25 August 2021: An independent satellite observer noted that during the Summer 2021, Kosmos-2542 maneuvered to re-synchronize its orbit with the USA-245 military satellite. The maneuvers resulted in multiple close encounters between the Russian and US spacecraft. On August 2, Kosmos-2542 passed as close as 34 kilometers from USA-245, and on August 13, it was within 53 kilometer from its purported target. A separate satellite observer confirmed the changes to 2542’s orbit and noted that companion satellite Kosmos-2543 also maneuvered in mid-August increasing the frequency of close approaches with USA-245.
– Kosmos-2542 has been an object of interest since its launch on 25 Nov 2019 from Plesetsk. Its original orbit was within 1° inclination from USA-245.
– Russian military sources stated Kosmos-2542 could monitor Russian satellites.
– The statement seemed to link Kosmos-2542 with a 2017 launch, which also had orbital inspection capabilities. The 2017 launch featured the subsequent release of additional satellites from the primary payload.
– On 6 Dec 2019, the Russian Ministry of Defense announced that a small sub-satellite had separated from the multi-functional platform in orbit (Kosmos-2543).
– Kosmos-2543 conducted a series of maneuvers after separation. Amateur observed strongly suggest these purposeful maneuvers placed Kosmos-2543 in an orbit to observe USA 245.
– Kosmos-2543 came within 20 km of USA 245 several times in January 2020.
– In June 2020, Kosmos-2543 made a series of maneuvers to place it into RPO with Kosmos-2535, including close approaches within 60km. A month later, the Russian Ministry of Defense issued a press report stating the two satellites had conducted a close-up study of a domestic satellite with the help of specialized equipment on a small satellite.
– On 15 Jul 2020, a small piece of orbital debris was spotted in the vicinity of the two satellites that appeared to have separated from Kosmos-2543 at a relative velocity between 140 to 186 meters per second (313 to 415 miles per hour).
– USSPACECOM characterized the event as a space based satellite weapons test and stated that the Russian satellites “displayed characteristics of a space-based weapon.”
There is little open-source information regarding the most recent Kosmos-2542/2543 maneuvers. Both satellites are likely the second iteration in the Nivelir 14F150 series. In the past 4 years Russia has deployed two “sub-satellites” at high-velocity, which suggests at least some of their LEO RPO activities are of a weapons nature. There is strong evidence Russia has embarked on a set of programs since 2010 to regain many of its Cold War-era counterspace capabilities.
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