Kosmos 17 (Russian: Космос 17 meaning Cosmos 17), also known as DS-A1 No.2 was a technology demonstration satellite which was launched by the Soviet Union in 1963. It was launched as part of the Dnepropetrovsk Sputnik programme. Its primary mission was to demonstrate technologies for future Soviet military satellites. It also conducted radiation experiments.
Kosmos 17 was placed into a low Earth orbit with a perigee of 251 kilometres (156 mi), an apogee of 658 kilometres (409 mi), 48.9 degrees of inclination, and an orbital period of 93.7 minutes. It decayed on 7 June 1965. Kosmos 17 was the second of seven DS-A1 satellites to be launched. The previous DS-A1 was Kosmos 11. The next two DS-A1 launches failed, before Kosmos 53 successfully reached orbit in January 1965. The technological experiments aboard Kosmos 17 were tests of communications and navigation systems which were later used on the GLONASS system.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.