Abstract
In this paper, we propose a computational method for rapidly estimating the gravitational acceleration of irregular asteroids: the pseudocenter theory, triangular mesh, kriging interpolation (PTK) method. The method first uses a triangular mesh to discretize the asteroid's surface. Then, the fitting coefficients of all grid point directions are obtained using pseudocenter theory. Finally, kriging interpolation is used to quickly estimate the gravitational acceleration value at any location. Numerical simulation shows that the PTK method can ensure a high calculation speed, wide application range, and high accuracy with an extremely low storage cost. Overall, the PTK method is more balanced, faster, and more feasible than current methods for calculating gravitational acceleration for on-orbit use.
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Funding
This research is supported by the Beijing Municipal Science and Technology Commission (Z181100002918004), Space Science Pre-Research Project (XDA15014900), Civil Aerospace Pre-Research Project (Grant No. kjsp2020020101). The corresponding author is supported by the Youth Innovation Promotion Association CAS.
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Zhang, S., Li, M. A fast method of estimating the gravitational acceleration of asteroids with irregular shapes. Celest Mech Dyn Astron 135, 2 (2023). https://doi.org/10.1007/s10569-022-10117-0
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DOI: https://doi.org/10.1007/s10569-022-10117-0