Fig. 1. Photo of 1.2 m optical telescope of Changchun observatory

Fig. 2. Image captured by the 1.2 m optical telescope when tracking a target

Fig. 3. Block diagram of the rapid star pattern recognition algorithm described in this work

Fig. 4. Simulation diagram of triangle matching

Fig. 5. Activity diagram of the optimized triangle matching algorithm

Fig. 6. Flow chart of sequential image correction algorithm

Fig. 7. Two dimensional point maps of observation and navigation stars

Fig. 8. Changes in the constants a and b in the sequential star pattern matching

Fig. 9. Error analysis of the celestial positions of the observation stars within the film constants calculation and the respondent navigation stars

Fig. 10. Error statistics of star pattern matching for the target celestial positioning in 30 frames