Artist's concept at spacecraft at the Moon.

Artist's concept of late-model Ranger spacecraft. Credit: NASA/Jet Propulsion Laboratory-Caltech

Fast Facts: Ranger 6

Ranger 6 was the closest tol success of NASA's series of lunar impact missions, but a short-circuit disabled the spacecraft before it could complete its mission.

The inoperable spacecraft impacted the Moon on target and on schedule.

Nation United States of America (USA)
Objective(s) Lunar Impact
Spacecraft P-53 / Ranger-A
Spacecraft Mass 804 Pounds (364.69 Kilograms)
Mission Design and Management NASA/Jet Propulsion Laboratory
Launch Vehicle Atlas Agena B (Atlas Agena B no. 8 / Atlas D no. 199 / Agena B no. 6008)
Launch Date and Time Jan. 30, 1964 / 15:49:09 UT
Launch Site Cape Canaveral Air Force Station, Florida / Launch Complex 12
Scientific Instruments 1. Imaging System (Six TV Cameras)

Results

This fourth American attempt to lunar impact was the closest success so far. The spacecraft, the first Block 3 type vehicle with a suite of six TV cameras, was sterilized to avoid contaminating the lunar surface.

The series would also serve as a test-bed for future interplanetary spacecraft by deploying systems (such as solar panels) that could be used for more ambitious missions. The Block 3 spacecraft carried a 381 pound (173 kilogram) TV unit (replacing the impact capsule carried on the Block 2 Ranger spacecraft). The six cameras included two full-scan and four partial-scan cameras, capable of shooting 300 pictures a minute.

Ranger 6 flew to the Moon successfully and impacted precisely on schedule at 09:24:32 UT on Feb. 2, 1964. Unfortunately, the power supply for the TV camera package had short-circuited during Atlas booster separation three days previously and left the system inoperable. The cameras were to have transmitted high-resolution photos of the lunar approach from 900 miles to 4 miles (1,448 kilometers to 6.4 kilometers) range in support of Project Apollo. Impact coordinates were 9 degrees 24 minutes north latitude and 21 degrees 30 minutes east longitude.

Source

Siddiqi, Asif A. Beyond Earth: A Chronicle of Deep Space Exploration, 1958-2016. NASA History Program Office, 2018.

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