|Mission type||Optical imaging reconnaissance|
|Mission duration||8 days|
|Launch mass||4730 kg |
|Start of mission|
|Launch date||6 May 1966, 11:02:00 GMT |
|Rocket||Vostok-2 s/n N15001-01|
|Launch site||Baikonur, Site 31/6|
|End of mission|
|Landing date||14 May 1966, 08:24 GMT |
|Reference system||Geocentric |
|Perigee altitude||205 km|
|Apogee altitude||298 km|
|Epoch||6 May 1966|
Kosmos 117 (Russian: Космос 117 meaning Cosmos 117) or Zenit-2 No.39 was a Soviet optical film-return reconnaissance satellite launched in 1966. A Zenit-2 spacecraft, Kosmos 117 was the thirty-eighth of eighty-one such satellites to be launched  and had a mass of 4,730 kilograms (10,430 lb).
Kosmos 117 was launched by a Vostok-2 rocket, serial number N15001-01, flying from Site 31/6 at the Baikonur Cosmodrome. The launch took place at 11:02 GMT on 6 May 1966, and following its successful arrival in orbit the spacecraft received its Kosmos designation; along with the International Designator 1966-037A and the Satellite Catalog Number 02163.
Kosmos 117 was operated in a low Earth orbit, at an epoch of 6 May 1966, it had a perigee of 205 kilometres (127 mi), an apogee of 298 kilometres (185 mi), an inclination of 65.0°, and an orbital period of 89.5 minutes. After eight days in orbit, Kosmos 117 was deorbited, with its return capsule descending under parachute and landing at 08:24 GMT on 14 May 1966 and recovered by Soviet force.