The visual technology has a broad application prospect in space technology. However, the low-light condition in space will affect the quality of the image obtained by the camera. In this paper, we combine LIME with ORB-SLAM algorithms and propose an attitude estimation scheme for non-cooperative spacecrafts in low-light condition. The scheme first uses the LIME algorithm to enhance the images, so that the images can be extracted sufficient feature points. The ORB-SLAM algorithm is then used to estimate attitude of the non-cooperative target. The simulation results show that the proposed scheme can effectively estimate the attitude of non-cooperative targets in low-light condition.