The ministry of defense announced today that the satellite launched on June 23, 2017 (Cosmos-2519) released a "satellite-inspector." The statement suggests that the inspector, described as a "small spacecraft,' will inspect the host satellite. The words that were used was "отечественный спутник", probably to emphasize that the satellite will not be used to approach foreign satellites.

According to Anatoly Zak of, this is the first time the Russian military confirmed an inspector mission. It is believed that the Cosmos-2499 and Cosmos-2504 missions were also small inspector satellites.

UPDATE 9/24/17: The inspector was registered by NORAD as object 42919. International designation of the satellite is 2017-037D. In Russia, it was designated as Cosmos-2521.