Sensitivity analysis of the orbital motion around 469219 Kamo’oalewa (2016 HO3) to uncertainties on asteroid mass and solar radiation pressure

Feng, Jinglang; Hou, Xiyun; Lizia, P. Di; Armellín, Roberto; Santeramo, Daniele Antonio

doi:10.1016/j.asr.2021.11.035

Cited by 8 publications

(2 citation statements)

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“…Therefore, recently there has been several developments on indicators that can incorporate uncertainties and stochastic effects (see e.g. [41], [42], and [43]). In this work, the pseudo-diffusion indicator developed in [23] is used to characterise the dynamics of ballistic landings on Dimorphos.…”

Section: B Pseudo-diffusion Indicatormentioning

confidence: 99%

Robust Trajectory Design for Ballistic Landings on Dimorphos

Fodde

Feng

Vasile

2022

AIAA SCITECH 2022 Forum

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ESA's Hera mission is planning to land a probe on the surface of the secondary body of the Didymos binary asteroid system, called Dimorphos, using a ballistic landing strategy. Ballistic landings can be sensitive to uncertainties in the deployment of the lander and the environment models. Thus, the design of the ballistic landing trajectory needs to take into consideration both the minimization of the touchdown velocity and the robustness of the trajectory against uncertainties. In this research, a landing trajectory design algorithm that accomplishes both these tasks is developed. This is done using the Generalised Intrusive Polynomial Algebra (GIPA) method to propagate the uncertainties through the dynamical system. A novel addition to GIPA is introduced, which is able to obtain the probability distribution of the spacecraft state over time. The landing trajectory design method is tested using several different landing area sizes and locations. It is found that there is a large difference between the found minimal touchdown velocities between landing locations. Furthermore, a larger allowed landing area results in more deployment states being allowed, at the expense of higher touchdown velocities. The algorithm developed here thus allows for the design of robust ballistic landing trajectories for landing on small bodies like Dimorphos.

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Section: B Pseudo-diffusion Indicatormentioning

confidence: 99%

Robust Trajectory Design for Ballistic Landings on Dimorphos

Fodde

Feng

Vasile

2022

AIAA SCITECH 2022 Forum

View full text Add to dashboard Cite

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“…This technique was able to analyse the effects of non-spherical gravity uncertainties, and found that the motion is sensitive to variations in the 𝐶 22 term. Further analyses on the effect of uncertain SRP and asteroid mass was performed in [12,13]. These studies highlighted the importance of accounting for the effect of uncertainties on the stability of orbits around an asteroid.…”

Section: Introductionmentioning

confidence: 99%