Japan’s “Moon Sniper” lunar lander made pinpoint touchdown but battery woes persist, space agency says

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Japan’s “Moon Sniper” craft landed around 55 meters (180 feet) from its target, the country’s space agency said Thursday as it released the first images from the mission.

The unmanned Smart Lander for Investigating Moon (SLIM), dubbed the “Moon Sniper” for its pinpoint technology, had the goal of touching down within 100 meters (330 feet) of a specific landing spot.

Press conference on the Smart Lander for Investigating Moon (SLIM)'s moon landing mission, in Tokyo
Journalists look at a screen showing an image taken by LEV-2 on the moon, at the Japan Aerospace Exploration Agency (JAXA)’s news conference on the Smart Lander for Investigating Moon (SLIM)’s moon landing mission, in Tokyo, on Jan. 25, 2024.

KIM KYUNG-HOON / REUTERS


That’s much more precise than the usual landing zone of several kilometers.

“SLIM succeeded in a pinpoint soft landing. … The landing point is confirmed to be 55 meters away from the target point,” said Japan’s space agency — the Japan Aerospace Exploration Agency (JAXA).

Saturday’s soft lunar landing made Japan only the fifth nation to achieve the feat, after the United States, Soviet Union, China and India.

But celebrations were muted because of a problem with the lightweight spacecraft’s solar batteries, which weren’t generating power.

JAXA decided to switch the craft off with 12 percent power remaining to allow for a possible recovery when the sun’s angle changes.

“If sunlight hits the moon from the west in the future, we believe there’s a possibility of power generation, and we’re currently preparing for restoration,” JAXA said earlier this week.

Before switching SLIM off, mission control was able to download technical and image data from the craft’s descent and the lunar surface.

On Thursday, JAXA published the first color images from the mission — showing the SLIM craft sitting intact at a slight angle on the rocky grey surface, lunar slopes rising in the distance.

The mission was aiming for a crater where the moon’s mantle, the usually deep inner layer beneath its crust, is believed to be exposed on the surface.

By analyzing the rocks there, JAXA hopes to shed light on the mystery of the moon’s possible water resources, a key to building bases there one day as possible stopovers on the way to Mars.

Two probes detached successfully from SLIM on Saturday: one with a transmitter and another designed to trundle around the lunar surface beaming images to Earth.

This shape-shifting mini-rover, slightly bigger than a tennis ball, was co-developed by the firm behind the Transformer toys and took the picture released by JAXA on Thursday.

SLIM is one of several recent lunar missions by governments and private firms, 50 years after the first human moon landing.

But technical problems are rife, and the United States faced two setbacks this month in its ambitious moon programs.

Two previous Japanese lunar missions — one public and one private — have also failed.

In 2022, the country unsuccessfully sent a lunar probe named Omotenashi as part of the United States’s Artemis 1 mission.

In April, Japanese startup ispace tried in vain to become the first private company to land on the moon, losing communication with its craft after what it described as a “hard landing.” 



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