Results 21 to 30 of about 21,905 (255)

Dynamical evolution of cometary asteroids [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1998
ABSTRA C T We present results from long-term numerical integrations of hypothetical Jupiter-family comets (JFCs) over time-scales in excess of the estimated cometary active lifetime. During inactive periods these bodies could be considered as ‘cometary’ near-Earth objects (NEOs) or ‘cometary asteroids’. The contribution of cometary asteroids to the NEO
N. W. Harris, M. E. Bailey
openaire   +1 more source

Mirror formation control in the vicinity of an asteroid [PDF]

open access: yes, 2008
Two strategies are presented for the positioning and control of a spacecraft formation designed to focus sunlight onto a point on the surface of asteroid, thereby sublimating the material and ejecting debris creating thrust.
Battin R. H.   +11 more
core   +2 more sources

Dynamical lifetimes of asteroids in retrograde orbits [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2017
The population of known minor bodies in retrograde orbits ($i > 90 ^{\circ}$) that are classified as asteroids is still growing. The aim of our study was to estimate the dynamical lifetimes of these bodies by use of the latest observational data, including astrometry and physical properties.
Kankiewicz, Paweł   +1 more
openaire   +2 more sources

Dynamical Masses of 20 Asteroids Determined with Gaia DR3 Asteroid Observations

open access: yesThe Astronomical Journal, 2023
Abstract We combined the ground-based and Gaia Data Release 3 (DR3) asteroid observations to determine the masses of 20 asteroids with asteroid–asteroid close encounters. In order to take full advantage of the high-precision observations from Gaia, we use the Fisher information to select appropriate model parameters and the modified ...
Fan 凡 Li 李   +3 more
openaire   +2 more sources

Carbon Speciation and Solubility in Silicate Melts

open access: yesGeophysical Monograph Series, Page 179-194., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Natalia Solomatova   +2 more
wiley  

+1 more source

Experimental Observation of a Calcium Silicon Double Carbonate

open access: yesAngewandte Chemie, EarlyView.
High‐pressure and ‐temperature reactions between Ca5(Si2O7)(CO3)2 tilleyite and CO2 carbon dioxide yield the first experimental evidence of the double carbonate Ca2Si(CO3)4 and a new Ca2(C4O10) phase containing tetrahedral [CO4] units. These findings reveal unexpected carbonate chemistry and highlight pathways for carbon incorporation under mantle ...
Benedito Donizeti Botan‐Neto   +6 more
wiley   +2 more sources

Colors of dynamically associated asteroid pairs [PDF]

open access: yesIcarus, 2012
22 pages, 7 figures, Accepted to ...
openaire   +2 more sources

Dynamic autonomous intelligent control of an asteroid lander [PDF]

open access: yes, 2010
One of the future flagship missions of the European Space Agency (ESA) is the asteroid sample return mission Marco-Polo. Although there have been a number of past missions to asteroids, a sample has never been successfully returned.
Bernstein D. S.   +4 more
core   +1 more source

DYNAMICAL EFFECTS FROM ASTEROID BELTS FOR PLANETARY SYSTEMS [PDF]

open access: yesInternational Journal of Bifurcation and Chaos, 2004
The orbital evolution and stability of planetary systems with interaction from the belts is studied using the standard phase-plane analysis. In addition to the fixed point which corresponds to the Keplerian orbit, there are other fixed points around the inner and outer edges of the belt.
Jiang, Ing-Guey, Yeh, Li-Chin
openaire   +3 more sources

Imbalanced classification applied to asteroid resonant dynamics

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Introduction: Machine learning (ML) applications for studying asteroid resonant dynamics are a relatively new field of study. Results from several different approaches are currently available for asteroids interacting with the z2, z1, M1:2, and ν6 ...
V. Carruba   +5 more
doaj   +1 more source

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