Results 101 to 110 of about 394,300 (243)
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
Orbital and Physical Characterization of Asteroid Dimorphos Following the DART Impact
The Planetary Science JournalThe Double Asteroid Redirection Test (DART) mission impacted Dimorphos, the satellite of binary near-Earth asteroid (65803) Didymos, on 2022 September 26 UTC.
Shantanu P. Naidu +12 more
doaj +1 more source
AerospaceThis paper aims to investigate the effects of asteroid size and shape and solar radiation pressure in the trajectories of a spacecraft in transfers between the collinear equilibrium points of a binary non-spherical asteroid system.
L. B. T. Santos +3 more
doaj +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
Predicting Performance of Hall Effect Ion Source Using Machine Learning
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.This study introduces HallNN, a machine learning tool for predicting Hall effect ion source performance using a neural network ensemble trained on data generated from numerical simulations. HallNN provides faster and more accurate predictions than numerical methods and traditional scaling laws, making it valuable for designing and optimizing Hall ...
Jaehong Park +8 more
wiley +1 more source
SAFARI: Searching Asteroids For Activity Revealing Indicators [PDF]
, 2018 Active asteroids behave dynamically like asteroids but display comet-like comae. These objects are poorly understood, with only about 30 identified to date. We have conducted one of the deepest systematic searches for asteroid activity by making use of deep images from the Dark Energy Camera (DECam) ideally suited to the task.
arxiv +1 more source
The Astrophysical Journal Supplement SeriesThe proper elements of asteroids are obtained from the instantaneous orbital elements by removing periodic oscillations produced by gravitational interactions with planets.
David Nesvorný +3 more
doaj +1 more source
Orbital dynamics of 2020 AV2: the first Vatira asteroid [PDF]
, 2020 Sarah Greenstreet
openalex +1 more source
On the origin of the Almahata-Sitta meteorite and 2008TC3 asteroid [PDF]
, 2012 Asteroid 2008TC3 was a Near Earth Asteroid that impacted the Earth on 2008 October 7. Meteorites were produced by the break-up of 2008TC3 in the high atmosphere and at present, about 600 meteorites - called Almahata Sitta - coming from 2008TC3 have been recovered.
arxiv +1 more source
Migration of Near Earth Asteroid to Jovian-Crosser Asteroid:Case Study 3552 Don Quixote [PDF]
Jurnal Matematika & Sains,2010, Vol. 12, No.3, p.34-38, 2010 It is generally recognized that main-belt asteroids (MBAs) and nuclei of extinct comets are the two main sources for the Near-Earth-Asteroids (NEAs). Theoretical studies of NEAs dynamics and numerical modelling of their orbital motions showed that the resonance mechanism for supplying NEAs is quite sufficient to sustain this population.
arxiv