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Mariner 4
Mariner 3 and 4.jpg
The Mariner 4 spacecraft
Mission type Mars flyby
Operator NASA / JPL
Mission duration 3 years, 23 days
Spacecraft properties
Manufacturer Jet Propulsion Laboratory
Launch mass 260.8 kilograms (575 lb)
Power 310 watts (at Mars encounter)
Start of mission
Launch date November 28, 1964, 14:22:01 (1964-11-28UTC14:22:01Z) UTC
Rocket Atlas LV-3 Agena-D
Launch site Cape Canaveral LC-12
End of mission
Last contact December 21, 1967
Orbital parameters
Reference system Heliocentric
Semi-major axis 199,591,220 kilometers (124,020,230 mi)
Eccentricity 0.17024754
Perihelion 165,611,300 kilometers (102,906,100 mi)
Aphelion 233,571,130 kilometers (145,134,370 mi)
Inclination 2.51 degrees
Period 562.888 days
Flyby of Mars
Closest approach July 15, 1965, 01:00:57 UTC
Distance 9,846 kilometers (6,118 miles)

Mariner 4 was a NASA spacecraft. It was the fourth spacecraft in the Mariner program. It was sent on a Mars flyby mission. It was the first successful mission to Mars. The spacecraft was launched on November 28, 1964 at Cape Canaveral Air Force Station. Mariner 4 reached Mars after an eight-month journey. The spacecraft became the first spacecraft to take close-up photographs of another planet. The spacecraft also had other instruments to study the atmosphere of Mars.

The total cost of the Mariner 4 mission is estimated at $83.2 million. Total research, development, launch, and support costs for the Mariner series of spacecraft (Mariners 1 through 10) was approximately $554 million.

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See also

Kids robot.svg In Spanish: Mariner 4 para niños

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