Volume 43 Issue 3
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Article Navigation >  Chinese Journal of Space Science  > 2023  >  43(3): 507-520 Open Access
ZHANG Shidong, LI Mingtao. Global Search Strategy for Periodic Orbit near an Irregular Asteroid (in Chinese). Chinese Journal of Space Science, 2023, 43(3): 507-520 doi: 10.11728/cjss2023.03.220106002
Citation: ZHANG Shidong, LI Mingtao. Global Search Strategy for Periodic Orbit near an Irregular Asteroid (in Chinese). Chinese Journal of Space Science, 2023, 43(3): 507-520 doi: 10.11728/cjss2023.03.220106002
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Global Search Strategy for Periodic Orbit near an Irregular Asteroid

doi: 10.11728/cjss2023.03.220106002 cstr: 32142.14.cjss2023.03.220106002

  • University of Chinese Academy of Sciences, Beijing 100049

  • National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • Received Date: 2022-01-06
  • Accepted Date: 2022-03-18
  • Rev Recd Date: 2023-02-13
    • Available Online: 2023-04-19
    Abstract
  • Natural periodic orbits around irregular asteroids can help us better understand the dynamics of asteroids. The search process of periodic orbit requires frequent orbit recursion, and most of the calculation time is consumed in the calculation of gravitational acceleration near irregular asteroids. In order to improve the efficiency of acceleration calculation, a new fast estimation method for gravitational acceleration of irregular asteroids is proposed. On this basis, the initial guess of periodic orbits is obtained by random rough search in parameter space. Finally, genetic algorithm is used to find the initial value of periodic orbit. By searching the periodic orbits of irregular asteroid 433 Eros, the periodic orbits of different shapes near the asteroid are classified, and the distribution of periodic orbits near the asteroid is analyzed.

     

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