Kosmos 204 (Russian: Космос 204 meaning Cosmos 204), also known as DS-P1-I No.3 was a satellite which was used as a radar target for anti-ballistic missile tests. It was launched by the Soviet Union in 1968 as part of the Dnepropetrovsk Sputnik programme. and had a mass of 400 kilograms (880 lb). It was launched aboard a Kosmos-2I 63SM rocket, from Site 133/1 at Plesetsk. The launch occurred at 18:28:00 GMT on 5 March 1968. Kosmos 204 was the third of nineteen satellites to be launched. Of these, all reached orbit successfully except the , launched out of sequence.