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Deflecting an Asteroid on a Collision Course with Earth Using a Powered Swing-By Maneuver
Chagas, Bruno S.
; ; Winter, Othon Cabo (Symmetry, 2022) [Artigo]
The deflection of potentially dangerous asteroids has been treated with great intensity and has gained more and more attention in scientific research. Different techniques are developed over the years. Among these techniques, ... -
2001 SN263-the contribution of their irregular shapes on the neighbourhood dynamics
Valvano, G.; Winter, O. C. ; Sfair, R. ; Machado Oliveira, R. ; (Monthly Notices of the Royal Astronomical Society, 2022) [Artigo]
The first proposed Brazilian mission to deep space, the ASTER mission, has the triple asteroid system (153591) 2001 SN263 as a target. One of the mission's main goals is to analyse the physical and dynamical structures of ... -
Machine learning applied to asteroid dynamics
Carruba, V.; ; Domingos, R. C. ; ; Barletta, W. (Celestial Mechanics and Dynamical Astronomy, 2022) [Artigo]
Machine learning (ML) is the branch of computer science that studies computer algorithms that can learn from data. It is mainly divided into supervised learning, where the computer is presented with examples of entries, ... -
Identifying the population of stable ν6resonant asteroids using large data bases
Carruba, V; ; Domingos, R. C ; ; Martins, B (Monthly Notices of the Royal Astronomical Society, 2022) [Artigo]
Large observational surveys, like those that will be conducted at the Vera C. Rubin Observatory, are expected to discover up to one million new asteroids in the first year of operation. This will more than double the data ... -
Gravitational perturbations correlated with the asteroid kinetic impact deflection technique
Chagas, B. S.; Prado, A. F.B.A. ; Winter, O. C. (Scientific Reports, 2022) [Artigo]
This paper presents the use of the kinetic impact technique to deflect asteroids that may present some risk of collision with Earth. Within the work to be developed here, we intend to evaluate in more detail the possibility ... -
Dynamics around the binary system (65803) Didymos
MacHado Oliveira, R.; Winter, O. C. ; Sfair, R. ; Valvano, G. ; Moura, T. S. ; (Proceedings of the International Astronomical Union, 2021) [Trabalho apresentado em evento]
Didymos and Dimorphos are primary and secondary, respectively, asteroids who compose a binary system that make up the set of Near Earth Asteroids (NEAs). They are targets of the Double Asteroid Redirection Test (DART), the ... -
Chaos identification through the auto-correlation function indicator (ACFI)
Carruba, Valerio; ; Domingos, Rita C. ; ; Barletta, William (Proceedings of the International Astronomical Union, 2021) [Trabalho apresentado em evento]
Close encounters or resonances overlaps can create chaotic motion in small bodies in the Solar System. Approaches that measure the separation rate of trajectories that start infinitesimally near, or changes in the frequency ... -
Milliarcsecond Astrometry for the Galilean Moons Using Stellar Occultations
; Gomes-Júnior, A. R.; ; ; ; ; ; ; ; et al. (Astronomical Journal, 2022) [Artigo]
A stellar occultation occurs when a Solar System object passes in front of a star for an observer. This technique allows the sizes and shapes of the occulting body to be determined with kilometer precision. In addition, ... -
Explaining mercury via a single giant impact is highly unlikely
Franco, P.; ; Winter, O. C. ; Torres, K. S. ; Amarante, A. (Monthly Notices Of The Royal Astronomical Society, 2022) [Artigo]
The classical scenario of terrestrial planet formation is characterized by a phase of giant impacts among Moon-to-Mars mass planetary embryos. While the classic model and its adaptations have produced adequate analogues ... -
Influence of apophis’ spin axis variations on a spacecraft during the 2029 close approach with earth
; ; Carruba, Valerio; ; (Romanian Astronomical Journal, 2021) [Artigo]
Tumbling asteroids belong to a group of objects, whose angular velocity vector is unaligned with any of its principal axes of inertia. This rotation state leads to challenges when modelling a spacecraft's orbit around these ... -
Identification and dynamical properties of asteroid families
; ; Carruba, Valerio (Asteroids IV, 2015) [Capítulo de livro]
Asteroids formed in a dynamically quiescent disk but their orbits became gravitationally stirred enough by Jupiter to lead to high-speed collisions. As a result, many dozen large asteroids have been disrupted by impacts ... -
The fate of particles in the dynamical environment around Kuiper-Belt object (486958) Arrokoth
; Winter, O. C. (Astrophysics and Space Science, 2022) [Artigo]
The contact binary Kuiper-Belt object (486958) Arrokoth, targeted by the New Horizons mission, has a unique slope pattern, which is a result of its irregular bilobate surface shape and high spin period. Thus, some peculiar ... -
Analysis of physical phenomena associated with asteroid deect by kinetic impact
Chagas, Bruno; De A. Prado, Antonio F.B. ; Winter, Othon Cabo (Proceedings of the International Astronautical Congress, IAC, 2021) [Trabalho apresentado em evento]
We have as objective for the present work, to study the use of a kinetic impact technique as a way to deect asteroids that may present some risk of collision with the Earth at a certain moment, or even the interest in ... -
APOPHIS - Effects of the 2029 Earth's encounter on the surface and nearby dynamics
Valvano, G.; Winter, O. C. ; Sfair, R. ; MacHado Oliveira, R. ; ; Moura, T. S. (Monthly Notices of the Royal Astronomical Society, 2022) [Artigo]
The 99942 Apophis close encounter with Earth in 2029 may provide information about asteroid's physical characteristics and measurements of Earth's effects on the asteroid surface. In this work, we analysed the surface and ... -
The main perturbing objects on the orbits of (616) Prometheus and (617) Pandora
Gomes-Júnior, A. R.; Santana, T. ; Winter, O. C. ; Sfair, R. (Monthly Notices of the Royal Astronomical Society, 2022) [Artigo]
The dynamical evolution of the Prometheus and Pandora pair of satellites is chaotic, with a short 3.3 yr Lyapunov time. It is known that the anti-alignment of the apses line of Prometheus and Pandora, which occurs every ... -
Dynamics around non-spherical symmetric bodies - I. the case of a spherical body with mass anomaly
Madeira, G.; Giuliatti Winter, S. M. ; Ribeiro, T. ; Winter, O. C. (Monthly Notices of the Royal Astronomical Society, 2022) [Artigo]
The space missions designed to visit small bodies of the Solar system boosted the study of the dynamics around non-spherical bodies. In this vein, we study the dynamics around a class of objects classified by us as ... -
On the stability of additional moons orbiting Kepler-1625 b
Moraes, R. A.; ; Winter, O. C. ; Monteiro, J. (Monthly Notices of the Royal Astronomical Society, 2022) [Artigo]
Since it was proposed, the exomoon candidate Kepler-1625 b-I has changed the way we see satellite systems. Because of its unusual physical characteristics, many questions about the stability and origin of this candidate ... -
Dynamical origin of the Dwarf Planet Ceres
Ribeiro de Sousa, Rafael; ; ; Neto, Ernesto Vieira ; Izidoro, Andre ; Alves, Abreuçon Atanasio (Icarus, 2022) [Artigo]
The Dwarf Planet Ceres revealed the presence of ammonia and other unique properties compared to other asteroids in the main belt which suggests that it was not formed in situ. We model the early dynamical evolution of the ... -
The 'breaking the chains' migration model for super-Earth foation: The effect of collisional fragmentation
Esteves, Leandro; Izidoro, André ; ; ; ; ; Winter, Othon C (Monthly Notices of the Royal Astronomical Society, 2022) [Artigo]
Planets between 1 and 4 R (Earth radius) with orbital periods <100 d are strikingly common. The migration model proposes that super-Earths migrate inwards and pile up at the disc inner edge in chains of mean motion resonances. ... -
A survey on extensions of the pure gravity swing-by maneuver
Ferreira, A. F.S.; de Moraes, R. V. ; ; Winter, O. C. ; Gomes, V. M. (Revista Mexicana de Astronomia y Astrofisica, 2021) [Artigo]
The present paper surveys the more recent techniques related to the swing-by maneuver, where a spacecraft changes its energy and angular momentum by passing close to celestial bodies. It is focused on the literature related ...