Search Results - "Morota, T."

Size–frequency measurements of meter-sized craters and boulders in the lunar polar regions for landing-site selections of future lunar polar missions by Kawashima, O., Morota, T., Ohtake, M., Kasahara, S.

“…The concentrations of volatiles, especially hydrogen (or water), at the lunar poles have been reported from remote sensing data in previous studies. Many…”
Get full text

Preflight Calibration Test Results for Optical Navigation Camera Telescope (ONC-T) Onboard the Hayabusa2 Spacecraft by Kameda, S., Suzuki, H., Takamatsu, T., Cho, Y., Yasuda, T., Yamada, M., Sawada, H., Honda, R., Morota, T., Honda, C., Sato, M., Okumura, Y., Shibasaki, K., Ikezawa, S., Sugita, S.

“…The optical navigation camera telescope (ONC-T) is a telescopic framing camera with seven colors onboard the Hayabusa2 spacecraft launched on December 3, 2014…”
Get full text

Numerical simulations suggest asteroids (101955) Bennu and (162173) Ryugu are likely second or later generation rubble piles by Walsh, K. J., Ballouz, R-L., Bottke, W. F., Avdellidou, C., Connolly Jr, H. C., Delbo, M., DellaGiustina, D. N., Jawin, E. R., McCoy, T., Michel, P., Morota, T., Nolan, M. C., Schwartz, S. R., Sugita, S., Lauretta, D. S.

“…Rubble pile asteroids are widely understood to be composed of reaccumulated debris following a catastrophic collision between asteroids in the main asteroid…”
Get full text

Massive layer of pure anorthosite on the Moon by Yamamoto, S., Nakamura, R., Matsunaga, T., Ogawa, Y., Ishihara, Y., Morota, T., Hirata, N., Ohtake, M., Hiroi, T., Yokota, Y., Haruyama, J.

“…We present a new global survey of the purest anorthosite (PAN) rock using the Spectral Profiler onboard Kaguya. We found that PAN rocks are widely distributed…”
Get full text

Initial inflight calibration for Hayabusa2 optical navigation camera (ONC) for science observations of asteroid Ryugu by Suzuki, H., Yamada, M., Kouyama, T., Tatsumi, E., Kameda, S., Honda, R., Sawada, H., Ogawa, N., Morota, T., Honda, C., Sakatani, N., Hayakawa, M., Yokota, Y., Yamamoto, Y., Sugita, S.

“…•Optical calibrations based on actual flight data of celestial bodies are performed.•A unique method using lunar radiance models is performed for a calibration…”
Get full text

Lunar Low‐Titanium Magmatism During Ancient Expansion Inferred From Ejecta Originating From Linear Gravity Anomalies by Nishiyama, G., Morota, T., Namiki, N., Inoue, K., Sugita, S.

“…Linear gravity anomalies (LGAs) on the Moon have been interpreted as ancient magmatic intrusions formed during the lunar expansion. The composition of such…”
Get full text

Particle size distributions inside and around the artificial crater produced by the Hayabusa2 impact experiment on Ryugu by Ogawa, K., Sakatani, N., Kadono, T., Arakawa, M., Honda, R., Wada, K., Shirai, K., Shimaki, Y., Ishibashi, K., Yokota, Y., Saiki, T., Imamura, H., Tsuda, Y., Nakazawa, S., Takagi, Y., Hayakawa, M., Yano, H., Okamoto, C., Iijima, Y., Morota, T., Kameda, S., Tatsumi, E., Cho, Y., Yoshioka, K., Sawada, H., Matsuoka, M., Yamada, M., Kouyama, T., Suzuki, H., Honda, C., Sugita, S.

“…Japanese Hayabusa2 spacecraft has successfully carried out an impact experiment using a small carry-on impactor (SCI) on an asteroid (162173) Ryugu. We examine…”
Get full text

A new type of pyroclastic deposit on the Moon containing Fe-spinel and chromite by Yamamoto, S., Nakamura, R., Matsunaga, T., Ogawa, Y., Ishihara, Y., Morota, T., Hirata, N., Ohtake, M., Hiroi, T., Yokota, Y., Haruyama, J.

“…We present details of the identification of sites that show an absorption band at visible wavelengths and a strong 2 μm band using the SELENE Spectral…”
Get full text

Surface roughness of asteroid (162173) Ryugu and comet 67P/Churyumov–Gerasimenko inferred from in situ observations by Otto, K A, Matz, K-D, Schröder, S E, Parekh, R, Krohn, K, Honda, R, Kameda, S, Jaumann, R, Schmitz, N, Stephan, K, Sugita, S, Tatsumi, E, Ho, T-M, Koncz, A, Trauthan, F, Cho, Y, Hayakawa, M, Honda, C, Kouyama, T, Matsuoka, M, Morota, T, Mottola, S, Ogawa, K, Preusker, F, Sakatani, N, Sawada, H, Scholten, F, Suzuki, H, Yamada, M, Yokota, Y, Yoshioka, K

“…ABSTRACT Alteration processes on asteroid and comet surfaces, such as thermal fracturing, (micrometeorite) impacts or volatile outgassing, are complex…”
Get full text

Geologic History and Crater Morphology of Asteroid (162173) Ryugu by Cho, Y., Morota, T., Kanamaru, M., Takaki, N., Yumoto, K., Ernst, C. M., Hirabayashi, M., Barnouin, O. S., Tatsumi, E., Otto, K. A., Schmitz, N., Wagner, R. J., Jaumann, R., Miyamoto, H., Kikuchi, H., Hemmi, R., Honda, R., Kameda, S., Yokota, Y., Kouyama, T., Suzuki, H., Yamada, M., Sakatani, N., Honda, C., Hayakawa, M., Yoshioka, K., Matsuoka, M., Michikami, T., Hirata, N., Sawada, H., Ogawa, K., Sugita, S.

“…Crater morphology and surface age of asteroid (162173) Ryugu are characterized using the high‐resolution images obtained by the Hayabusa2 spacecraft. Our…”
Get full text

Detectability of hydrous minerals using ONC-T camera onboard the Hayabusa2 spacecraft by Kameda, S., Suzuki, H., Cho, Y., Koga, S., Yamada, M., Nakamura, T., Hiroi, T., Sawada, H., Honda, R., Morota, T., Honda, C., Takei, A., Takamatsu, T., Okumura, Y., Sato, M., Yasuda, T., Shibasaki, K., Ikezawa, S., Sugita, S.

“…The Hayabusa2 spacecraft has three framing cameras (ONC-T, ONC-W1, and ONC-W2) for optical navigation to asteroid 1999 JU3. The ONC-T is a telescopic camera…”
Get full text

The widespread occurrence of high-calcium pyroxene in bright-ray craters on the Moon and implications for lunar-crust composition by Ogawa, Y., Matsunaga, T., Nakamura, R., Saiki, K., Ohtake, M., Hiroi, T., Takeda, H., Arai, T., Yokota, Y., Yamamoto, S., Hirata, N., Sugihara, T., Sasaki, S., Haruyama, J., Morota, T., Honda, C., Demura, H., Kitazato, K., Terazono, J., Asada, N.

“…We investigated the continuous spectral features of fresh craters on the Moon accompanied by distinctive bright rays, with cavity diameters between 8 and 24…”
Get full text

Variation of the lunar highland surface roughness at baseline 0.15-100 km and the relationship to relative age by Yokota, Y., Gwinner, K., Oberst, J., Haruyama, J., Matsunaga, T., Morota, T., Noda, H., Araki, H., Ohtake, M., Yamamoto, S., Gläser, P., Ishihara, Y., Honda, C., Hirata, N., Demura, H.

“…We report the surface roughness analysis of the lunar highlands for the baseline range 0.15–100 km. We use the Median Differential Slope αm to investigate the…”
Get full text

Featureless spectra on the Moon as evidence of residual lunar primordial crust by Yamamoto, S., Nakamura, R., Matsunaga, T., Ogawa, Y., Ishihara, Y., Morota, T., Hirata, N., Ohtake, M., Hiroi, T., Yokota, Y., Haruyama, J.

“…We report the global distribution of areas exhibiting no absorption features (featureless or FL) on the lunar surface, based on the reflectance spectral data…”
Get full text

Planned radiometrically calibrated and geometrically corrected products of lunar high-resolution Terrain Camera on SELENE by Haruyama, J., Ohtake, M., Matsunaga, T., Morota, T., Yokota, Y., Honda, C., Hirata, N., Demura, H., Iwasaki, A., Nakamura, R., Kodama, S.

“…Surface relief maps have a significant role in the investigation of the solid planets. A 10 m resolution stereoscopic push-broom imager called the Terrain…”
Get full text

Global occurrence trend of high-Ca pyroxene on lunar highlands and its implications by Yamamoto, S., Nakamura, R., Matsunaga, T., Ogawa, Y., Ishihara, Y., Morota, T., Hirata, N., Ohtake, M., Hiroi, T., Yokota, Y., Haruyama, J.

“…We present details of the global distribution of high‐Ca pyroxene (HCP)‐rich sites in the lunar highlands based on the global data set of hyperspectral…”
Get full text

Validation of Frame-Transfer Correction of SELENE/LISM/MI by Takayama, T., Iwasaki, A., Yokota, Y., Morota, T., Haruyama, J., Matsunaga, T., Ohtake, M.

“…Since the visible detector of the Multiband Imager (MI) of the Lunar Imager/Spectrometer mounted on the Selenological and Engineering Explorer operates in a…”
Get full text

Influence of the asymmetrical cratering rate on the lunar cratering chronology by Morota, Tomokatsu, Ukai, Takashi, Furumoto, Muneyoshi

“…The lunar cratering rate studied over the past 1.1 Gyr, which is a foundation of the lunar cratering chronology, is a decreasing function of the angular…”
Get full text

Valve-sparing aortic root replacement for young female patients with Marfan syndrome by Nawata, Kan, Morota, T

“…Annuloaortic ectasia is frequently related with Marfan syndrome, and Bentall procedure or aortic root replacement with valved conduit has been the conventional…”
Get more information

A simple modification of ‘David-V’ aortic root reimplantation by Takamoto, Shinichi, Nawata, Kan, Morota, Tetsuro

“…Valve-sparing aortic root reimplantation with creation of Dacron graft pseudosinuses is a popular and promising surgical choice for annuloaortic ectasia or…”
Get full text