| Full text | |
| Author(s): |
Negri, Rodolfo B.
;
Prado, Antonio F. B. A.
Total Authors: 2
|
| Document type: | Journal article |
| Source: | JOURNAL OF GUIDANCE CONTROL AND DYNAMICS; v. 47, n. 7, p. 18-pg., 2024-03-25. |
| Abstract | |
Analytical approximations are commonly employed in the initial trajectory design phase of a mission to rapidly explore a broad design space. In the context of an asteroid deflection mission, accurately predicting deflection is crucial to determining the spacecraft's trajectory that will produce the desired outcome. However, the dynamics involved are intricate, and simplistic models may not fully capture the system's complexity. This study assesses the precision and limitations of analytical models in predicting deflection, comparing them to more accurate numerical simulations. The findings reveal that encounters with perturbing bodies, even at significant distances (a dozen times the radii of the sphere of influence of the perturbing planet), can markedly disturb the deflected asteroid's trajectory, resulting in notable disparities between analytical and numerical predictions. The underlying reasons for this phenomenon are explained, and provisional general guidelines are provided to assist mission analysts in addressing such occurrences. By comprehending the impact of shallow encounters on deflection, this study equips designers with the knowledge to make informed decisions throughout the trajectory planning process, enhancing the efficiency and effectiveness of asteroid deflection missions. (AU) | |
| FAPESP's process: | 17/20794-2 - Study of dynamics, guidance and control applied to asteroid deflection |
| Grantee: | Rodolfo Batista Negri |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| 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 |
| FAPESP's process: | 21/10853-7 - Autonomous Spacecraft in Asteroid Missions |
| Grantee: | Rodolfo Batista Negri |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |