RSS 1.0Departamento de Matemática
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On the age of the Beagle secundary asteroid family
Carruba, V.
(Planetary and Space Science, 2018) [Artigo]
The Beagle family is a C-type subgroup of the Themis family, in the outer main belt. Previous works suggested that it could be younger than 20 Myr and a possible source for the dust in the i≃1.4∘ α zodiacal dust band. Here ... -
The quest for young asteroid families: New families, new results
Carruba, V.; De Oliveira, E. R. ; Rodrigues, B. ; Requena, I. (Monthly Notices of the Royal Astronomical Society, 2018) [Artigo]
Asteroid families form as a result of collisions. The fragments resulting from the familyforming event are ejected into orbits near that of the parent body, and then start dynamically migrating because of gravitational and ... -
Rings under close encounters with the giant planets: Chariklo versus Chiron
Araujo, R. A.N.; Winter, O. C. ; Sfair, R. (Monthly Notices of the Royal Astronomical Society, 2018) [Artigo]
In 2014, the discovery of two well-defined rings around the Centaur (10199) Chariklo was announced. This was the first time that such structures were found around a small body. In 2015, it was proposed that the Centaur ... -
Analytical study of the powered Swing-By maneuver for elliptical systems and analysis of its efficiency
Ferreira, Alessandra F. S.; ; Winter, Othon C. ; Santos, Denilson P. S. (Astrophysics and Space Science, 2018) [Artigo]
Analytical equations describing the velocity and energy variation of a spacecraft in a Powered Swing-By maneuver in an elliptic system are presented. The spacecraft motion is limited to the orbital plane of the primaries. ... -
The journey of Typhon-Echidna as a binary system through the planetary region
Araujo, R. A.N.; ; Winter, O. C. ; Sfair, R. (Monthly Notices of the Royal Astronomical Society, 2018) [Artigo]
Among the current population of the 81 known trans-Neptunian binaries (TNBs), only two are in orbits that cross the orbit of Neptune. These are (42355) Typhon-Echidna and (65489) Ceto-Phorcys. In this work, we focused our ... -
An automatic approach to exclude interlopers from asteroid families
; ; Carruba, Valerio; (Monthly Notices of the Royal Astronomical Society, 2017) [Artigo]
Asteroid families are a valuable source of information to many asteroid-related researches, assuming a reliable list of their members could be obtained. However, as the number of known asteroids increases fast it becomes ... -
The Maria asteroid family
Aljbaae, S.; Carruba, V. ; ; Domingos, R. C. ; Huaman, M. (Monthly Notices of the Royal Astronomical Society, 2017) [Artigo]
The Maria asteroid family is a group of S-type asteroids. Its location adjacent to the left side of the 3J:-1A mean-motion resonances could be the reason for the absence of the left side of the 'V' shape in the (a, 1/D) ... -
Asteroid families interacting with secular resonances
Carruba, V.; ; (Planetary and Space Science, 2018) [Resenha]
Asteroid families are formed as the result of collisions. Large fragments are ejected with speeds of the order of the escape velocity from the parent body. After a family has been formed, the fragments' orbits evolve in ... -
Analytical study of the swing-by maneuver in an elliptical system
; ; Winter, Othon C.; Santos, Denilson P. S. (Astrophysics and Space Science, 2018) [Artigo]
The objective of the present paper is to derive a set of analytical equations that describe a swing-by maneuver realized in a system of primaries that are in elliptical orbits. The goal is to calculate the variations of ... -
Particles Co-orbital to Janus and to Epimetheus: A Firefly Planetary Ring
Winter, Othon C.; Souza, Alexandre P. S. ; Sfair, Rafael ; Winter, Silvia M. Giuliatti ; Mourão, Daniela C. ; (Astrophysical Journal, 2018) [Artigo]
The Cassini spacecraft found a new and unique ring that shares the trajectory of Janus and Epimetheus, co-orbital satellites of Saturn. Performing image analysis, we found this to be a continuous ring. Its width is between ... -
Studying the energy variation in the powered Swing-By in the Sun-Mercury system
; ; Winter, O. C.; Santos, D. P.S. (Journal of Physics: Conference Series, 2017) [Trabalho apresentado em evento]
A maneuver where a spacecraft passes close to Mercury and uses the gravity of this body combined with an impulse applied at the periapsis, with different magnitudes and directions, is presented. The main objective of this ... -
Solar Power Satellite system in formation on a common geostationary orbit
Salazar, F. J.T.; Winter, O. C. (Journal of Physics: Conference Series, 2017) [Trabalho apresentado em evento]
The diurnal day-night cycle severely limits the Terrestrial solar power. To overcome this limitation, a Solar Power Satellite (SPS) system, consisting of a sunlight reflector and a microwave energy generator-transmitter ... -
Mapping stable direct and retrograde orbits around the triple system of asteroids (45) Eugenia
Araujo, R. A.N.; ; ; Winter, O. C. (Monthly Notices of the Royal Astronomical Society, 2017) [Artigo]
It is widely accepted that knowing the composition and the orbital evolution of asteroids might help us to understand the process of formation of the Solar system. It is also known that asteroids can represent a threat to ... -
Orbital transfers in an asteroid system considering the solar radiation pressure
; ; ; Gomes, Vivian Martins (Astrophysics and Space Science, 2017) [Artigo]
The present paper studies the effects of the radiation pressure in the trajectories of a spacecraft in transfers between the collinear Lagrange points of a double asteroid system. The system considered is this paper is ... -
Dynamics in the vicinity of (101955) Bennu: Solar radiation pressure effects in equatorial orbits
Chanut, T. G.G.; Aljbaae, S. ; ; Carruba, V. (Monthly Notices of the Royal Astronomical Society, 2017) [Artigo]
Here, we study the dynamical effects of the solar radiation pressure (SRP) on a spacecraftthat will survey the near-Earth rotating asteroid (101955) Bennu when the projected shadowis accounted for. The spacecraft's motion ... -
Searching for some natural orbits to observe the double asteroid 2002CE26
; ; Chiaradia, Ana Paula Marins; Gomes, Vivian Martins (Astrophysics and Space Science, 2017) [Artigo]
Knowledge of the Solar System is increasing with data coming from space missions to small bodies. A mission to those bodies offers some problems, because they have several characteristics that are not well known, like their ... -
Traveling between the earth-moon lagrangian points and the earth
; ; ; Gomes, Vivian Martins (SpaceOps 2016 Conference, 2016) [Trabalho apresentado em evento]
The idea of the present paper is to study orbital transfers for a spacecraft from the Lagrangian points in the Earth-Moon system to the Earth, as well as to the other Lagrangian points. The model used is the restricted ... -
Solar reflectors about the Sun-Earth artificial collinear equilibrium points
Salazar, F. J T; Winter, O. C. (Proceedings of the International Astronautical Congress, IAC, 2016) [Trabalho apresentado em evento]
Simple climate models help to explain the natural variability of the Earth's climate system. These models show that Earth's climate can switch from a stable warm state to a cool state and is sensitive to relative small ... -
The Hoffmeister asteroid family
Carruba, V.; ; Aljbaae, S. (Monthly Notices of the Royal Astronomical Society, 2017) [Artigo]
The Hoffmeister family is a C-type group located in the central main belt. Dynamically, it is important because of its interaction with the ν1C nodal secular resonance with Ceres, which significantly increases the dispersion ... -
On the highly inclined vW leptokurtic asteroid families
Carruba, V.; Domingos, R. C. ; Aljbaae, S. ; Huaman, M. (Monthly Notices of the Royal Astronomical Society, 2016) [Artigo]
vW leptokurtic asteroid families are families for which the distribution of the normal component of the terminal ejection velocity field vW is characterized by a positive value of the γ 2 Pearson kurtosis, i.e. they have ...