S-500 Prometheus

Russia’s strategic mobile air-defense and anti-ballistic missile system — claimed to engage ballistic missiles, hypersonic cruise weapons, and low-orbit satellites at up to 600 km and 180–200 km altitude, fielded by a single operational regiment from December 2025.

Overview

The S-500 Prometheus, also designated 55R6M “Triumfator-M,” is a road-mobile, upper-tier surface-to-air and anti-ballistic missile system developed by Almaz-Antey for the Russian Aerospace Forces. It is designed to sit above the S-400 Triumf in Russia’s layered integrated air defense, adding an exo-atmospheric and near-space engagement layer. The system combines long-range 40N6M anti-aircraft missiles and 77N6/77N6-N1 hit-to-kill interceptors intended to defeat medium-range ballistic missiles, hypersonic glide vehicles, high-altitude aircraft, and low-orbit satellites, with manufacturer-claimed detection ranges of up to 2,000 km for ballistic targets and 800 km for airborne threats, according to CSIS Missile Threat. After a protracted development that predates 2010, the first regiment was officially declared on combat duty by Russian Defense Minister Andrei Belousov on 17 December 2025, as reported by The Defense Post and Army Recognition.

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