Yantar-2K (Russian: Янтарь meaning amber) was a type of Soviet reconnaissance satellite which supplemented and eventually replaced the Zenit spacecraft.

It was the first satellite of the Yantar series and was managed by the Soviet military intelligence agency, the GRU.

These satellites were in orbit for 30 days and photographed sites of interest using a film camera.

It was in military service from 1978 to 1983 and was given the name Feniks (Russian: Феникс), meaning phoenix.

[2][4] The special equipment module was the part that returned to earth at the end of the mission, and contained the Zhemchug-4 (pearl) camera.

It contained most of the equipment including Kvadrat gyroscopes, telemetry systems and attitude control.

Attached to it were two film return capsules (SpK Spuskayemaya Kapsula) which were 0.8m diameter spheres.

[2][4][5] Space historian Peter Gorin estimates that the camera lens had a diameter of 600mm and a focal length of approximately 3000mm to 4000mm.