OpenAcc Parallel Schemes for Accelerating Asteroidal Period Search

Zhang, Yongxiong; Lü, Xiaoping

doi:10.1109/sagc52752.2021.00019

Cited by 1 publication

(1 citation statement)

References 13 publications

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“…The process of inverting the physical property parameters of binary asteroids using the LM algorithm is known to be timeconsuming and may lack efficiency without parallel computing. Previous research studies (Zhang & Lu 2021;Zhang et al 2022) have demonstrated the effectiveness of using CPU-or GPU-based parallelization techniques to enhance the inversion process. Hence, parallelization technology, such as OpenMP, CUDA C, and OpenACC, is essential for achieving optimal acceleration.…”

Section: Parallelization Schemesmentioning

confidence: 99%

Modeling Binary Asteroids: Integrating Orbital and Rotational Motion for Physical Property Inversion

Lu,

Zhang,

Zhao

et al. 2024

ApJ

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The field of space science places significant emphasis on deep space exploration, with a particular focus on asteroids as a potential hazard to humanity. Inverting their physical characteristics from photometric observations is essential for uncovering their origins and evolution. This article attempts to present a solution to the challenging task of estimating the physical properties of binary asteroids, which are common in near-Earth asteroids larger than 200 meters. A novel model for binary asteroids is proposed, which integrates orbital and rotational motions to simulate brightness variations based on two Cellinoid shapes. The model combines the projection and occultation effects of the shapes to generate the simulated brightness. The inversion of determining physical properties is optimized based on the Levenberg–Marquardt algorithm through a simulation process involving several parameter corrections. Finally, the performance of the proposed model is demonstrated through numerical experiments and applications to two real binary asteroids, namely, asteroid (317) Roxane and asteroid (624) Hektor. The derived results are nearly identical to those from other publications, which confirms that the proposed model provides reliable and accurate estimations of the physical properties of binary asteroids. Additionally, this method has a potential application in supporting the development of effective strategies for the Double Asteroid Redirection Test (DART) project, the first planetary defense experiment in space undertaken by humans.

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Section: Parallelization Schemesmentioning

confidence: 99%