@InProceedings{WinterAraúPradSukh:2011:StReAr,
               author = "Winter, O. C. and Ara{\'u}jo, Rosana Aparecida Nogueira and 
                         Prado, Antonio Fernando Bertachini de Almeida and Sukhanov, 
                         Alexander",
          affiliation = "{Universidade Estadual Paulista (UNESP)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Aster mission: stability regions around the triple asteroid 2001 
                         SN263",
            booktitle = "Proceedings...",
                 year = "2011",
         organization = "International Symposium on Space Flight Dynamics, 22.",
             keywords = "Mission design, orbital stability, asteroids.",
             abstract = "The celestial body 2001 SN263 is a near Earth asteroid (NEA) with 
                         semi-major axis 1.985 A.U., eccentricity 0.48 and orbital 
                         inclination 6.7 degrees. Light-curves obtained in the Observatory 
                         of Haute-Provence, in January 2008, lead to the conclusion that 
                         this asteroid was a binary system. In February 2008 the system was 
                         observed along 16 days by the radio-astronomy station of Arecibo, 
                         in Porto Rico. These observations resulted in the discovery that 
                         2001 SN263 is a triple system [1]. The components of the system 
                         have diameters of about 2.8 km, 1.2 km and 0.5 km. With respect to 
                         the major body, the second component has a semi-major axis of 
                         about 17 km (period of 147hrs) and the third component has a 
                         semi-major axis of about 4 km (period of 46hrs) [2]. This triple 
                         system is the target of the first brazilian mission to an 
                         asteroid. In order to design a mission to explore this interesting 
                         triple asteroid system, it was made a study of the stability 
                         regions around each one of the three components and around the 
                         whole system. This system has a quite complex dynamics. The 
                         perturbations among the three components are not negligible, since 
                         the bodies are of comparable sizes. In our numerical simulations 
                         we also took into account the perturbations of the Sun, Jupiter, 
                         Mars and Earth. In this work we present the location and size of 
                         the stable regions. We used a Gauss-Radau numerical integrator 
                         [3]. Part of these results can be seen in Figure 1, where it is 
                         shown how long the trajectory survived before being ejected or 
                         collide with one of bodies. It was considered a grade o semi-major 
                         axis versus eccentricity around the two larger bodies of the 
                         system, named Asteroid 1 and Asteroid 2. Then, we will show some 
                         possible approaches to insert and keep a spacecraft exploring this 
                         system.",
  conference-location = "S{\~a}o Jos{\'e} dos Campos, SP",
      conference-year = "24 Feb. - 4 Mar.",
             language = "en",
           targetfile = "winter_aster.pdf",
        urlaccessdate = "12 maio 2024"
}