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@PhDThesis{Sanchez:2015:EsCaGr,
               author = "Sanchez, Diogo Merguizo",
                title = "Estudo de captura gravitacional e custos de manuten{\c{c}}{\~a}o 
                         orbital em din{\^a}micas n{\~a}o keplerianas",
               school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                 year = "2015",
              address = "S{\~a}o Jos{\'e} dos Campos",
                month = "2015-01-29",
             keywords = "astrodin{\^a}mica, miss{\~o}es espaciais, captura gravitacional, 
                         manuten{\c{c}}{\~a}o orbital, perturba{\c{c}}{\~o}es orbitais, 
                         astrodynamics, space missions, gravitational capture, orbital 
                         maintenance, orbital perturbation.",
             abstract = "Neste trabalho propomos a utiliza{\c{c}}{\~a}o de 
                         nano-sat{\'e}lites, atuando como sondas, para a 
                         explora{\c{c}}{\~a}o de objetos distantes do Sistema Solar, como 
                         os TNO s (sigla em ingl{\^e}s para \${{"}}\$Trans-Neptunian 
                         objects\${{"}}\$) Plut{\~a}o e Haumea. Encontramos 
                         solu{\c{c}}{\~o}es {\'o}timas para captura gravitacional de 
                         sondas por estes corpos, levando em considera{\c{c}}{\~a}o as 
                         perturba{\c{c}}{\~o}es orbitais do Sol, do potencial 
                         gravitacional destes corpos (e do potencial gravitacional de 
                         Caronte, no caso de Plut{\~a}o). Para tanto, calculamos os 
                         valores dos coeficientes do potencial gravitacional de Haumea 
                         at{\'e} grau e ordem quatro. Tamb{\'e}m consideramos a 
                         perturba{\c{c}}{\~a}o das luas que orbitam estes corpos (Hi iaka 
                         e Namaka para Haumea; Caronte, Styx, Nix, Kerberos e Hydra para 
                         Plut{\~a}o). Tais capturas ocorrem com economia de energia, 
                         j{\'a} que os corpos s{\~a}o capturados com energia de dois 
                         corpos menor que zero. Mostramos quais perturbadores s{\~a}o mais 
                         importantes para cada sistema, para determinados valores de raio 
                         do peri{\'a}pside, atrav{\'e}s do m{\'e}todo da integral da 
                         acelera{\c{c}}{\~a}o causada pelos perturbadores. Com o 
                         cruzamento dos resultados obtidos no estudo da captura 
                         gravitacional e no estudo da influ{\^e}ncia dos perturbadores, 
                         encontramos condi{\c{c}}{\~o}es iniciais que levam {\`a} 
                         captura com economia de energia e estes corpos capturados 
                         permanecem em torno do sistema por um tempo m{\'{\i}}nimo de 
                         cinco anos. {\'E} poss{\'{\i}}vel tamb{\'e}m, atrav{\'e}s do 
                         m{\'e}todo utilizado, encontrar condi{\c{c}}{\~o}es iniciais 
                         que levam a poss{\'{\i}}veis colis{\~o}es entre as sondas e 
                         corpos dos sistemas estudados. ABSTRACT: We propose the use of 
                         nano-satellites, acting as probes for the exploration of distant 
                         objects in the solar system, like the TNO s (short for 
                         \${{"}}\$Trans-Neptunian object\${{"}}\$) Pluto and Haumea. We 
                         find optimal solutions to gravitational capture of the probes for 
                         these bodies, taking into account the orbital perturbations of the 
                         sun, the gravitational potential of these bodies (and the 
                         gravitational potential of Charon, in the case of Pluto). 
                         Therefore, we calculate the values of the coefficients of the 
                         gravitational potential of Haumea to degree and order four. We 
                         also consider the perturbation of the moons which orbit these 
                         systems (Hiiaka and Namaka for Haumea; Charon, Styx, Nix, 
                         Kerberos, and Hydra for Pluto). These captures occur with energy 
                         saving, since the bodies are captured with two-body energies less 
                         than zero. We show which disturbers are more important for the 
                         system for certain periapsis radius values by the method of the 
                         integral of the accelerations caused by the disturbers. By the 
                         comparison of the results obtained from the gravitational capture 
                         study and the study on the influences of the disturbers, we found 
                         initial conditions that lead to the capture with energy saving and 
                         these probes remain trapped around the system for a minimum of 
                         five years. It is also possible, using the same method, to find 
                         initial conditions leading to possible collisions between the the 
                         probes and the bodies of the systems studied.",
            committee = "Moraes, Rodolfo Vihena de (presidente) and Prado, Antonio Fernando 
                         Bertachini de Almeida (orientador) and Yokoyama, Tadashi 
                         (orientador) and Winter, Othon Cabo and Gomes, Vivian Martins and 
                         Morais, Maria Helena Moreira and Lara, Martin",
           copyholder = "SID/SCD",
         englishtitle = "Study of gravitational capture and orbital maintenance costs in 
                         non-keplerian dynamics",
             language = "pt",
                pages = "94",
                  ibi = "8JMKD3MGP3W34P/3HQHJ72",
                  url = "http://urlib.net/rep/8JMKD3MGP3W34P/3HQHJ72",
           targetfile = "publicacao.pdf",
        urlaccessdate = "05 dez. 2020"
}


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