Wikipedia
Yubileiny (, lit. Jubilee) is an educational Russian satellite built by NPO PM to commemorate the 50th anniversary of the launch of Sputnik 1, the first artificial satellite to be placed into Earth orbit. The satellite was launched on 23 May 2008 aboard a Rokot class rocket from the LC-133 launch facility at the Plesetsk Cosmodrome, after being delayed since the end of 2007. It was a secondary payload accompanying a cluster of three Gonets communication satellites, and utilised the excess capacity of the carrier.
The satellite mission was to broadcast audio and video about the Soviet and Russian space programmes, as well as to imitate the beeping call signals of Sputnik 1. These signals are intended for being receipted by amateur radio enthusiasts.