Sunao

“…When a meteoroid impacts on the Moon, a brief flash phenomenon—called a “lunar impact flash”—can be observed by ground-based telescopes. The statistics of…”
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Angular momentum transfer in oblique impacts : Implications for 1989ML by YANAGISAWA, M, HASEGAWA, S

“…We conducted 10 shots of high-velocity oblique impact experiments (1.95–3.52 km/s) using nylon projectiles and spherical mortar targets. Large craters were…”
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Low dispersion spectra of lunar impact flashes in 2018 Geminids by Yanagisawa, Masahisa, Uchida, Yuki, Kurihara, Seiya, Abe, Shinsuke, Fuse, Ryota, Tanaka, Satoshi, Onodera, Keisuke, Yoshida, Fumi, Chi, Hsin-Chang, Lin, Zhong-Yi, Lee, Jim, Kawamura, Taichi, Yamada, Ryuhei

“…Lunar impact flashes have been observed at collisions of meteoroids against the non-sunlit lunar surface at speeds exceeding 10 ​km ​s−1. We detected 13 flash…”
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Momentum and Angular Momentum Transfer in Oblique Impacts: Implications for Asteroid Rotations by Yanagisawa, Masahisa, Hasegawa, Sunao, Shirogane, Nobutoshi

“…We conducted a series of high velocity oblique impact experiments (0.66–6.7 km/s) using polycarbonate (plastic) projectiles and targets made of mortar,…”
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Collisional Spin Up of Nonspherical Asteroids by Yanagisawa, Masahisa

“…We investigate the spin up of nonspherical asteroids by successive random collisions with other smaller asteroids. The spin-up rates are calculated for…”
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Momentum Transfer in Oblique Impacts: Implications for Asteroid Rotations by Yanagisawa, Masahisa, Hasegawa, Sunao

“…We calculate the momentum transfer efficiency for small cratering impacts from 59 high-velocity (0.76–4.4 km/s) oblique impact experiments using nylon…”
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Rb-Sr and 40Ar-39Ar geochronological studies on the Precambrian rocks in the Minnesota River Valley by Tsunakawa, Hideo, Yanagisawa, Masahisa

“…Some granitic rocks and basaltic dikes of the Minnesota River Valley were dated by Rb-Sr and 40Ar-39Ar methods. The obtained Rb-Sr mineral isochron ages are as…”
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Upper limits of Europa brightening at K-nucleus impact by Yanagisawa, Masahisa

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Stable and reproducible production of high velocity projectile in ISAS railgun (HYPAC) by Kawashima, N., Yamori, A., Yanagisawa, M., Kubo, H., Kohno, M., Teii, S.

“…The ISAS (Institute of Space and Astronautical Science) railgun HYPAC (power supply: 6 mF, 10 kV, 300 kJ; rail: 13 mm phi *2 m bore) has been developed with a…”
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Stable and reproducible production of high velocity projectile in ISAS railgun (HYPAC) by Kawashima, Nobuki, Yamori, Akira, Yanagisawa, Masahisa, Kubo, Haruya, KOHNO, MIGIWA, TEII, SHINRIKI

“…The development of Japan's HYPAC railgun has emphasized the achievement of highly stable and reproducible projectile velocities for planetary impact-phenomenon…”
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Rail gun experiment (HYPAC) at ISAS (meteorite impact simulation) by Yamori, A., Yanagisawa, M., Sato, K., Kawashima, N., Furukawa, T., Teii, S.

“…A railgun for the study of the interaction of meteorites with planetary surfaces and the interaction of space debris was developed. The authors have attained a…”
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Development of railgun accelerator at ISAS by Yanagisawa, M., Sato, K., Yamori, A., Kawashima, N.

“…A square-bore railgun accelerator system is described in which energy stored in capacitor banks (300 kJ maximum) is supplied to a railgun through a pulse…”
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An upper limit of visible emission from the plume generated by the impact of the K fragment of SL9 by Yanagisawa, Masahisa, Tanaka, Satoshi, Okada, Tatsuaki, Konno, Tatsuo

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Space plasma physics: space experiments with particle accelerators by Obayashi, T, Kawashima, N, Kuriki, K, Nagatomo, M, Ninomiya, K, Sasaki, S, Yanagisawa, M, Kudo, I, Ejiri, M, Roberts, W T, Chappell, C R, Reasoner, D L, Burch, J L, Taylor, W L, Banks, P M, Williamson, P R, Garriott, O K

“…Electron and plasma beams and neutral gas plumes were injected into the space environment by instruments on Spacelab 1, and various diagnostic measurements…”
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