Advances in Asteroid Dynamics

A special issue of Aerospace (ISSN 2226-4310). This special issue belongs to the section "Astronautics & Space Science".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 884

Special Issue Editors


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Guest Editor
Centre for Autonomous and Cyberphysical Systems, Cranfield University, Cranfield, UK
Interests: asteroid orbit determination; potentially hazardous asteroids; distant retrograde orbits; low-energy transfers; computer vision; logic and automated reasoning

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Guest Editor
ESRIN—ESA Centre for Earth Observation, Frascati, Italy
Interests: near-Earth asteroids; planetary science; astronomy and mathematics

Special Issue Information

Dear Colleagues,

Asteroid dynamics is a critical field within planetary sciences, focusing on the complex gravitational interactions, orbital behaviors, and physical properties of asteroids. These celestial bodies, remnants from the early solar system, allow us to understand planetary formation and evolution. The precise computation and propagation of an asteroid orbit is essential, not only for scientific purpose, but also for planetary protection. 

Recent advances in asteroid dynamics have been propelled by improvements in observational technology, computational methods, and theoretical models. These developments have provided deeper insights into the mechanisms that govern asteroid behavior, significantly enhancing our ability to predict asteroid trajectories, understand their physical characteristics, and assess potential risks to Earth.

The continued progress in the field of asteroid dynamics has opened new frontiers in space exploration and planetary science, such as the testing of new technologies and strategies for asteroid deflection and resource utilization, such as NASA's DART mission, which demonstrated our ability to change an asteroid's trajectory through kinetic impact.

Dr. Marta Ceccaroni
Dr. Marco Fenucci
Guest Editors

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Keywords

  • asteroid dynamics
  • orbit determination
  • space exploration

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Published Papers (1 paper)

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Research

25 pages, 2274 KiB  
Article
Assessment of Flyby Methods as Applied to Close Encounters among Asteroids
by Nicolò Stronati, Marco Fenucci, Marco Micheli and Marta Ceccaroni
Aerospace 2024, 11(8), 647; https://doi.org/10.3390/aerospace11080647 - 9 Aug 2024
Viewed by 664
Abstract
Orbital flybys have been extensively studied for spacecraft missions, resulting in effective mathematical and physical models. However, these models’ applicability to natural encounters involving asteroids has not been explored. This paper examines the applicability of two such theories, patched conics (PC) and the [...] Read more.
Orbital flybys have been extensively studied for spacecraft missions, resulting in effective mathematical and physical models. However, these models’ applicability to natural encounters involving asteroids has not been explored. This paper examines the applicability of two such theories, patched conics (PC) and the Keplerian map (KM), to asteroid encounters. A review of the two methods will be provided, highlighting their assumptions and range of applicability. Simulations of asteroid–asteroid encounters will then be performed to evaluate their effectiveness in these scenarios. The simulation parameters are set by collecting data on actual asteroid–asteroid encounters, hereby presented, generally characterised by high close approach distances and small masses of the perturbing bodies, if compared to those used to build the flyby theories. Results show that the PC theory’s effectiveness diminishes with increasing approach distances, aligning with its assumptions. Moreover, the prediction of the model is better in the geometric configurations where the flyby has major effects on the orbital energy change. The KM theory has shown good effectiveness for encounters occurring outside the sphere of influence of the perturbing body, even for very high distances. This research investigates flyby models’ strengths and weaknesses in asteroid encounters, offering practical insights and future directions. Full article
(This article belongs to the Special Issue Advances in Asteroid Dynamics)
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