Results 41 to 50 of about 8,179,561 (212)

Thermophysical Investigation of Asteroid Surfaces. II. Factors Influencing Grain Size

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
doaj   +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

On the oldest asteroid families in the main belt [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
Asteroid families are groups of minor bodies produced by high-velocity collisions. After the initial dispersions of the parent bodies fragments, their orbits evolve because of several gravitational and non-gravitational effects,such as diffusion in mean-motion resonances, Yarkovsky and YORP effects, close encounters of collisions, etc.
Carruba, V, Nesvorný, D., Aljbaae, Safwan, Domingos, R, Huaman, M   +4 more
openaire   +5 more sources

WISE results for the Main Belt Asteroids

, 2011
We present diameter and albedo results for main belt asteroids using data from the WISE spacecraft.
Mueller, M., Walker, R. G., Wright, E. L., Cutri, R., Masiero, J., Bauer, J. M., McMillan, R. S., Mainzer, A. K., Grav, T., Delbo, M., Dailey, J.   +10 more
core   +1 more source

Transformer-based Approach for Accurate Asteroid Spectra Taxonomy and Albedo Estimation

The Astronomical Journal
China 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, Yunxiao Jiang, Yuxiang Feng, Xiaoming Zhang, Xiaojun Jiang   +4 more
doaj   +1 more source

The Size Frequency Distribution of Small Main-Belt Asteroids [PDF]

, 2012
The asteroid size distribution informs us about the formation and composition of the Solar System. We build on our previous work in which we harvest serendipitously observed data of the Taurus region and measure the brightness and size distributions of ...
Hines, Dean C., Hulsebus, Alan, Rebull, Luisa M., Burt, Brian J., Fuentes, Cesar I., Stapelfeldt, Karl R., Trilling, David E.   +6 more
core  

Basaltic asteroids in the middle and outer main belt

, 2022
Up to now, only (4) Vesta has been thought of as a source of differentiated material, which has been discovered all around the Main Belt region. However, the investigations have shown that the objects, with the same spectral properties of Vesta and ...
Morate, David, Migliorini, Alessandra, Michtchenko, Tatiana, La Forgia, Fiorangela, Lazzarin, Monica, Lazzaro, Daniela, De Sanctis, Maria Cristina   +6 more
core  

Active Asteroids: Main-Belt Comets and Disrupted Asteroids [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractThe study of active asteroids has attracted a great deal of interest in recent years since the recognition of main-belt comets (which orbit in the main asteroid belt, but exhibit comet-like activity due to the sublimation of volatile ices) as a new class of comets in 2006, and the discovery of the first disrupted asteroids (which, unlike MBCs ...
openaire   +2 more sources

A general spectral slope-exposure relation for S-type main belt and near-earth asteroids [PDF]

, 2006
We present a general and significant relation between the spectral slope of silicate-rich asteroids (both main-belt and near-Earth asteroids) and the exposure to space weathering, computed taking into account the age and the distance from the Sun.
MAGRIN, SARA, S. Magrin, MARCHI, SIMONE, S. Marchi, LAZZARIN, MONICA, P. Paolicchi, M. Lazzarin, PAOLICCHI P, PAOLICCHI, PAOLO, Lazzarin M, Marchi S, Magrin S.   +11 more
core   +2 more sources

Mass, Density, and Radius of Asteroid (16) Psyche from High-precision Astrometry

The Astronomical Journal
We characterize asteroid (16) Psyche using high-precision astrometry, including the recent Gaia Focused Product Release. The gravitational perturbations of Psyche on other asteroids can be observable in the case of mutual encounters.
Davide Farnocchia, Oscar Fuentes-Muñoz, Ryan S. Park, James Baer, Steven R. Chesley   +4 more
doaj   +1 more source