Results 41 to 50 of about 15,938 (229)

A Spectroscopic Comparison of HED Meteorites and V-type Asteroids in the Inner Main Belt [PDF]

, 2010
V-type asteroids in the inner Main Belt (a < 2.5 AU) and the HED meteorites are thought to be genetically related to one another as collisional fragments from the surface of the large basaltic asteroid 4 Vesta.
Binzel, Richard, Burbine, Thomas, Bus, Schelte, Moskovitz, Nicholas, Willman, Mark   +4 more
core   +2 more sources

An Asteroid Lander/Rover for Asteroid Surface Gravity Surveying

, 2016
Microsat and nanosat developers have mastered the challenges involved in developing low-cost, high-performance satellite missions in low Earth orbit. Here we describe a proposed small-microsat-scale (~20 kg) planetary exploration mission based on the same design approach used in those LEO missions.
Carroll, Kieran A., Spencer, Henry, Zee, Robert E.   +2 more
openaire   +2 more sources

Simulating the (99942) Apophis Earth Flyby Using a Contact Binary Model

The Planetary Science Journal
This paper investigates the mass shifts of asteroid (99942) Apophis during its 2029 close encounter with Earth, using the contact dynamics method, a type of discrete element method. Unlike previous analyses, we model the asteroid as a contact binary body
Hai-Shuo Wang, Paul Sánchez, D.J. Scheeres   +2 more
doaj   +1 more source

Sm and Gd Isotopic Shifts in Eucrites and Implications for Their Cosmic-Ray Exposure History

The Astrophysical Journal, 2023
The isotopic compositions of Sm and Gd in eight eucrites—five from a desert, Dar al Gani (DaG) 380, DaG 391, DaG 411, DaG 443, and DaG 480, and three from nondesert areas, Juvinas, Millibillillie, and Stannern—were determined to understand the cosmic-ray
Takaharu Saito, Hiroshi Hidaka, Shigekazu Yoneda   +2 more
doaj   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Thermophysical Model of (269) Justitia—Main Belt Asteroid Possibly Implanted from Trans-Neptunian Region

The Planetary Science Journal
Asteroid Justitia is a special main-belt object, being an extremely red body with a steeper spectral slope than any other D-type asteroid. Conversely, its spectral and polarimetric properties resemble organics-rich Centaurs and trans-Neptunian objects ...
Anna Marciniak, Antoine Choukroun, Julia Perła, Waldemar Ogłoza, Robert Szakáts, Pierre Antonini, Raoul Behrend, Géza Csörnyei, Marek Dróżdż, Marcel Fauvaud, Stéphane Fauvaud, Adrian Jones, Dong-Heun Kim, Myung-Jin Kim, Viktor Kudak, Iga Mieczkowska, Erika Pakštienė, Vasyl Perig, Eda Sonbas   +18 more
doaj   +1 more source

Poincar\'e surfaces of section around a 3-D irregular body: The case of asteroid 4179 Toutatis

, 2017
In general, small bodies of the solar system, e.g., asteroids and comets, have a very irregular shape. This feature affects significantly the gravitational potential around these irregular bodies, which hinders dynamical studies.
Motta, Gabriel Borderes, Winter, Othon Cabo   +1 more
core   +2 more sources

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, Guentae Doh, Dongho Lee, Youngho Kim, Changmin Shin, Su‐Jin Shin, Young‐Chul Ghim, Sanghoo Park, Wonho Choe   +8 more
wiley   +1 more source

DART Impact Ejecta Plume Evolution: Implications for Dimorphos

The Planetary Science Journal
The NASA Double Asteroid Redirection Test (DART) spacecraft impacted the moon Dimorphos of the [65803] Didymos binary system and changed the binary orbit period, demonstrating asteroid deflection by a kinetic impact and indicating that more momentum was ...
Andrew F. Cheng, S. D. Raducan, M. Jutzi, T. L. Farnham, E. Dotto, V. Della Corte, E. Mazzotta Epifani, A. Rossi, I. Gai, J. Deshapriya, P. Hasselmann, I. Bertini, A. Zinzi, S. Ivanovski, J. Brucato, Giovanni Poggiali, A. Lucchetti, M. Pajola, G. Zanotti, M. Amoroso, A. Capannolo, G. Cremonese, M. Dall’Ora, S. Ieva, G. Impresario, M. Lavagna, D. Modenini, P. Palumbo, D. Perna, S. Pirrotta, P. Tortora, M. Zannoni   +31 more
doaj   +1 more source

I. Collisional evolution and reddening of asteroid surfaces: The problem of conflicting timescales and the role of size-dependent effects

, 2011
Space weathering is the generic term used for processes that modify the optical properties of surfaces of atmosphereless rocky bodies under exposure to the space environment. The general agreement about the relevance of the effects of space weathering on
Marchi, S., Paolicchi, P., Richardson, D. C.   +2 more
core   +1 more source