|Mission type||ABM radar target|
|Mission duration||362 days|
|Launch mass||400 kg |
|Start of mission|
|Launch date||5 March 1968, 18:28:00 GMT|
|Launch site||Plesetsk Site 133/3|
|End of mission|
|Decay date||2 March 1969|
|Reference system||Geocentric |
|Perigee altitude||204 km|
|Apogee altitude||844 km|
|Epoch||5 March 1968|
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).
Kosmos 204 was placed into a low Earth orbit with a perigee of 204 kilometres (127 mi), an apogee of 844 kilometres (524 mi), an inclination of 70.0°, and an orbital period of 95.9 minutes. It decayed from orbit on 2 March 1969.
Kosmos 204 was the third of nineteen DS-P1-I satellites to be launched. Of these, all reached orbit successfully except the seventh, launched out of sequence.