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Last weekend, a Russian military satellite sidled up to another spacecraft in orbit — and got closer than any uninvited visitor ever has. Kosmos-2612, launched by Russia in April with few details disclosed, spent days maneuvering around ICEYE-X36, a commercial radar-imaging satellite owned by the US subsidiary of Finnish company ICEYE whose imagery has served Ukraine's military.
Orbital trackers watched the whole encounter. Here is what the data shows, how close the two craft actually came, and why space-security experts are alarmed.
The stalk, step by step
The approach was no accident of orbital mechanics. In late September, Kosmos-2612 began a series of deliberate maneuvers to return to ICEYE-X36's orbital plane. On October 12, it changed its velocity by about 27.9 meters per second, settling into an orbit of roughly 555 kilometers — nearly identical to its target's.
Between October 15 and 19, the Russian craft closed in, shifting between positions ahead of and behind the commercial satellite. Independent tracker Jonathan McDowell reported it "stationkeeping within 5 km or less" on October 17. Then came the closest pass: Scientific American reports the two were at most a few hundred meters apart, with some estimates putting the gap within 30 meters. A Center for Strategic and International Studies analysis of tracking data puts the minimum separation at 26 meters on October 19. Space-tracking firm LeoLabs, which called it "extreme proximity," estimated roughly 500 meters while cautioning that exact figures are uncertain.
Why experts call it unprecedented
Close approaches between satellites happen — but not like this. "This appears to be the closest known deliberate and uninvited interaction between two active spacecraft in low-Earth orbit," Scientific American notes. LeoLabs called it "the most advanced and potentially dangerous uncooperative rendezvous and proximity operation we have observed."
What is new, experts say, is the target: earlier Russian shadowing involved government satellites, but ICEYE-X36 is a commercial spacecraft — and one whose radar imagery has helped Ukraine strike Russian targets. LeoLabs says the maneuvers demonstrated capabilities that "could support intelligence collection, on-orbit inspection, coercive signaling, interference, or preparation for future counterspace operations" — while stressing the observations do not establish hostile intent.
Neither Russian nor US defense officials have commented. ICEYE says it is "aware of the situation and tracking it closely." By October 18–19, Kosmos-2612 had begun moving away, and LeoLabs confirmed the close-proximity activity ended.
The episode is a warning shot in a domain with almost no traffic rules: as commercial satellites become military assets — from Ukraine's drone operations to SpaceX's orbital ambitions — the line between civilian and military targets in space is dissolving. Kosmos-2612 just showed how thin that line has become.
Should there be a "keep your distance" rule in orbit — and who would enforce it? Follow Global Insight for the science stories shaping the future.