The Russian military says it successfully placed three classified communications satellites into orbit today, along with the upper stage of the rocket that put them there. But according to the U.S. military’s Combined Space Operations Center, or CSpOC, a fifth object, possibly another, unannounced satellite, may have hitched a ride into space on the launch.
The Rokot/Briz-KM launch vehicle blasted off from Pad 3 at Site 133 at the Plesetsk Cosmodrome in Western Russia at just before 5:30 PM local time on Nov. 30, 2018, according to RussianSpaceWeb.com. At approximately 7:12 PM, the three Rodnik communications satellites had deployed into their assigned orbits. Russia has named the trio of satellites Kosmos-2530, Kosmos-2531, and Kosmos-2532.
This would all be rather banal had the CSpoC, as well as the U.S.-Canadian North American Aerospace Defense Command (NORAD), not recorded the launch slightly differently. Information on Space-Track.org, a U.S. government website that publicly releases data on space launches from the CSpoC and NORAD, listed Objects A through E as resulting from the launch from Plesetsk. This would include the three satellites and the upper stage, but the fifth object is unexplained.
It is possible that the upper stage simply fragmented into multiple pieces that were large enough for the U.S. military to track independently. Three of the objects – A through C – have essentially same perigee, the point in their orbit at which they are nearest to the earth. The other two objects – D and E – share a different general perigee.
SOURCE: The Drive, by JOSEPH TREVITHICK