Kosmos 283

Kosmos 283 (Космос 283 meaning Cosmos 283), known before launch as DS-P1-Yu No.19, was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was a 250 kg spacecraft, which was built by the Yuzhnoye Design Bureau, and launched in 1969 as part of the Dnepropetrovsk Sputnik programme.

Kosmos 283 was launched from Site 133/1 at the Plesetsk Cosmodrome, atop a Kosmos-2I 63SM carrier rocket. The launch occurred on 27 May 1969 at 12:59:59 UTC, and resulted in Kosmos 283's successful deployment into low Earth orbit. Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1969-047A.

Kosmos 283 was operated in an orbit with a perigee of 196 km, an apogee of 1364 km, 81.9 degrees of inclination, and an orbital period of 100.5 minutes. It remained in orbit until it decayed and reentered the atmosphere on 10 December 1969. It was the twenty-first of seventy nine DS-P1-Yu satellites to be launched, and the twentieth of seventy two to successfully reach orbit.