Results 121 to 130 of about 1,644 (162)
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On the dynamics in the asteroids belt. Part I : General theory
Celestial Mechanics and Dynamical Astronomy, 1990zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Morbidelli, Alessandro +1 more
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2020
In computer graphics there exist mainly two ways to represent 3D shapes: implicit methods and explicit methods. The explicit method is quite obvious which uses triangle meshes to represent any shape precisely, while the distinct disadvantage is hard to compute interactions between triangle meshes which is very important in lots of graphic applications.
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In computer graphics there exist mainly two ways to represent 3D shapes: implicit methods and explicit methods. The explicit method is quite obvious which uses triangle meshes to represent any shape precisely, while the distinct disadvantage is hard to compute interactions between triangle meshes which is very important in lots of graphic applications.
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Statistical Properties of Encounters among Asteroids: A New, General Purpose, Formalism
Icarus, 1998Abstract The statistical properties of asteroid mutual encounters have been studied by several authors, with the main purpose of estimating collisional rates (and thus mean collisional lifetimes) and the distribution of encounter velocities. In this paper we present a new approach, conceptually not really different with respect to the classical ones,
DELL'ORO, A., PAOLICCHI, PAOLO
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Fast Generation of Optimal Asteroid Landing Trajectories Using Deep Neural Networks
IEEE Transactions on Aerospace and Electronic Systems, 2020To improve the autonomy and reliability of asteroid landings, an intelligent approach to fast and reliable generation of optimal landing trajectories is proposed. Unfortunately, the indirect methods require good initial guesses for shootings. To address this issue, deep neural networks (DNNs) are developed to approximate the costates of the indirect ...
Lin Cheng +3 more
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Generalization of Szebehely's regions for asteroid stability
Celestial Mechanics, 1985Summary: Using Hill's modified stability criterion in the three-dimensional restricted three-body problem with the Sun and Jupiter as the primaries, regions of stability for the semi-major axis (a) are determined. These regions are given for a range of eccentricity (e) and inclination (i), and include the effects of the remaining orbital elements. This
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Generalized Calibration of the Polarimetric Albedo Scale of Asteroids
Solar System Research, 2018Six different calibrations of the polarimetric albedo scale of asteroids have been published so far. Each of them contains its particular random and systematic errors and yields its values of geometric albedo. On the one hand, this complicates their analysis and comparison; on the other hand, it becomes more and more difficult to decide which of the ...
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Automated Computation of General Perturbations for the Flora Asteroidal Group
Publications of the Astronomical Society of Australia, 1991AbstractThe general perturbations of the asteroids of the Flora group (975″ < n < 1150″, n - the mean daily motion) due to Jupiter have been automatically computed on an IBM 4341 computer with the Hansen method by manipulating Broucke’s Symbolic Poisson Series Processor, and the results have been compared with that computed previously with the ...
M. F. He, null Zhangjie
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2022
<p>The impact processes are ubiquitous in the solar system, as one of the fundamental mechanisms driving the evolution of asteroids and comets<strong><sup>[1]</sup></strong>. From small meteorite impacts to gigantic Moon-forming collisions<strong><sup>[2 ...
Cem Berk Senel, Ozgur Karatekin
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<p>The impact processes are ubiquitous in the solar system, as one of the fundamental mechanisms driving the evolution of asteroids and comets<strong><sup>[1]</sup></strong>. From small meteorite impacts to gigantic Moon-forming collisions<strong><sup>[2 ...
Cem Berk Senel, Ozgur Karatekin
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Multiple near-Earth asteroid rendezvous and sample return using first generation solar sailcraft
Acta Astronautica, 2005Abstract Due to their high Δ V -capability, solar sailcraft are especially capable of performing multiple rendezvous and sample return missions to near-Earth asteroids. Even with moderate-performance solar sails of the first generation, challenging scientific missions are feasible.
Dachwald, Bernd (Prof. Dr.-Ing.) +1 more
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Rapid Generation of Time-Optimal Trajectories for Asteroid Landing via Convex Optimization
Journal of Guidance, Control, and Dynamics, 2017This paper presents a new method for rapid generation of time-optimal trajectories for asteroid landing via convex optimization.
Hongwei Yang, Xiaoli Bai, Hexi Baoyin
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