On this day, 32 years ago, on December 25, 1993 (November 13, 1993, the lunar calendar), China scientists successfully tracked an out-of-control recoverable satellite. On December 25, 1993, Xinhua Agency reported that the satellite tracking and observation system of China Academy of Sciences had successfully captured a recoverable satellite that lost control more than two months ago. Researchers estimate that the satellite, which is currently under close monitoring by scientists, will remain in space for another 15 months. Previously, foreign countries had reported that China's lost control satellite. Analysis by the Human Satellite System of the Chinese Academy of Sciences believes that what fell was the satellite's instrument module, and the recovery module was still in orbit. On October 8, 1993, the 15th recoverable satellite launched by China lost control during re-entry. After the satellite's orbit was changed, China's tracking and control radar measured a circle and determined a set of orbital elements on October 16. In the next few days, the satellite was no longer seen for various reasons. On October 20, the Chinese Academy of Sciences launched its satellite observation network and began tracking the satellite. That night, Nanjing and Urumqi observation stations intercepted the satellite and obtained observation data, providing the satellite's light-changing characteristics. It has been verified that the light-changing characteristics are consistent with the characteristics that the star has an aluminum-plated surface and a black or green surface on the cone, so the observation target is determined to be correct. From October 20 to October 27, the Chinese Academy of Sciences Human Health System provided daily observation data. Since November 5, the Changchun Satellite Observatory of the Chinese Academy of Sciences has obtained additional observation data. Starting from November 6, the Chinese Academy of Sciences Human Satellite System has integrated observation data from Kunming, thereby lengthening the observation arc and setting a better orbit. Researchers from the Chinese Academy of Sciences said that the acquisition and orbit determination of the satellite have been successfully completed. From the aspects of orbit, variable light characteristics, and the consistency of the measured surface mass with the weight and shape of the star, it shows that the captured target is correct.