Id: 81

Published: 07/29/2025

Description:

Shijian-21 (SJ-21) and Shijian-25 (SJ-25) were observed conducting rendezvous and proximity operations in geosynchronous orbit during June-July 2025, featuring multiple close approaches and appearing visually merged in optical data from July 2-6, suggesting a possible docking given the extended duration. From early to mid-June, the satellites made various small adjustments, with separations varying widely, and a U.S. monitoring satellite adjusted position to observe the activities, indicating interest in what could be a pioneering on-orbit refueling effort. Post-interaction possibilities include repositioning for further support roles or demonstrations, potentially enabling new orbital strategies through enhanced fuel management and plane alterations that were previously fuel-prohibitive.