Thermophysical Investigation of Asteroid Surfaces. II. Factors Influencing Grain Size [PDF]
The Planetary Science Journal, 2022 Asteroid surfaces are subjected to mechanical weathering processes that result in the development and evolution of regolith. Two proposed mechanisms—impact bombardment and thermal fatigue—have been proposed as viable and dominant weathering processes ...
Eric M. MacLennan, Joshua P. Emery
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Ejecta distribution and momentum transfer from oblique impacts on asteroid surfaces [PDF]
Icarus (New York, N.Y. 1962), 2021 Sabina D. Raducan +2 more
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Spectral Evolution of Dark Asteroid Surfaces Induced by Space Weathering over a Decade [PDF]
Astrophysical Journal Letters, 2022 The surfaces of airless bodies like asteroids in the solar system are known to be affected by space weathering. Experiments simulating space weathering are essential for studying the effects of this process on meteorite samples, but the problem is that ...
S. Hasegawa +22 more
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Implications of cohesive strength in asteroid interiors and surfaces and its measurement [PDF]
Progress in Earth and Planetary Science, 2018 Recent observations and theory have indicated that rubble pile asteroids may have a small, but finite, level of tensile strength, allowing them to spin above their spin deformation limit as defined in Holsapple (Icarus 205:430–442, 2010).
Daniel J. Scheeres, Paul Sánchez
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Thermophysical Investigation of Asteroid Surfaces. I. Characterization of Thermal Inertia [PDF]
The Planetary Science Journal, 2021 The thermal inertia of an asteroid is an indicator of the thermophysical properties of the regolith and is determined by the size of grains on the surface.
E. MacLennan, J. Emery
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Diverse space weathering effects on asteroid surfaces as inferred by laser irradiation of meteorites
Astronomy & Astrophysics, 2022 Context. Space weathering (SW) is crucial to improve the understanding of the evolution of optical characteristics on airless bodies. The classical view based on research of the Moon suggests that SW decreases albedo (darkening) and steepens spectral ...
Pengfei Zhang +11 more
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Thermophysical Modeling of Asteroid Surfaces Using Ellipsoid Shape Models [PDF]
Astronomical Journal, 2018 Thermophysical Models (TPMs), which have proven to be a powerful tool in the interpretation of the infrared emission of asteroid surfaces, typically make use of shape models and spin axes obtained a priori for use as input boundary conditions.
E. MacLennan, J. Emery
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Constraining surface properties of asteroid (162173) Ryugu from numerical simulations of Hayabusa2 mission impact experiment [PDF]
Nature Communications, 2022 The Hayabusa2 mission impact experiment on asteroid Ryugu created an unexpectedly large crater. The associated regime of low-gravity, low-strength cratering remained largely unexplored so far, because these impact conditions cannot be re-created in ...
M. Jutzi +4 more
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Asteroid Surface Geophysics [PDF]
, 2015 28 pages, 8 figures. Chapter to appear in the book ASTEROIDS IV, (University of Arizona Press) Space Science Series, edited by P. Michel, F.
Murdoch, Naomi +3 more
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Monthly notices of the Royal Astronomical Society, 2020 In recent years, several studies have shown the importance of thermal fracturing of rocks due to temperature variations, on The Earth and Mars. Rock thermal cracking might also be a process at play on the lunar surface.
G. Libourel +6 more
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