Results 51 to 60 of about 218,932 (203)

Diffusion in the asteroid belt [PDF]

Proceedings of the International Astronomical Union, 2004
In the beginning we review briefly the evolution of the ideas on the motion of the bodies in our solar system, from Newton's clockwork Universe to the presently accepted ubiquity of chaotic transport in the asteroid belt. Then we discuss the result of chaotic motion, which is transport in phase space, and we introduce the concept of diffusion of an ...
openaire   +1 more source

Quantifying Water Ice in Regolith Mixtures via Infrared (1.2–2.5 μm) Reflectance Model Parametrization

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract Water ice deposits occur on inner solar system bodies in sunlit and shadowed terrains. We develop approaches to remotely determine the mixing mode with regolith (areal vs. intimate), ice grain size, and abundance that reveal processes of ice formation, emplacement, and evolution.
V. V. Kachmar, B. L. Ehlmann
wiley   +1 more source

A smart cloud approach to asteroid deflection [PDF]

, 2011
This paper presents a novel idea for the successful deflection of asteroids. Adapted initially from the kinematic impactor approach, this new concept – Smart Cloud – combines the relative benefits of the ion beam shepard in providing a large cloud of ...
Vasile, Massimiliano, Gibbings, Alison
core   +3 more sources

Asteroid Mass Estimation by Mutual Perturbations During Close Encounters After Gaia Focused Product Release

The Astronomical Journal
Mutual perturbations between asteroids during close encounters allow the estimation of their masses using precise astrometric observations. We use all astrometry reported to the Minor Planet Center, high-precision astrometry from ESA’s Gaia Focused ...
Oscar Fuentes-Muñoz, Davide Farnocchia, Jon D. Giorgini, Ryan S. Park   +3 more
doaj   +1 more source

The transiting dust clumps in the evolved disc of the Sun-like UXor RZ Psc [PDF]

Royal Society Open Science, 2017
RZ Psc is a young Sun-like star, long associated with the UXor class of variable stars, which is partially or wholly dimmed by dust clumps several times each year.
Grant M. Kennedy, Matthew A. Kenworthy, Joshua Pepper, Joseph E. Rodriguez, Robert J. Siverd, Keivan G. Stassun, Mark C. Wyatt   +6 more
doaj   +1 more source

The Mid-plane of the Main Asteroid Belt [PDF]

The Astronomical Journal, 2018
Abstract We measure the mid-plane of the main asteroid belt by using the observational data of a nearly complete and unbiased sample of asteroids and find that it has inclination and longitude of ascending node
Saverio Cambioni, Renu Malhotra
openaire   +2 more sources

Ceres' Salty Ices: Sublimation‐Driven Evolution From Water Ice Exposures to Na‐Carbonate Deposits

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract The dwarf planet Ceres hosts nine geologically recent water ice exposures revealed by NASA's Dawn mission. We investigated the 0.04–11 km2 sites using visible imagery and infrared (1.0–4.3 μm) reflectance spectroscopy. Ice occurrence was mapped, and its abundance, grain size, and mixing mode with local regolith were constrained with Hapke ...
V. V. Kachmar, B. L. Ehlmann
wiley   +1 more source

NH4‐Smectites as Potential Precursors of Nitrogen Compounds Evolved During Analyses by the Sample Analysis at Mars (SAM) Instrument on the Curiosity Rover

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract Ammonium (NH4+) in the interlayer space of phyllosilicates has been proposed as a potential but underexplored nitrogen reservoir on Mars. We synthesized ammonium‐exchanged smectites (montmorillonite SWy‐2 and nontronite NAu‐2) and analyzed them, both as pure phases and in mixtures containing five or 20 wt.% magnesium (Mg) perchlorate, under ...
S. Andrejkovičová, A. C. McAdam, J. C. Stern, M. Millan, R. Navarro‐González, C. A. Knudson, S. T. Wieman, E. B. Rampe, D. W. Ming, C. N. Achilles, S. S. Johnson, F. Rocha, C. A. Malespin, P. R. Mahaffy   +13 more
wiley   +1 more source

Asteroid Collisions: Expected Visibility and Rate

The Astronomical Journal
Asteroid collisions are one of the main processes responsible for the evolution of bodies in the main belt. Using observations of the Dimorphos impact by the DART spacecraft, we estimate how asteroid collisions in the main belt may look in the first ...
Eran O. Ofek, David Polishook, Doron Kushnir, Guy Nir, Sagi Ben-Ami, Yossi Shvartzvald, Nora L. Strotjohann, Enrico Segre, Arie Blumenzweig, Michael Engel, Dennis Bodewits, John W. Noonan   +11 more
doaj   +1 more source

Lightcurve survey of V-type asteroids in the inner asteroid belt [PDF]

Publications of the Astronomical Society of Japan, 2014
Abstract We observed the lightcurves of 13 V-type asteroids [(1933) Tinchen, (2011) Veteraniya, (2508) Alupka, (3657) Ermolova, (3900) Knezevic, (4005) Dyagilev, (4383) Suruga, (4434) Nikulin, (4796) Lewis, (6331) 1992 FZ1, (8645) 1998 TN, (10285) Renemichelsen, and (10320) Reiland].
Hasegawa, Sunao, Miyasaka, Seidai, Mito, Hiroyuki, Sarugaku, Yuki, Ozawa, Tomohiko, Kuroda, Daisuke, Nishihara, Setsuko, Harada, Akari, Yoshida, Michitoshi, Yanagisawa, Kenshi, Shimizu, Yasuhiro, Nagayama, Shogo, Toda, Hiroyuki, Okita, Kouji, Kawai, Nobuyuki, Mori, Machiko, Sekiguchi, Tomohiko, Ishiguro, Masateru, Abe, Takumi, Abe, Masanao   +19 more
openaire   +2 more sources