@InProceedings{SanchezPradYoko:2014:GrCaMa,
               author = "Sanchez, Diogo Merguizo and Prado, Antonio Fernando Bertachini de 
                         Almeida and Yokoyama, Tadashi",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Estadual 
                         Paulista (UNESP)}",
                title = "Gravitational capture and maintenance of a spacecraft around 
                         pluto",
            booktitle = "Proceedings...",
                 year = "2014",
         organization = "AIAA/AAS Astrodynamics Specialist Conference.",
            publisher = "American Institute of Aeronautics and Astronautics Inc.",
              address = "San Diego, CA",
             keywords = "Astrophysics, Orbits, Gravitational capture, Gravitational 
                         potential, Initial conditions, Keplerian orbits, Perturbing 
                         forces, Pluto-Charon system, Restricted three-body problem, 
                         Velocity variations, Satellites.",
             abstract = "In this work, we study gravitational captures of a spacecraft by 
                         the Pluto-Charon system, searching configurations where the loss 
                         of energy of the spacecraft to Pluto is maximized in a time 
                         interval that keeps the viability of the mission, using the 
                         three-dimensional restricted three-body problem, taking into 
                         account the perturbation of the Pluto and Charon gravitational 
                         potentials (J2 and J22), the perturbation of the Sun and the 
                         gravity of the minor satellites of Pluto (Styx, Nix, Kerberos, and 
                         Hydra). The initial conditions which lead to captures of probes 
                         that remain in orbit around Pluto for 10 years or more will be 
                         considered as stable regions. During the gravitational capture 
                         maneuvers, some aspects will be measured in order to find the best 
                         maneuver, like the minimum energy after the capture and time 
                         consumed during the process. Those variables are important in the 
                         transfer orbit selection for this phase of the mission. Using the 
                         technique of the integral of the perturbing forces, we calculate 
                         the total velocity variation received by the spacecraft, in the 
                         stable regions, due to the Sun, Charon, the small satellites of 
                         Pluto and the J2 and J22 terms of the potential of Pluto and 
                         Charon. By the comparison between the velocity contribution of 
                         each disturber term and a Keplerian orbit around Pluto, we will be 
                         able to define which one of the disturbers are more significant, 
                         in order to make a decision about which forces need to be included 
                         in a model for a given accuracy and nominal orbit. We also will be 
                         able to find orbits that are less perturbed, requiring less 
                         station keeping maneuvers, and consequently orbits with good 
                         chances to become useful for a real mission, since these orbits 
                         come from captures.",
                 isbn = "9781624103087",
                label = "scopus 2014-11 SanchezPradYoko:2014:GrCaMa",
             language = "en",
           targetfile = "Sanchez_gravitational.pdf",
        urlaccessdate = "03 maio 2024"
}