SJ-21

Intelligence Summary: SJ-21

Node Identity: SJ-21 is a technology categorized under "Hardware" in the china intelligence graph. Chinese co-orbital ASAT satellite launched October 2021. Demonstrated grappling capability by docking with and towing dead Beidou satellite in January 2022.

Research Evidence: The following findings from 1 research document reference this entity:

1. China's co-orbital ASAT program spans multiple satellite missions: SJ-12 (2010, close approaches with SJ-06F in LEO at <300m), Shiyuan-7/Tansuo-3/4/5 (2013, robotic arm testing), Shijian-17 (2016, optical/SIGINT proximity operations in GEO), TJS-3 (2018, co-orbital ASAT development), and most notably SJ-21 (October 2021).
2. SJ-21 docked with the defunct Beidou-2 G2 navigation satellite in January 2022 and towed it 3,000 km above the GEO belt — the first such demonstration by any nation other than the US.
3. The SJ-21 grappling operation was a watershed moment proving China can physically capture and relocate satellites in GEO — the most valuable orbital regime for US military communications and early warning.

Strategic Relevance: SJ-21 is a tracked entity within the china network. With 6 documented connections to other entities, this node plays a significant role in the network topology.

Network Linkage: This entity maintains 6 documented connections in the intelligence network: SJ-21 example of Co-orbital ASAT; SJ-21 executed SJ-21 Towing Operation; SJ-21 operated by PLA Aerospace Force; PLA Aerospace Force operates SJ-21; Co-orbital ASAT represented by SJ-21; SJ-21 Towing Operation executed by SJ-21.

Source Documents: Evidence compiled from: FINDINGS_FROM_research-prompts-round91.md.