Zond 6 (Soyuz 7K-L1 s/n 12) Operator Soviet Union Major contractors NPO Energia Company Mission type Planetary Science Launch date 10 November 1968 at 19:11:31 [GMT] Launch vehicle Proton-K/11S824 Mission duration 5.79 days Mission highlight Fly-by of Moon on 14 November 1968 at distance of 2,420km Satellite of Moon Homepage Mass 5375 kg Orbital elements Inclination 51.5° Apoapsis 400,000 km Periapsis 120 km Orbital period 500 d Instruments cosmic ray and micrometeoroid detectors, photography equipment, and a biological payload