Results 131 to 140 of about 1,838 (234)

Shaking and Tumbling: Short- and Long-timescale Mechanisms for Resurfacing of Near-Earth Asteroid Surfaces from Planetary Tides and Predictions for the 2029 Earth Encounter by (99942) Apophis

The Planetary Science Journal
Spectral characterization of near-Earth asteroids (NEAs) has revealed a continuum of space-weathered states for the surfaces of S-complex NEAs, with Q-class NEAs, an S-complex subclass, most closely matching the unweathered surfaces of ordinary chondrite
R.-L. Ballouz, H. Agrusa, O.S. Barnouin, K.J. Walsh, Y. Zhang, R.P. Binzel, V.J. Bray, D. N. DellaGiustina, E.R. Jawin, J.V. DeMartini, A. Marusiak, P. Michel, N. Murdoch, D.C. Richardson, E.G. Rivera-Valentín, A.S. Rivkin, Y. Tang   +16 more
doaj   +1 more source

Asteroid Pond Mineralogy: View from a Cognate Clast in LL3 NWA 8330

, 2017
All asteroids surfaces imaged at the cm-scale reveal the presence of pond deposits. These ponds are important because it is likely all asteroid sample return missions will sample them, being the safest (very flat) places to touch down.
Le, L., Zolensky, M.
core  

Radar Circular Polarization Ratio of Near-Earth Asteroids: Links to Spectral Taxonomy and Surface Processes

The Planetary Science Journal
The radar circular polarization ratio (CPR) is an indicator of near-surface, wavelength-scale complexity. Interestingly, previous surveys also noted an association between near-Earth asteroid (NEA) disk-integrated CPR and spectral taxonomic class ...
Edgard G. Rivera-Valentín, Betzaida Aponte-Hernández, Patrick A. Taylor, Michael C. Nolan, Ellen S. Howell, Dany Waller, Luisa F. Zambrano-Marín, Anne K. Virkki, Ronald-Louis Ballouz, Angela M. Stickle   +9 more
doaj   +1 more source

Astex microgravity experiment: simulated asteroid regoliths [PDF]

, 2009
AstEx is a microgravity experiment selected to fly on ESA's 51st Microgravity Research Campaign in November 2009. The experiment will investigate the dynamics of regolith on asteroid surfaces. Despite their very low surface gravities, asteroids exhibit a
Murdoch, Naomi, Rozitis, Ben, Michel, Patrick, de Lophem, Thomas-Louis, Green, Simon F.   +4 more
core  

Asteroid gravitational field calculation via GeodesyNets with quadratic layers

Geo-spatial Information Science
Asteroid gravity inversion is a method used to infer the internal density distribution of small celestial bodies through external gravitational measurements.
Zhitao Fu, Weitong Li, Shanhong Liu
doaj   +1 more source

Categorization of Spatial and Temporal Ejecta Outcomes in Binary Systems Based on Variations of the Didymos System

The Planetary Science Journal
With the increasing number of binary asteroid systems being discovered, ejecta studies must expand from solely investigating single-body systems to modeling more complex multiple-body systems. For example, the Double Asteroid Redirection Test provides an
Jennifer N. Larson, Yanga Fernandez, Gal Sarid   +2 more
doaj   +1 more source

The surface of asteroid Bennu [PDF]

Nature Reviews Materials, 2019
openaire   +1 more source

TIR Emissivity Spectra of Thermally Processed Sulfates, Carbonates and Phyllosilicates as Analog Materials for Asteroid Surfaces

, 2013
At the Planetary Emissivity Laboratory (PEL) of the German Aerospace Center (DLR) in Berlin we are building a database of spectral measurements of several meteorites and other analogs for asteroid surfaces.
Maturilli, Alessandro, Ferrari, Sabrina, D'Amore, Mario, Helbert, Jörn   +3 more
core  

Tools for Asteroid Regolith Operations

, 2013
This RFI response is targeting Area 5. Crew Systems for Asteroid Exploration: concepts for lightweight and low volume robotic and extra-vehicular activity (EVA) systems, such as space suits, tools, translation aids, stowage containers, and other ...
Mantovani, James G., Calle, Carlos I., Mueller, Robert P.   +2 more
core  

Space Weathering Age of Itokawa and Eros by Machine Learning

The Planetary Science Journal
Near-Earth asteroids such as Itokawa and Eros provide valuable insights into the collisional and surface evolution of the inner solar system. As S-type asteroids, their surfaces are altered by space weathering (SW) from solar wind and micrometeorite ...
Lakshika Palamakumbure, David Korda, Tomáš Kohout   +2 more
doaj   +1 more source