Foton-M 4, 5

Foton-M 4

Foton-M 4 is the next generation of russian micro-gravity research satellites. While retaining the Vostok/Zenit-derived reentry module of the earlier Foton / Foton-M, the propulsion module has been replace by a Yantar type module, which provides maneuvering capabilities and longer mission support. The mission duration has been increased to up to 6 months by using solar cells for energy generation. The weight of scientific equipment has been increased by 100 kilograms.