Enlarge / Orion, the Moon, and a crescent Earth on Monday. (credit: NASA)
The Orion spacecraft swung by the Moon on Monday, flying to within 130 km of that world's surface as it set course for a return to Earth this weekend.
In making this "powered flyby burn" to move away from the Moon, Orion's service module performed its longest main engine firing to date, lasting 3 minutes and 27 seconds. After successful completion of the maneuver, NASA's mission management team gave the "go" to send recovery teams out into the Pacific Ocean, where Orion is due to splashdown on Sunday, during the middle of the day.
By getting into an orbit around the Moon, and back out of it again during its deep space mission, Orion has now completed four main propulsive burns. This completes a big test of the spacecraft and its propulsive service module, which was built by the European Space Agency. Although a boilerplate version of Orion made a flight in 2014, it did so without a service module.
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