- Manufacturer
- Jet Propulsion Laboratory / Martin Marietta
- Country of origin
- United States
- Operator
- NASA / JPL
- Applications
- Mars orbiter/lander
- Launch mass
- 3,527 kilograms (7,776 lb)
- Power
- Orbiters: 620 watts ( solar array ), Lander: 70 watts (two RTG units)
- Regime
- Areocentric
- Design life
- Orbiters: 4 years at Mars, Landers: 4–6 years at Mars
- Status
- Retired
- Retired
- Viking 1 orbiter, August 17, 1980 , Viking 1 lander, July 20, 1976 (landing) to November 13, 1982 , Viking 2 orbiter, July 25, 1978 , Viking 2 lander, September 3, 1976 (landing) to April 11, 1980
- Maiden launch
- Viking 1 , August 20, 1975
