@Article{MeloMacaWintViei:2007:NuStAb,
               author = "Melo, Cristiano Fiorilo and Macau, Elbert Einstein Nehrer and 
                         Winter, O. C. and Vieira Neto, E.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Grupo de 
                         Din{\^a}mica Orbital e Planetologia (UNESP)} and {Grupo de 
                         Din{\^a}mica Orbital e Planetologia (UNESP)}",
                title = "Numerical study about natural escape and capture routes by the 
                         moon via lagrangian points L1 and L2",
              journal = "Advances in Space Research",
                 year = "2007",
               volume = "In press",
             keywords = "Astrodynamics, Earth-Moon Transfer, Mission Design, Orbital 
                         Maneuvers.",
             abstract = "The lunar sphere of influence, whose radius is some 66300km, has 
                         regions of stable orbits around the Moon and also regions that 
                         contain trajectories which, after spending some time around the 
                         Moon, escape and are later recaptured by lunar gravity. Both the 
                         escape and the capture occur along the Lagrangian equilibrium 
                         points L1 and L2. In this study, we mapped out the region of lunar 
                         influence considering the restricted three-body Earth-Moonparticle 
                         problem and the four-body Sun-Earth-Moon-particle (probe) problem. 
                         We identified the stable trajectories, and the escape and capture 
                         trajectories through the L1 and L2 in plots of the eccentricity 
                         versus the semi-major axis as a function of the time that the 
                         energy of the osculating lunar trajectory in the two-body 
                         Moon-particle problem remains negative. We also investigated the 
                         properties of these routes, giving special attention to the fact 
                         that they supply a natural mechanism for performing low-energy 
                         transfers between the Earth and the Moon, and can thus be useful 
                         on a great number of future missions.",
                 issn = "0273-1177",
             language = "en",
           targetfile = "numerical study.pdf",
        urlaccessdate = "01 maio 2024"
}