Russia launched a Soyuz-2.1v rocket today at 20:25 UTC from the Plesetsk Cosmodrome in Russia. The payload was the Kosmos-2558 satellite deployed into a Sun-Synchronous Orbit (SSO).
The payload is a satellite by the Russian Defense Ministry, with an unknown purpose. Kosmos is a generic filler name that is used for space assets of the former Soviet Union and now Russia. Kosmos-2558 in this case is a name for the payload that was assigned in order to not give the spacecraft’s true name and purpose.