88 Deep Sky Object Tracking in Partial Sky

When astronomer survey in the deep sky object, it’s necessary to take very long exposures time for light collecting. Because of the earth rotation, every star apparently moves across the sky. Hence, the guiding system is needed for star tracking. The most popular guiding system is CCD image processing feedback guiding system called Autoguider. However, for partly cloudy sky, the guiding system may be fail due to losing guide star in cloud. When the cloud goes out the guiding system cannot held star in position anymore, therefore that the imaging needs to re-image again. This paper proposes the prediction system to generate movement signal from previous movement information. These systems are combining with CCD-base guiding system so that the guiding system still functions while losing guide star. When the guide star appears again the prediction system allow to continue imaging a star object.