Mars 2
Space probe
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The Mars 2 was an uncrewed space probe of the Mars program, a series of uncrewed Mars landers and orbiters launched by the Soviet Union beginning 19 May 1971. The Mars 2 and Mars 3 missions consisted of identical spacecraft, each with an orbiter... Wikipedia
Launch date: May 19, 1971 at 12:22 PM EDT
Max speed: 13,420 mph
Manufacturer: Lavochkin
Apoareion altitude: 24,940 km (15,500 mi)
Landing date: 27 November 1971
Launch mass: Combined: 4,650 kg (10,250 lb); Orbiter: 3,440 kg (7,580 lb); Lander: 1,210 kg (2,670 lb)
Mission duration: 461 days