The University of Tokyo · 물리·천문학
Eri Tatsumi 교수의 연구실은 소행성 표면의 광학적 및 광학적 특성 분석을 중심으로, 주로 근적외선 및 근자외선 영역의 반사 스펙트럼을 활용해 소행성의 물질 조성과 기원을 규명하는 데 중점을 두고 있습니다. 특히 히야부사2와 OSIRIS-REx 미션을 통해 확보한 고해상도 영상 및 스펙트럼 데이터를 기반으로 표면의 외생 물질 분포, 태양풍 및 열화학적 변화에 의한 표면 변화를 연구하고 있습니다. 연구는 근본적으로 태양계 초기 물질의 보존 상태와 소행성의 열적 역사에 대한 통찰을 제공합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Context. The Hayabusa2 spacecraft launched by Japan Aerospace Exploration Agency has been conducting observations of the asteroid (162173) Ryugu since June 2018. The Telescopic Optical Navigation Camera (ONC-T) onboard Hayabusa2 has obtained thousands of images under a variety of illumination and viewing conditions. Aims. Our objective is to examine and validate the camera calibration, derive a photometric correction for creating global albedo maps, and to interpret the photometric modeling resu
Ryugu is a carbonaceous rubble-pile asteroid visited by the Hayabusa2 spacecraft. Small rubble pile asteroids record the thermal evolution of their much larger parent bodies. However, recent space weathering and/or solar heating create ambiguities between the uppermost layer observable by remote-sensing and the pristine material from the parent body. Hayabusa2 remote-sensing observations find that on the asteroid (162173) Ryugu both north and south pole regions preserve the material least proces
ABSTRACT Using the multiband imager MapCam on board the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) spacecraft, we identified 77 instances of proposed exogenic materials distributed globally on the surface of the B-type asteroid (101955) Bennu. We identified materials as exogenic on the basis of an absorption near 1 $\mu$m that is indicative of anhydrous silicates. The exogenic materials are spatially resolved by the telescopic camera Po
Context. Spectrophotometry data of asteroids obtained in the 1980s showed that there are large variations in their near-ultraviolet (NUV) reflectance spectra. Reflectance spectra at NUV wavelengths are important because they help detect the presence of hydrated minerals and organics on the asteroid surfaces. However, the NUV wavelength region has not been fully investigated yet using spectroscopic data. Aims. The aim of our study is to obtain the near-ultraviolet to visible (NUV-VIS, 0.35–0.95 μ
