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Mariner 3
Mariner 3 and 4.jpg
The Mariner 3 spacecraft
Mission type Mars flyby
Operator NASA / JPL
Mission duration Launch failure
Spacecraft properties
Manufacturer Jet Propulsion Laboratory
Launch mass 260.8 kilograms (575 lb)
Power 300 watts (at Mars encounter)
Start of mission
Launch date November 5, 1964, 19:22:05 (1964-11-05UTC19:22:05Z) UTC
Rocket Atlas LV-3 Agena-D
Launch site Cape Canaveral LC-13
Orbital parameters
Reference system Heliocentric

Mariner 3 was a NASA spacecraft. It was the third spacecraft in the Mariner program. It was designed to take photos of the planet Mars after an eight month journey studying interplanetary (between planet) space. However, the spacecraft lost power eight hours after launch, and it never achieved the correct Mars trajectory. It eventually entered a heliocentric (Sun-centred) orbit.

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