Cosmos-2393 early-warning satellite ended its operations, bringing the number of active satellites in the space segment of the Russian early warning system down to two.
Cosmos-2393 (NORAD catalog number 27613) was launched on December 24, 2002 into a highly-elliptical orbit. It was a satellite of the 73D6 type, which are part of the US-KS early-warning system. Cosmos-2393 did not perform its regular orbit-correcting maneuver that was expected to take place in the first days of February 2007 (the last maneuver took place in November 2006). The life span of the satellite, about 50 month, is above the 40 months average for spacecraft of that type, indicating that it was a normal termination of the satellite mission.
After the Cosmos-2393 departure, the space-based segment of the Russian early-warning system is left with just two satellites - Cosmos-2422 (29260) on the highly-elliptical orbit and Cosmos-2379 (26892) on the geostationary orbit. In 2007, the Space Forces are planning to launch a new US-KS satellite into the highly-elliptical orbit. The date of the launch has not been announced yet.