- In December 2013, Russia launched a trio of Rodnik military communications satellites, and a fourth unknown object, on board a Rokot/Briz-KM rocket
- The fourth object known only as Kosmos 2499 was seen by an independent observer firing its engines and performing maneuvers
- According to the observer, Kosmos 2499 has spent the last year maneuvering closer and closer to the Briz-KM upper rocket stage