Something concerning is happening in orbit, about 550 km above Earth. According to orbital analysis by @Marco_Langbroek and others, the Russian satellite KOSMOS 2612 has performed a series of maneuvers bringing it extremely close to ICEYE-X36, a commercial Synthetic Aperture Radar (SAR) satellite operated by the US company ICEYE. Satellites from this constellation provide radar imagery to Ukraine. This appears to be a deliberate RPO (Rendezvous and Proximity Operation), in which one spacecraft maneuvers to approach another. RPOs can be used for legitimate purposes such as satellite inspection, servicing and refueling, but they can also be used for surveillance or hostile operations. The concern is that this could be a demonstration of an ASAT (Anti-Satellite) capability. ASAT systems are designed to disable, damage or destroy satellites, potentially through physical contact, directed energy or electronic interference. Current orbital predictions suggest that the two satellites could pass within meters of each other. Such close approaches are difficult to predict precisely from publicly available orbital elements. There is currently no evidence of an actual attack, and we should be careful not to confuse a potentially hostile maneuver with a confirmed ASAT operation. Nevertheless, this is a concerning development. Modern societies increasingly depend on satellites for communication, navigation and Earth observation. The ability to approach another country’s satellite without consent raises serious questions about the security of space infrastructure. We need better independent monitoring of what happens in orbit, including optical observations from the ground. Credit to @Marco_Langbroek for tracking and documenting these maneuvers.