Site 133, also known as Raduga[1] (Russian: Радуга meaning Rainbow), is a launch complex at the Plesetsk Cosmodrome in Russia.

The first launch from Site 133 was of a Kosmos-2I, on 16 March 1967, carrying the Kosmos 148 satellite.

There were concerns that noise generated during a launch from Site 175 at the Baikonur Cosmodrome, a silo-based complex, could cause vibrations that would damage the payload.

Rockots are wheeled up to the complex in a vertical position, and then the service tower is rolled around it.

[2] The procedure is in contrast to many other Russian and Soviet rockets, which had traditionally been assembled horizontally and then transferred to the launch site via railways.