@Article{AlmeidaJrOlivPrad:2021:ArEqPo,
               author = "Almeida Junior, Allan Kardec de and Oliveira, Geraldo Magela Couto 
                         and Prado, Antonio Fernando Bertachini de Almeida",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Centro 
                         Federal de Educa{\c{c}}{\~a}o Tecnol{\'o}gica de Minas Gerais 
                         (CEFET)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Artificial equilibrium points and bi-impulsive maneuvers to 
                         observe 243 Ida",
              journal = "Chinese Journal of Aeronautics",
                 year = "2021",
               volume = "34",
               number = "1",
                pages = "410--423",
                month = "Jan.",
             keywords = "Artificial equilibrium points, Astrodynamics, Orbital transfers, 
                         Solar radiation pressure, Solar sail.",
             abstract = "In the restricted three-body problem, the traditional Lagrange 
                         points L1 and L2 are the only equilibrium points near the asteroid 
                         243 Ida. The thrust generated by a solar sail over a spacecraft 
                         enables the existence of new artificial equilibrium points, which 
                         depend on the position of the spacecraft with respect to the 
                         asteroid and the attitude of the solar sail. Such equilibrium 
                         points generate new spots to observe the body from above or below 
                         the plane of motion. Such points are very good observational 
                         locations due to their stationary condition. This work provides a 
                         preliminary analysis to observe Ida through the use of artificial 
                         equilibrium points as spots combined with transfer maneuvers 
                         between them. Such combination can be used to observe the asteroid 
                         from more different points of view in comparison to fixed ones. 
                         The analyses are made for a spacecraft equipped with a solar sail 
                         and capable of performing bi-impulsive maneuvers. The solar 
                         radiation pressure is used both to maintain the equilibrium 
                         condition and to reduce the costs of the transfers and/or to 
                         create transfers with longer duration. This is a new aspect of the 
                         present research, because it combines the continuous thrust with 
                         initial and final small impulses, which are feasible for most of 
                         the spacecraft, because the magnitudes of the impulses are very 
                         low. These combined maneuvers may reduce the transfer times of the 
                         maneuvers in most of the cases, compared with the maneuvers based 
                         only on continuous thrust. Several options involved in these 
                         transfers are shown, like to minimize the fuel spent (\Δv) 
                         as a function of the transfer time or to extend the duration of 
                         the travel between the points. Extended transfer times can be 
                         useful when observations are required during the transfers.",
                  doi = "10.1016/j.cja.2020.07.018",
                  url = "http://dx.doi.org/10.1016/j.cja.2020.07.018",
                 issn = "1000-9361",
             language = "en",
           targetfile = "almeida jr_artificial.pdf",
        urlaccessdate = "09 maio 2024"
}