Hayabusa2 Mission Overview

Watanabe, S.; Tsuda, Yuichi; Yoshikawa, Makoto; Tanaka, Satoshi; Saiki, Takanao; Nakazawa, Shozo

doi:10.1007/978-94-024-1538-4_2

Cited by 22 publications

(31 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The MINERVA II consists of rovers that will be operated on the surface of the asteroid. The rovers house cameras, thermometers, potentiometers, accelerometers, gyro, and photodiodes to explore Ryugu in different locations 47 . MASCOT is a small lander for the investigation of Ryugu.…”

Section: Spectral Indicator Possible Assignmentsmentioning

confidence: 99%

“…MASCOT's scientific instruments include a multi-spectral radiometer (MASCOT Radiometer, MARA) for measuring radiation flux and IR brightness temperature in six wavelength ranges between 5.5 and 15.5 µm 51 and a near IR hyperspectral microscope (MicrOmega) for in situ characterization of texture and composition of surface minerals in a spectral range of 0.99 to 3.65 µm 52 . Finally, an impact sampling system fires a projectile into the asteroids that ejects small grains of material be caught in a sampling horn and brought up into the sampling system to be sealed in containers that will be returned to Earth for comparative analysis of the composition 47 . This approach enables comprehensive texture and composition analysis.…”

Section: Spectral Indicator Possible Assignmentsmentioning

confidence: 99%

See 1 more Smart Citation

Studying the early solar system: exploration of minor bodies with spaceborne VIS/IR spectrometers: a review and prospects

Arnold

Helbert

Kappel

2018

Infrared Remote Sensing and Instrumentation XXVI

View full text Add to dashboard Cite

Small bodies like asteroids and comets are little differentiated objects that have preserved information about the early state of our solar system. Depending on the heliocentric distance of their origin and their further development they exhibit different pristine compositions that include minerals, ices, and refractory organics. Thus, the composition analysis of minor bodies enables investigations of their evolutionary paths and insights into early processes of planetary formation. In the last decades, new spaceflight and instrument technologies enabled detailed investigations of such bodies during flybys, orbital observations, in situ studies with descent probes, and lander experiments. Core payload elements of these missions include VIS to IR spectrometers, which provided regional and global maps of surface composition, texture, and temperature. The wide range of materials to be detected and the large variability of measurement conditions require dedicated instrumentation and observation strategies for this purpose. This paper reviews the state of the art knowledge and technology achievements in this research field. Scientific results, requirements, and instrumental solutions for minor planetary body studies with VIS to IR spectrometers and radiometers are discussed using examples like the Rosetta mission to comet 67P/Churyumov-Gerasimenko, the asteroid missions Dawn to 4 Vesta and 1 Ceres (dwarf planet), and Hayabusa2 to 162173 Ryugu. Based on our present knowledge, open questions in minor body research are summarized, and resulting scientific and instrumental requirements for future spaceborne VIS/IR spectral studies are elaborated in detail.

show abstract

Section: Spectral Indicator Possible Assignmentsmentioning

confidence: 99%

Section: Spectral Indicator Possible Assignmentsmentioning

confidence: 99%

Studying the early solar system: exploration of minor bodies with spaceborne VIS/IR spectrometers: a review and prospects

Arnold

Helbert

Kappel

2018

Infrared Remote Sensing and Instrumentation XXVI

View full text Add to dashboard Cite

show abstract

“…Over the past few decades, analyses of microscopic samples have become increasingly important to extract a wealth of scientific information from rare and precious samples. On the one hand, samples, such as the asteroid dust that will be returned by the Hayabusa2 (Watanabe et al 2017(Watanabe et al , 2019Jaumann et al 2019) or the OSIRIX-REx (Hamilton et al 2019;Lauretta et al 2019) space missions, are expected to be very heterogeneous (close to carbonaceous chondrite mineralogy) and require analyses with techniques having nanometer-scale resolution. On the other hand, to gain information from meteorites and geological or biological samples, processes are now increasingly examined at micro/nanometric scales with the aim of combining different in situ complementary methods (e.g., transmission electron microscopy [TEM] for mineralogy and chemical composition, infrared [IR] spectroscopy for molecular information on silicate and organic matter, nanometer scale secondary ion mass spectrometry [NanoSIMS] for isotopes).…”

Section: Introductionmentioning

confidence: 99%

A preparation sequence for multi‐analysis of µm‐sized extraterrestrial and geological samples

Aléon-Toppani

Brunetto

Adnot

et al. 2021

Meteorit & Planetary Scien

View full text Add to dashboard Cite

With the recent and ongoing sample return missions and/or the developments of nano-to microscale 3-D and 2-D analytical techniques, it is necessary to develop sample preparation and analysis protocols that allow combination of different nanometer-to micrometer-scale resolution techniques and both maximize scientific outcome and minimize sample loss and contamination. Here, we present novel sample preparation and analytical procedures to extract a maximum of submicrometer structural, mineralogical, chemical, molecular, and isotopic information from micrometric heterogeneous samples. The sample protocol goes from a nondestructive infrared (IR) tomography of~10 to~70 µm-sized single grains, which provides the distribution and qualitative abundances of both mineral and organic phases, followed by its cutting in several slices at selected sites of interest for 2-D mineralogical analysis (e.g., transmission electron microscopy), molecular organic and mineral analysis (e.g., Raman and/or IR microspectroscopy), and isotopic/chemical analysis (e.g., NanoSIMS). We also discuss here the importance of the focused ion beam microscopy in the protocol, the problems of sample loss and contamination, and at last the possibility of combining successive different analyses in various orders on the same micrometric sample. Special care was notably taken to establish a protocol allowing correlated NanoSIMS/TEM/IR analyses with NanoSIMS performed first. Finally, we emphasize the interest of 3-D and 2-D IR analyses in studying the organics-minerals relationship in combination with more classical isotopic and mineralogical grain characterizations.

show abstract

“…Radar observations of asteroids have been used extensively to inversely solve for surface properties to supplement the large knowledge gaps that exist in the study of the structure and composition of asteroids (Magri et al., 2001; Nolan et al., 2013; Ostro et al., 1985; Palmer et al., 2015; Shepard et al., 2010). With currently operating space missions targeting asteroids, such as NASA's OSIRIS‐REx (Lauretta et al., 2017) and JAXA's Hayabusa2 (Watanabe et al., 2017) missions, and numerous planned missions, such as NASA's PSYCHE (Oh et al., 2019), DART (Cheng et al., 2018), and Lucy (Levison, 2017) missions, establishing bounds for possible asteroid surface properties is paramount.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Dielectric Properties of Minerals From Crystals to Bulk Powders for Improved Interpretation of Asteroid Radar Observations

et al. 2020

View full text Add to dashboard Cite

Planetary radar has provided a growing number of data sets on the inner planets and near‐Earth and main belt asteroid populations in the solar system. Physical interpretation of radar data for inference of surface properties requires constraints on the constitutive parameters of the material making up a given surface. In this study, the complex permittivity of seven minerals as a function of frequency and porosity is measured using the coaxial transmission line method to determine the mixing equation that best describes the relationship between the real part of the complex permittivity of single mineral crystals and granular mineral powders. We find the Looyenga‐Landau‐Lifshitz and Bruggeman symmetric mixing equations to describe our experimental results with the highest accuracy. The variation in the real part of the permittivity of solid mineral crystals between different minerals is shown to depend on the grain density and the chemical composition of the minerals. These mixing relationships are incorporated into an asteroid radar model and used to calculate the porosity in the near‐surface of seven asteroids visited by robotic spacecraft using Earth‐based radar observations. The results of the asteroid radar model support the presence of significant porosity in the boulders on the surface of asteroid 101955 Bennu. This research highlights the ability of radar to measure the porosity on asteroid surfaces and provides theoretical and experimental justification for the inversion of permittivity to bulk density assumed by the asteroid radar model.

show abstract

Hayabusa2 Mission Overview

Cited by 22 publications

References 52 publications

Studying the early solar system: exploration of minor bodies with spaceborne VIS/IR spectrometers: a review and prospects

Studying the early solar system: exploration of minor bodies with spaceborne VIS/IR spectrometers: a review and prospects

A preparation sequence for multi‐analysis of µm‐sized extraterrestrial and geological samples

Modeling the Dielectric Properties of Minerals From Crystals to Bulk Powders for Improved Interpretation of Asteroid Radar Observations

Contact Info

Product

Resources

About