The launch of the CAPSTONE cubesat lunar mission has been postponed to May 31st

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The launch of the CAPSTONE cubesat lunar mission has been postponed to May 31st

“We will regularly examine the date for the first target launch attempt during the launch period, which continues to June 22,” agency officials stated in the Artemis moon program blog on Wednesday (May 11). The post did not explain why the launch was delayed.

The planned orbit will bring CAPSTONE within 1,000 miles (1,600 kilometers) of a lunar pole at its closest, providing access to the south pole. That’s the main target for the crewed Artemis missions, given the likely presence of water ice in permanently shadowed polar craters.

Complicating matters is the moon has known mascons (mass concentrations) that may perturb orbits. So NASA is seeking an inexpensive test before sending the much more expensive Gateway to such an orbit.

At its highest altitude, CAPSTONE will swing 43 times higher to 43,500 miles (70,000 km). The advantage of such an orbit is that future spacecraft coming to and from the lunar surface at the south pole won’t need to fly as high to meet up with Gateway, but the halo orbit has not been tested yet by other spacecraft.

Story Highlights

  • The CAPSTONE mission, which stands for “Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment,” has been pushed back four days to no early than May 31, according to NASA.

  • The microwave-oven-sized CAPSTONE spacecraft will launch from New Zealand aboard a Rocket Lab Electron rocket with a Lunar Photon upper stage. It mission is to verify the stability of a near rectilinear halo orbit (NRHO) around the moon, modeling what Gateway — the small moon-orbiting space station that’s a key part of the Artemis plan — will need to follow with astronauts on board.

CAPSTONE’s secondary mission is to assess spacecraft-to-spacecraft navigation and communications systems with NASA’s Lunar Reconnaissance Orbiter, which has been circling the moon since 2009. CAPSTONE was initially supposed to fly in 2021, but the mission was delayed from then due to COVID-related issues.