Results 61 to 70 of about 15,938 (229)

Isolating the mechanisms for asteroid surface refreshing

Icarus, 2023
Evidence is seen for young, fresh surfaces among Near-Earth and Main-Belt asteroids even though space-weathering timescales are shorter than the age of the surfaces. A number of mechanisms have been proposed to refresh asteroid surfaces on short timescales, such as planetary encounters, YORP spinup, thermal degradation, and collisions.
Francesca E. DeMeo, Michaël Marsset, David Polishook, Brian J. Burt, Richard P. Binzel, Sunao Hasegawa, Mikael Granvik, Nicholas A. Moskovitz, Alissa Earle, Schelte J. Bus, Cristina A. Thomas, Andrew S. Rivkin, Stephen M. Slivan   +12 more
openaire   +3 more sources

Thermophysical Modeling of Asteroid (15) Eunomia from Spatially Resolved ALMA and VLA Data

The Planetary Science Journal
Asteroid (15) Eunomia is the largest S-type asteroid in the main belt and the largest member of the Eunomia asteroid family. Previous visible-to-mid-infrared data suggested that Eunomia’s hemispheres have different olivine-to-pyroxene ratios and that ∼2%
Yu Yu Phua, Katherine de Kleer, Bryan Butler, Saverio Cambioni, Michael Shepard   +4 more
doaj   +1 more source

Surface Compositions of Trojan Asteroids

Space Science Reviews
AbstractThe Jupiter Trojan asteroids are a key population for understanding the chemical and dynamical evolution of the Solar System. Surface compositions of Trojans, in turn, provide crucial information for reconstructing their histories. NASA’s Lucy mission will soon complete the first spacecraft reconnaissance of this population.
Joshua P. Emery, Richard P. Binzel, D. T. Britt, Michael E. Brown, C. J. A. Howett, A. Martin, M. D. Melita, Ana Carolina Souza-Feliciano, Ian Wong   +8 more
openaire   +2 more sources

Regolith mechanics on Asteroid surfaces

, 2017
Introduction: It is very likely that most aster- oids surfaces are covered by a regolith layer. We are focussing on the mechanical properties of such regolith, i.e., a granular material under micro-gravity (µ-g) conditions. Any operations on asteroids that are not remote, need to interact mechanically with the surface material, and for resource ...
Biele, Jens, Ulamec, Stephan
openaire   +2 more sources

First disk-resolved spectroscopy of (4) Vesta

, 2009
Vesta, the second largest Main Belt asteroid, will be the first to be explored in 2011 by NASA's Dawn mission. It is a dry, likely differentiated body with spectrum suggesting that is has been resurfaced by basaltic lava flows, not too different from the
Carry, Benoît, Dumas, Christophe, Fulchignoni, Marcello, Vernazza, Pierre   +3 more
core   +2 more sources

Filling a Gap in Materials Mechanics: Nanoindentation at High Constant Strain Rates up to 105 s−1

Small, EarlyView.
A piezoelectric nanoindentation platform enables constant strain‐rate testing up to 105 s−1, extending experimental capabilities to extreme deformation regimes. Distinct hardness upturns are revealed across crystalline and amorphous materials, verified as intrinsic responses through quasi‐static reloading.
Lalith Kumar Bhaskar, Dipali Sonawane, Hendrik Holz, Jeongin Paeng, Peter Schweizer, Jing Rao, Bárbara Bellón, Damian Frey, Aloshious Lambai, Laszlo Pethö, Johann Michler, Jakob Schwiedrzik, Gaurav Mohanty, Gerhard Dehm, Rajaprakash Ramachandramoorthy   +14 more
wiley   +1 more source

Evidence of Possible Spectral Variability in the Patroclus–Menoetius Binary System

The Planetary Science Journal
We present new visible-wavelength spectroscopic observations of the Patroclus–Menoetius binary system in the Jupiter Trojan population. Motivated by previously published spectra from different instruments that showed evidence of significant longitudinal ...
Ian Wong, William M. Grundy, Joshua P. Emery, Richard P. Binzel, Oriel A. Humes, Simone Marchi, Pippa M. Molyneux, Keith S. Noll   +7 more
doaj   +1 more source

The differing magnitude distributions of the two Jupiter Trojan color populations [PDF]

, 2014
The Jupiter Trojans are a significant population of minor bodies in the middle Solar System that have garnered substantial interest in recent years. Several spectroscopic studies of these objects have revealed notable bimodalities with respect to near ...
Brown, Michael E., Emery, Joshua P., Wong, Ian   +2 more
core   +3 more sources

EU Space Law and Earth's Boundaries: Integrating Environmental Impact Assessment and Corporate Due Diligence

Global Policy, EarlyView.
ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley   +1 more source

Keck and Gemini Characterization of Hayabusa2# Rendezvous Target 1998 KY26

The Astronomical Journal
Near-Earth object (NEO) 1998 KY _26 is a target of the Hayabusa2# spacecraft, which it will rendezvous with in 2031 July. The asteroid has been noted to rotate rapidly and has a large out-of-plane nongravitational acceleration.
Bryce T. Bolin, Christoffer Fremling, Matthew Belyakov, Jin Beniyama, Marco Delbo, Robert Jedicke, Ian Wong, Laura-May Abron, Keith S. Noll, Andrew W. Stephens   +9 more
doaj   +1 more source