@Article{AlmeidaJrMesChiGomPra:2022:SeOrMi,
               author = "Almeida Junior, Allan Kardec de and Mescolotti, Bruna Yukiko 
                         Pinheiro Masago and Chiaradia, Ana Paula Marins and Gomes, Vivian 
                         M. and Prado, Antonio Fernando Bertachini de Almeida",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Estadual 
                         Paulista (UNESP)} and {Universidade Estadual Paulista (UNESP)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Searching for Orbits for a Mission to the Asteroid 2001SN(263 
                         )Considering Errors in the Physical Parameters",
              journal = "Symmetry-Basel",
                 year = "2022",
               volume = "14",
               number = "9",
                pages = "e1789",
                month = "Sept.",
             keywords = "astrodynamics, asteroid 2001SN263, errors in the physical 
                         parameters, observational, mission, Aster mission.",
             abstract = "The main goal of this paper is to search for orbits that can be 
                         used in the Brazilian proposed Aster mission. This mission is 
                         under study and its objective is to use a spacecraft to observe 
                         the system 2001SN263, which is a triple asteroid system. With 
                         respect to the two-body problem (spacecraft and the main 
                         asteroid), the symmetries of the orbits are broken by the 
                         oblateness of the main body of the system, the solar radiation 
                         pressure, and the gravitational attraction of the two moons of the 
                         main body. Additionally, the masses of these two moons have errors 
                         associated with their predicted values, which reinforce the 
                         asymmetry and require extra effort to maintain the observational 
                         objectives of the mission. The idea is to find orbits that remain 
                         for some time observing the three bodies of that system, even if 
                         the physical parameters of the bodies are not the ones expected 
                         from observations made from the Earth. This is accomplished by 
                         studying the effects of errors in all the physical properties of 
                         the three asteroids in the trajectories described by a spacecraft 
                         that is orbiting this system. Several important and useful 
                         trajectories are found, which are the ones that can observe the 
                         desired bodies, even if the physical parameters are not the 
                         expected ones. To express our results, we built time histories of 
                         the relative distances between each of the asteroids and the 
                         spacecraft. They are used to select the trajectories according to 
                         the amount of time that we need to observe each body of the 
                         system. In this way, the first objective of this research is to 
                         search for trajectories to keep the spacecraft close to the three 
                         bodies of the system as long as possible, without requiring 
                         orbital maneuvers. The errors for the masses of the two smaller 
                         and lesser known bodies are taken into consideration, while the 
                         mass of the most massive one is assumed to be known, because it 
                         was determined with higher precision by observations.",
                  doi = "10.3390/sym14091789",
                  url = "http://dx.doi.org/10.3390/sym14091789",
                 issn = "2073-8994",
             language = "en",
           targetfile = "symmetry-14-01789-v2.pdf",
        urlaccessdate = "01 maio 2024"
}