Hybrid Optimization Algorithm in the Photometric Inversion of Periods for Asteroids  

作　　者：Xin-Ran Li Yong-Xiong Zhang Hai-Bin Zhao Xiaoping Zhang Xiao-Ping Lu 

机构地区：[1]State Key Laboratory of Lunar and Planetary Sciences,Macao University of Science and Technology,Macao 999078,China [2]School of Computer Science and Engineering,Macao University of Science and Technology,Taipa,Macao 999078,China [3]Key Laboratory of Planetary Sciences,Purple Mountain Observatory,CAS,Nanjing 210023,China [4]CAS Center for Excellence in Comparative Planetology,CAS,Hefei 230026,China

出　　处：《Research in Astronomy and Astrophysics》2023年第5期66-77,共12页天文和天体物理学研究（英文版）

基　　金：funded by the grant from the Macao Young Scholars Program (Project code: AM201920);the National Natural Science Foundation of China (NSFC, grant No. E11903085);funded by the Science and Technology Development Fund, Macao SAR (File Nos. 0073/ 2019/A2 & 0096/2022/A);supported by the Science and Technology Development Fund, Macao SAR (File No. 0042/ 2018/A2);supported by the B-type Strategic Priority Program of CAS (Grant No. XDB41000000);the NSFC (Grant Nos. 62227901 & 11633009);Space debris and NEO research project (Nos. KJSP2020020204 & KJSP2020020102);Minor Planet Foundation。

摘　　要：Asteroids,as the primitive building blocks for the formation of our solar system,could reveal its evolution mechanism,and have attracted more and more attention from the public and professional institutions in recent years.Their physical properties,such as rotational period,spin axis and overall shape,can be inverted from ground-and space-based photometric observations.Since the inversion process is very time-consuming,this paper combines the genetic algorithm with the Levenberg–Marquardt(LM) algorithm,and presents a hybrid optimization algorithm based on a Cellinoid shape model for the inversion of rotational periods,which greatly improves the inversion efficiency.The proposed hybrid algorithm is applied to the synthetic lightcurves generated for an assumed Cellinoid shape model and the inverted rotational period results are consistent with the preset ones with a reduced search time,compared with the LM algorithm.Finally,multiple numerical experiments on the periods are performed on lightcurves and sparse observations of real asteroids to confirm that the proposed method can perform well in improving computational efficiency.

关 键 词：astrometry-methods numerical-planets and satellites fundamental parameters 

分 类 号：P185.7[天文地球—天文学]