Viking 1 and 2, NASA’s first Mars landers
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When did Viking 1 and 2 launch?
Viking 1 launched on August 20, 1975. It arrived in Mars orbit on June 19, 1976 and the lander touched down on July 20, 1976.
Viking 2 launched less than a month after Viking 1 on September 9, 1975. The spacecraft arrived in orbit on August 7, 1976 and the lander touched down on September 3.
How much did the Viking missions cost?
The Viking missions cost $1.06 billion, which when adjusted for inflation is roughly $7.1 billion in 2020 dollars. Viking remains NASA’s most expensive robotic planetary science mission of all time. More than half of Viking costs ($610 million) went to lander development, while the orbiters accounted for $217 million. Mission operations through 1982 cost $104 million.
How long did the Viking 1 and 2 missions last?
Both missions lasted far beyond their planned 90-day lifetimes. The Viking 2 orbiter mission ended July 25, 1978, while the Viking 1 orbiter lasted until August 7, 1980.
The Viking 2 lander operated until April 11, 1980, and the Viking 1 lander lasted two more years, ending on November 11, 1982.
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