Lunar Orbiter 1 (nonfiction)

Lunar orbiter 1.

The Lunar Orbiter 1 robotic (unmanned) spacecraft, part of the Lunar Orbiter Program, was the first American spacecraft to orbit the Moon.

It was designed primarily to photograph smooth areas of the lunar surface for selection and verification of safe landing sites for the Surveyor and Apollo missions. It was also equipped to collect selenodetic, radiation intensity, and micrometeoroid impact data.

The spacecraft was placed in an Earth parking orbit on August 10, 1966, at 19:31 UTC.

The spacecraft experienced a temporary failure of the Canopus star tracker (probably due to stray sunlight) and overheating during its cruise to the Moon. The star tracker problem was resolved by navigating using the Moon as a reference, and the overheating was abated by orienting the spacecraft 36 degrees off-Sun to lower the temperature.

The spacecraft was tracked until it impacted the lunar surface on command at 7 degrees north latitude, 161 degrees east longitude (selenographic coordinates) on the Moon's far side on October 29, 1966, on its 577th orbit. The early end of the nominal one-year mission was due to the small amount of remaining attitude control gas and other deteriorating conditions and was planned to avoid transmission interference with Lunar Orbiter 2.

In the News

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  The world's first view of Earth taken by a spacecraft from the vicinity of the Moon says it is "proud to be part of the Lunar Orbiter 1 program."

Fiction cross-reference

• Crimes against mathematical constants
• Gnomon algorithm

Nonfiction cross-reference

• Spacecraft (nonfiction)

External links:

• Lunar Orbiter 1 @ Wikipedia