Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Intelligent Formation of a Dynamic Working Star Catalog to Improve the Stability of a Small Spacecraft Orientation A.O. ZHUKOV, T.V. KALININ, I.N. KARTSAN, M.V. MAKAROV, А.V. MANOILO The paper considers the problem of increasing the stability of the navigation star tracking system in the orientation loop of a small spacecraft with a rigidly mounted star sensor. A method for the intelligent formation of a dynamic working star catalog is proposed, based on the ranking of candidates according to fi ve criteria: magnitude, distance to the Earth's limb, position relative to the optical axis, predicted probability of retention, and uniformity of sky coverage. The method is integrated into the control loop with a particle filter for robust orientation estimation and a Kalman filter for processing gyroscope measurements. Numerical modeling of the steady-state mode with binding to the real characteristics of the device was carried out. It is shown that the proposed approach allows to reduce the average orientation error and to reduce the share of time with a critical error in comparison with the classical proportional-integral-differential-regulator. Keywords: star sensor, spacecraft orientation, particle filter, dynamic star catalog, intelligent ranking, small spacecraft. DOI: 10.25791/pribor.6.2026.1684 Pp. 48-55.