Small high-precision star sensor with long service life

A small high-precision star sensor with long service life comprises a light-shielding cover, an optical system, a mechanical structure, an image sensor circuit, a control and data processing module and a posture calculating module; the light-shielding cover prevents direct light or reflective light from entering the optical system, the optical system collects navigation fixed star energy and transmits the navigation fixed star energy to the image sensor circuit, the image sensor circuit carries out energy imaging on navigation fixed star points to obtain a digital navigation fixed star map, the control and data processing circuit extracts effective image elements of the star points in the navigation fixed star map and then carries out fake star judgment and elimination to obtain the navigation fixed star points, and the posture calculating module matches the navigation fixed star points with a star table to obtain navigation fixed star posture data through recognition. The mechanical structure supports and fi