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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Artificial equilibrium points and bi-impulsive maneuvers to observe 243 Ida

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de Almeida Jr, Allan Kardec ; Couto Oliveira, Geraldo Magela [1] ; Bertachini de Almeida Prado, Antonio Fernando [2]
Total Authors: 3
[1] Fed Ctr Technol Educ Minas Gerais CEFET MG, BR-30421169 Belo Horizonte, MG - Brazil
[2] de Almeida Jr, Jr., Allan Kardec, Natl Inst Space Res INPE, BR-12227010 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CHINESE JOURNAL OF AERONAUTICS; v. 34, n. 1, p. 410-423, JAN 2021.
Web of Science Citations: 0

In the restricted three-body problem, the traditional Lagrange points L-1 and L-2 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 (Delta v) 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. (C) 2020 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. (AU)

FAPESP's process: 18/07377-6 - Spacecraft motion around artificial equilibrium points
Grantee:Allan Kardec de Almeida Junior
Support Opportunities: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 19/18480-5 - Solutions for motion around artificial equilibrium points
Grantee:Allan Kardec de Almeida Junior
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 16/24561-0 - On the relevance of small bodies in orbital dynamics
Grantee:Othon Cabo Winter
Support Opportunities: Research Projects - Thematic Grants