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Viking 1 orbiter.
Category. Statistic.
Launch vehicle. Titan IIIE/Centaur.
Launch date. August 20, 1975 21:22 UTC.
Launch site. N\A, USA..
Ceased operations. Operations were terminated on August 17, 1980 after 1485 orbits.
Owner(s). NASA.
Major contractor(s)  JPL.
Is it still in orbit. The orbiter still orbits Mars.
Launch mass. 883 kg (1,947 lb).
Nationality(s). American.
Satellite type. Planetary science\Mars orbiter.
Links. https://en.wikipedia.org/wiki/Viking_1 and http://nssdc.gsfc.nasa.gov/planetary/viking.html
Viking 1 orbiter lander.
Category. Statistic.
Launch vehicle. Viking 1 orbiter.
Launch date. July 20, 1976.
Launch site. Viking 1 orbiter.
Ceased operations. The lander operated for 2245 sols (about 2306 Earth days or 6 years) until November 11, 1982 (sol 2600).
Owner(s). NASA..
Major contractor(s) . Martin Marietta.
Is it still in orbit. The lander probe is till on the surface in an unknown condition.
Launch mass. 572 kg.
Nationality(s). American.
Satellite type. Planetary science\Mars lander.
Links. https://en.wikipedia.org/wiki/Viking_1 and http://nssdc.gsfc.nasa.gov/planetary/viking.html
Viking lander model

Viking lander proof test article in the National Air and Space Museum, Smithsonian Institute, Washington, D.C. Author: Mark Pelligrino.

Viking spacecraft

Viking 1 launched aboard a Titan IIIE rocket August 20, 1975 and arrived at Mars on June 19, 1976. The first month was spent in orbit around the martian planet and on July 20, 1976 Viking Lander 1 separated from the Orbiter and touched down at Chryse Planitia.

Viking 1 was the first of two spacecraft (along with Viking 2) sent to Mars as part of NASA's Viking program. It was the first spacecraft to successfully land on Mars and perform its mission, and held the record for the longest Mars surface mission of 2307 days or 2245 sols (from landing until surface mission termination, Earth time) until that record was broken by the Opportunity Rover on May 19, 2010.

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