Results 31 to 40 of about 164,857 (187)
Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.Abstract Fractures can exhibit mixed modes of displacement, that is, combinations of displacements parallel and perpendicular to the fracture plane, that make a displacement‐to‐length (Dmax/L) scaling analysis challenging. However, such analysis is important for understanding the propagation and nature of mixed‐mode fracture populations. In this study,
Hiu Ching Jupiter Cheng +2 more
wiley +1 more source
Scattering V-type asteroids during the giant planets instability: A step for Jupiter, a leap for basalt [PDF]
, 2017 V-type asteroids are a taxonomic class whose surface is associated to a basaltic composition. The only known source of V-type asteroids in the Main Asteroid Belt is (4) Vesta, that is located in the inner part of the belt. However, many V-type asteroids cannot be dynamically linked to Vesta., in particular, those asteroids located in the middle and ...
arxiv +1 more source
Masses of the Main Asteroid Belt and the Kuiper Belt from the Motions of Planets and Spacecraft [PDF]
Astronomy Letters, 2018, Vol. 44, Nos. 8-9, pp. 554--566, 2018 Dynamical mass estimates for the main asteroid belt and the trans-Neptunian Kuiper belt have been found from their gravitational influence on the motion of planets. Discrete rotating models consisting of moving material points have been used to model the total attraction from small or as yet undetected bodies of the belts. The masses of the model belts
arxiv +1 more source
The Hermean Helium Exosphere—Continuous and Sporadic Helium Release Processes
Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.Abstract Since its detection by Mariner 10, helium has been a key focus in studies of Mercury's exosphere. Recently, Weichbold et al. (2025), https://doi.org/10.1029/2024je008679 provided the first in situ helium measurements, inferring density from Ion Cyclotron Wave (ICW) events observed by the MESSENGER spacecraft.
J. Hener +5 more
wiley +1 more source
Transformer-based Approach for Accurate Asteroid Spectra Taxonomy and Albedo Estimation
The Astronomical JournalChina plans to launch a probe (Tianwen-2) around 2025, mainly to explore the near-Earth asteroid 2016 HO3 (469219, Kamo’oalewa). The mission involves close-range exploration, landing, and mining operations that require three-dimensional modeling of the ...
Yijun Tang +4 more
doaj +1 more source
The Compositional Structure of the Asteroid Belt [PDF]
, 2015 The past decade has brought major improvements in large-scale asteroid discovery and characterization with over half a million known asteroids and over 100,000 with some measurement of physical characterization. This explosion of data has allowed us to create a new global picture of the Main Asteroid Belt. Put in context with meteorite measurements and
arxiv +1 more source
Magnetization of Iron Meteorites up to the Meter in Size as Possible Analogs for Asteroid Psyche
Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.Abstract Meteorite paleomagnetic studies indicate planetesimal generated magnetic fields, but spacecraft magnetic measurements have yet to identify asteroidal natural remanent magnetization (NRM). This apparent discrepancy is of particular interest in the context of the NASA Psyche mission, which will search for evidence of past magnetic activity of ...
Clara Maurel +6 more
wiley +1 more source
A Pre-flyby View on the Origin of Asteroid Donaldjohanson, a Target of the NASA Lucy Mission
The Planetary Science JournalThe NASA Lucy mission is scheduled to fly by the main-belt asteroid (52246) Donaldjohanson on 2025 April 20. Donaldjohanson (DJ hereafter) is a member of the primitive (C-type class) Erigone collisional asteroid family located in the inner main belt in ...
Simone Marchi +5 more
doaj +1 more source
Olivine-dominated A-type asteroids in the Main Belt: Distribution, Abundance and Relation to Families [PDF]
, 2019 Differentiated asteroids are rare in the main asteroid belt despite evidence for ~100 distinct differentiated bodies in the meteorite record. We have sought to understand why so few main-belt asteroids differentiated and where those differentiated bodies or fragments reside. Using the Sloan Digital Sky Survey (SDSS) to search for a needle in a haystack
arxiv +1 more source
Review of asteroid, meteor, and meteorite‐type links
Meteoritics &Planetary Science, Volume 60, Issue 4, Page 928-973, April 2025.Abstract With the goal to determine the origin of our meteorites in the asteroid belt, video and photographic observations of meteors have now tracked 75 meteorite falls. Six years ago, there were just hints that different meteorite types arrived on different orbits, but now, the number of orbits (N) is high enough for distinct patterns to emerge.
Peter Jenniskens +1 more
wiley +1 more source