Highly porous nature of a primitive asteroid revealed by thermal ...
2020年3月16日 · Thermal imaging data obtained from the spacecraft Hayabusa2 reveal that the carbonaceous asteroid 162173 Ryugu is an object of unusually high porosity.
Eyes on Asteroids - NASA/JPL - NASA's Eyes
Explore the 3D world of Asteroids, Comets and NEOs. Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth.
Giant 'God of Darkness' Asteroid May Not Escape Earth Unscathed
2024年11月12日 · We're honestly pretty amped for the flyby. The asteroid will be visible to the naked eye as it skims past Earth, granting us a rare opportunity, not just to wave at a passing asteroid, but study it in greater, closer detail than we are usually able.
Asteroid Density, Porosity, and Structure - NASA/ADS
New data from observations of asteroid mutual perturbation events, observations of asteroid satellites, and spacecraft encounters have revolutionized our understanding of asteroid bulk density. Most asteroids appear to have bulk densities that are well below the grain density of their likely meteorite analogs.
(PDF) Asteroid Density, Porosity, and Structure - ResearchGate
2002年1月1日 · New data from observations of asteroid mutual perturbation events, observations of asteroid satellites, and spacecraft encounters have revolutionized our understanding of asteroid bulk...
Fine-regolith production on asteroids controlled by rock porosity
2021年10月6日 · The absence of fine regolith on the asteroid Bennu is due to the high porosity of its rocks, which compress rather than fragment after impacts and exhibit slow thermal cracking.
Low thermal conductivity boulder with high porosity identified on …
2019年7月15日 · Here we report on in situ thermal infrared observations of a boulder on the C-type asteroid Ryugu.
Composition, mineralogy, and porosity of multiple asteroid systems …
2015年2月1日 · Composition, mineralogy, and porosity of multiple asteroid systems from visible and near-infrared spectral data ☆
The role of asteroid strength, porosity and internal friction in …
2019年9月1日 · In this study we numerically simulate impacts into low-gravity, strength dominated asteroid surfaces using the iSALE shock physics code, and consider the Double Asteroid Redirection Test (DART) mission as a case study.
Porosity Evolution in Metallic Asteroids: Implications for the Origin ...
2022年2月1日 · Some M-type asteroids have measured bulk densities much lower than expected based on their metal-rich surfaces. In particular, the density of the largest M-type asteroid 16 Psyche would require a bulk porosity of ∼52 vol% if it has a pure iron composition.