Abstract:
This paper provides a comprehensive analysis of the orbital characteristics, rotation parameters, and relative motion with Earth of the near-Earth asteroid 2016 HO3 (Kamo‘oalewa). Through fitting the asteroid observed light curve, we preliminarily determined the orientation of its rotation axis as \lambda =67. 9°\pm 3. 1^\circ ,\;\beta =-46. 0°\pm 10. 6^\circ . By simulating the forthcoming Tianwen-2 space mission, we predicted changes in the apparent magnitude of the asteroid as observed by the spacecraft during its approach phase. Using the Advanced Thermophysical Model (ATPM), we performed a detailed analysis of the surface temperature distribution of asteroid 2016 HO3, revealing detailed temperature distribution features under varying thermal inertia conditions. Finally, this paper outlines future research directions, highlighting the significant potential for improved accuracy in determining the asteroid rotational parameters and orbital properties through higher-resolution observations and longer-term data accumulation. The successful implementation of the Tianwen-2 mission will provide crucial data, further advancing our understanding of the origins and evolutionary histories of asteroids.