A method based on sub-pixel correlation algorithm for star center is proposed.With correlation matching method, the star center is located to sub-pixel level to raise centroid accuracy.

• 因此，提出了一种基于亚像元相关法的星像质心算法这种算法是利用互相关匹配实现图像定位的原理，将星像质心定位到亚像素上来提高质心精度。