COSMOS 2599 Profiled as Russian Military Communications Satellite
COSMOS 2599 is a 280 kg Russian military communications satellite in the Rodnik constellation, launched on November 25, 2025, from Plesetsk aboard an Angara-1.2 rocket. It orbits at about 1,500 km altitude with an 82.5-degree inclination, supporting low-data-rate messaging for Russian naval and strategic forces. The spacecraft is built on the Strela-3M bus by Reshetnev Information Satellite Systems.
COSMOS 2599 is part of Rodnik, a store-and-forward network for Russia's Ministry of Defense. It relays short, low-rate messages to naval and strategic users when direct line-of-sight links are unavailable. The satellite is designated Rodnik No. 34 and also cataloged as RODNIK-S 24.
Built by Reshetnev on the Strela-3M bus, the craft is compact: about 1.6 meters long, 0.8 meters wide, with solar panels spanning roughly 7 meters and a mass of 280 kilograms. It launched from Plesetsk's LC-35/1 pad on an Angara-1.2, reaching a near-circular, high-inclination orbit.
This launch may mainly affect military communications planners and maritime or strategic forces that rely on assured short messaging in high latitudes. For broader society, it could highlight the continued role of small military communications satellites in space infrastructure. Open-source tracking groups may gain another object to monitor, while analysts could study its orbit for clues about constellation upkeep.