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Mariner 2

Space probe
Mariner 2, an American space probe to Venus, was the first robotic space probe to report successfully from a planetary encounter. The first successful spacecraft in the NASA Mariner program, it was a simplified version of the Block I spacecraft of... Wikipedia
Launch date: August 27, 1962 at 2:53 AM GMT-4
Cost: 554 million USD
Distance: 34,773 kilometers (18,776 nautical miles)
Harvard designation: 1962 Alpha Rho 1
Launch mass: 203.6 kilograms (449 lb)
Mission duration: 4 months, 7 days