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IEEE Transactions on Cybernetics, 2022
As an increasing number of asteroids are being discovered, detecting them using limited propulsion resources and time has become an urgent problem in the aerospace field. However, there is no universal fast asteroid sequence selection method that finds the trajectories for multiple low-thrust spacecraft for detecting a large number of asteroids ...
Naiming Qi +4 more
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As an increasing number of asteroids are being discovered, detecting them using limited propulsion resources and time has become an urgent problem in the aerospace field. However, there is no universal fast asteroid sequence selection method that finds the trajectories for multiple low-thrust spacecraft for detecting a large number of asteroids ...
Naiming Qi +4 more
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AstroGen – Procedural Generation of Highly Detailed Asteroid Models
2018 15th International Conference on Control, Automation, Robotics and Vision (ICARCV), 2018We present a novel algorithm, called AstroGen, to procedurally generate highly detailed and realistic 3D meshes of small celestial bodies automatically. AstroGen gains it's realism from learning surface details from real world asteroid data. We use a sphere packing-based metaball approach to represent the rough shape and a set of noise functions for ...
Xi-Zhi Li, Rene Weller, Gabriel Zachmann
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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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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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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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Asteroid long-periodic perturbations: generic term representation of the determining function
Planetary and Space Science, 1994Abstract A simple scheme is introduced for representing, in a computer readable form, the determining function of the canonical transformation needed to compute the asteroid long-periodic perturbations. The theory and the procedures involved in this computation are described in detail.
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