RSS 1.0Departamento de Matemática
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The 2014–2015 Brazilian mutual phenomena campaign for the Jovian satellites and improved results for the 2009 events
; ; ; ; ; ; ; Sfair, R.
; Winter, O. C. ; et al. (Planetary and Space Science, 2019) [Artigo]
Progress in astrometry and orbital modelling of planetary moons in the last decade enabled better determinations of their orbits. These studies need accurate positions spread over extended periods. We present the results ... -
Sun-synchronous solar reflector orbits designed to warm Mars
Salazar, F. J.T.; Winter, O. C. (Astrophysics and Space Science, 2019) [Artigo]
Although the Martian environment is very cold (averaging about − 60 ∘ C), highly oxidizing and desiccated, several studies have proposed human colonization of Mars. To carry out this ambitious goal, terraforming schemes ... -
First stellar occultation by the Galilean moon Europa and upcoming events between 2019 and 2021
; ; Gomes-Júnior, A. R.; ; ; ; ; ; ; et al. (Astronomy and Astrophysics, 2019) [Artigo]
Context. Bright stellar positions are now known with an uncertainty below 1 mas thanks to Gaia DR2. Between 2019-2020, the Galactic plane will be the background of Jupiter. The dense stellar background will lead to an ... -
Orbital stability near the (87) Sylvia system
; ; ; Carruba, V.; ; ; (Monthly Notices of the Royal Astronomical Society, 2019) [Artigo]
The main goal of our work is to study the orbital dynamics of a spacecraft near the (87) Sylvia system. Here, we consider a non-homogeneous mass distribution with a dense core inside the primary asteroid. The Mascon gravity ... -
The PDS 110 observing campaign - photometric and spectroscopic observations reveal eclipses are aperiodic
(Monthly Notices of the Royal Astronomical Society, 2019) [Artigo]PDS 110 is a young disc-hosting star in the Orion OB1A association. Two dimming events of similar depth and duration were seen in 2008 (WASP) and 2011 (KELT), consistent with an object in a closed periodic orbit. In this ... -
Tethered slingshot maneuver in the three-dimensional space
Ferreira, Alessandra F.S.; Moraes, Rodolpho V. ; ; Winter, Othon C. (Proceedings of the International Astronautical Congress, IAC, 2018) [Trabalho apresentado em evento]
The Tethered Slingshot maneuver (TSSM) is an alternative solution to maneuver a spacecraft in space, which is based in the use of cables. A space tether usually consists in two fixed objects at the end of a cable. In this ... -
On the location of the ring around the dwarf planet Haumea
Winter, O. C.; Borderes-Motta, G. ; Ribeiro, T. (Monthly Notices of the Royal Astronomical Society, 2019) [Artigo]
The recently discovered ring around the dwarf planet (136108) Haumea is located near the 1:3 resonance between the orbital motion of the ring particles and the spin of Haumea. In the current work, we study the dynamics of ... -
APPROX – Mutual approximations between the Galilean moons: The 2016–2018 observational campaign
; ; ; ; ; Sfair, R.; ; ; ; et al. (Monthly Notices of the Royal Astronomical Society, 2019) [Artigo]
The technique of mutual approximations accurately gives the central instant of the maximum apparent approximation of two moving natural satellites in the plane of the sky. This can be used in ephemeris fitting to infer the ... -
The resonant population of asteroids in librating states of the υ6 linear secular resonance
Huaman, M.; ; Carruba, V. ; Domingos, R. C. ; Aljbaae, S. (Monthly Notices of the Royal Astronomical Society, 2018) [Artigo]
We discuss the asteroid population evolving close by or into the υ6 secular resonance in the main asteroid belt. Using the analytical method of Yoshikawa, we estimate the actual domain of the υ6 resonance, which currently ... -
Orbital effects in a cloud of space debris making a close approach with the earth
Formiga, Jorge Kennety S.; Gomes, Vivian Martins ; (Computational and Applied Mathematics, 2018) [Artigo]
The present paper has the goal of studying the changes of the orbital parameters of each individual element of a cloud of particles that makes a close approach with the Earth. Clouds of particles are formed when natural ... -
Comparison between Laplace-Lagrange secular theory and numerical simulation: the case of υ Andromedae planetary system
Camargo, Barbara C. B.; Winter, Othon C. ; (Computational and Applied Mathematics, 2018) [Artigo]
The large increase in exoplanet discoveries in the last two decades showed a variety of systems whose stability is not clear. In this work, we chose the υ Andromedae system as the basis of our studies in dynamical stability. ... -
Collecting solar power by formation flying systems around a geostationary point
Salazar, F. J.T.; Winter, O. C. ; (Computational and Applied Mathematics, 2018) [Artigo]
Terrestrial solar power is severely limited by the diurnal day–night cycle. To overcome these limitations, a Solar Power Satellite (SPS) system, consisting of a space mirror and a microwave energy generator-transmitter in ... -
The influence of Ceres on the dynamical evolution of the Zdenekhorsky/Nemesis asteroid family
Carruba, V.; Barletta, W. (Planetary and Space Science, 2019) [Artigo]
The Nemesis family, also identified as the Zdenekhorsky family by some authors, is an “incomplete” asteroid family in the central main belt, characterized by an asymmetric distribution between its left and right side, with ... -
Building an “Escape Portal” with Tethers Fixed in Asteroids
; Gomes, Vivian Martins; Chanut, Thierry Gregory Gil (Journal of the Astronautical Sciences, 2018) [Artigo]
The main idea of this paper is to propose the construction of an “Escape Portal” to send a spacecraft to the exterior planets, or even to make it escape from the Solar System, using a Tethered Sling Shot Maneuver (TSSM) ... -
Dynamical effects on the classical Kuiper belt during the excited-Neptune model
Ribeiro de Sousa, Rafael; ; ; Vieira Neto, Ernesto (Icarus, 2018) [Artigo]
The link between the dynamical evolution of the giant planets and the Kuiper Belt orbital structure can provide clues and insight about the dynamical history of the Solar System. The classical region of the Kuiper Belt has ... -
The dynamics of the outer edge of Saturn's A ring perturbed by the satellites Janus and Epimetheus
Araujo, N. C.S.; ; ; ; ; ; Neto, E. Vieira (Monthly Notices of the Royal Astronomical Society, 2019) [Artigo]
We present an analytical model to study the dynamics of the outer edge of Saturn's A ring. The latter is influenced by 7:6 mean motion resonances with Janus and Epimetheus. Because of the horseshoe motion of the two ... -
Pombaline reform and the rise of mathematics education to a higher level
Mondini, Fabiane; Viggiani Bicudo, Maria Aparecida (Acta Scientiae, 2018) [Artigo]
The purpose of this research is to understand the orientation given to the teaching of Mathematics, by the Pombaline Reform of 1772, which modifies the statutes of the University of Coimbra, in Portugal. It is a qualitative ... -
Machine-learning identification of asteroid groups
Carruba, V.; ; Lucchini, A. (Monthly Notices Of The Royal Astronomical Society, 2019) [Artigo]
Asteroid families are groups of asteroids that share a common origin. They can be the outcome of a collision or be the result of the rotational failure of a parent body or its satellites. Collisional asteroid families have ... -
Planar powered Swing-By maneuvers to brake a spacecraft
; ; Winter, Othon C. (Computational & Applied Mathematics, 2018) [Artigo]
The Swing-By maneuver is a technique used in many space mission to modify the trajectory of a spacecraft. The most usual goal is to increase the energy of the spacecraft, but it is also possible to reduce this energy. An ... -
Celestial mechanics, spacecrafts, and 50th years of the first humans on the Moon
Gomes, Vivian Martins; ; ; ; Winter, Othon Cabo (Computational & Applied Mathematics, 2018) [Artigo]
Aerospace engineering is a relatively new topic in engineering. It deals with several aspects of activities related to space. It includes Astrodynamics, which is a field that studies the motion of spacecraft, like guidance ...