ESA’s NEO Coordination Centre reported in its September 2026 newsletter that the risk list had risen to 2,005 near-Earth asteroids, despite the normally slower discovery rate during Northern Hemisphere summer. The same inventory recorded 42,238 known near-Earth asteroids and 124 near-Earth comets as of the reporting period. The list includes every known object with a computed non-zero impact probability, usually very low, and changes as new observations add objects or eliminate previously calculated risks.[1][2]
The total is a surveillance metric, not a count of imminent catastrophes: risk-list entries can result from uncertain preliminary orbits and may later be removed after follow-up observations. Nevertheless, the expanding catalogue demonstrates that impact risk is dynamic and that civilisational preservation requires persistent observation, orbit refinement, impact-probability analysis, and response capability. A lunar archive could survive an Earth impact more readily than terrestrial infrastructure, but launch systems, communications, logistics, and Earth-based industrial support could be severely disrupted; large lunar impacts also remain a direct habitat and repository hazard.[1][3][6]
Integrate ESA NEOCC risk-list ingestion into Ark threat monitoring, with automated alerts for objects whose impact dates, sizes, probabilities, Palermo Scale values, or approach velocities cross mission-defined thresholds. Preserve monthly snapshots and orbital histories, fund independent optical and radar follow-up, and model both Earth-impact disruption and direct lunar-impact scenarios. Treat the September 2026 count of 2,005 as a baseline for measuring surveillance growth rather than as a standalone danger indicator.[1][3]