{"id":2963,"date":"2026-10-21T00:49:07","date_gmt":"2026-10-20T15:49:07","guid":{"rendered":"https:\/\/onepress.co.kr\/?post_type=briefing&p=2963"},"modified":"2026-10-21T00:50:50","modified_gmt":"2026-10-20T15:50:50","slug":"2026-10-21-mmx-phobos-launch-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-10-21-mmx-phobos-launch-en\/","title":{"rendered":"MMX launches toward Phobos, beginning a sample-return attempt"},"content":{"rendered":"

2026-10-21 00:49:07 KST<\/strong><\/p>\n

Japan\u2019s MMX spacecraft launched from Tanegashima on an H3 rocket at 4:41 a.m. on October 20 in Japan and Korea.<\/p>\n

The successful step is departure; landing on Phobos, collecting material and returning it to Earth in 2031 remain future objectives.<\/p>\n

Material from a moon, rather than Mars itself<\/h2>\n

MMX will investigate how Mars\u2019s two small moons, Phobos and Deimos, formed. Its central sample-return objective concerns Phobos. Laboratory analysis could help distinguish captured asteroids from moons formed out of debris after a large impact on Mars. Deimos will also be observed, but the plan should not be described as collecting samples from both moons.<\/p>\n

Why reports give two calendar dates<\/h2>\n

DLR dates liftoff to October 19 at 9:41 p.m. Central European Summer Time. That equals 19:41 UTC on October 19 and 4:41 a.m. on October 20 in Japan and Korea. Space.com\u2019s analysis of the launch webcast describes stage separations and spacecraft release roughly 71 minutes after liftoff. The different calendar dates refer to the same launch.<\/p>\n

\"MMX
AI-generated explanatory illustration, not an actual photograph or exact reproduction of sites, artworks, observations, vehicles or equipment. This is a future-mission concept, not evidence that a Phobos landing has already occurred.<\/figcaption><\/figure>\n

A small rover will investigate the surface<\/h2>\n

Idefix, developed by Germany\u2019s DLR and France\u2019s CNES, is scheduled to reach the surface around late 2028 or early 2029. Its approximately 100-day exploration should supply surface information to help prepare the mothercraft\u2019s landing and sampling. Righting itself after landing and moving in extremely weak gravity create challenges unlike driving a vehicle on Earth.<\/p>\n

What still has to succeed?<\/h2>\n

Cruise, arrival in the Mars system, rover deployment, mothercraft landing, sample storage and return all remain ahead. The year 2031 is the planned return year, not the arrival date of material already secured. The launch begins an opportunity to test moon-origin hypotheses using physical material. Actual laboratory results and conclusions depend on the later mission stages succeeding.<\/p>\n

Primary sources and independent checks<\/h2>\n

Primary: mission participant\u2019s launch result and rover schedule. Late 2028\/early 2029, 100 days and 2031 remain planned milestones.: DLR \u00b7 MMX launch and Idefix<\/a><\/p>\n

Independent check: analyzes stages and spacecraft release seen in the launch webcast; it is not just a reproduced release.: Space.com \u00b7 launch webcast analysis<\/a><\/p>\n

Additional primary: a participant\u2019s prelaunch mission description establishes the sampling target, remote observations and origin questions, not launch success.: ESA \u00b7 MMX mission objectives<\/a><\/p>\n

Read in other languages<\/h2>\n

\ud55c\uad6d\uc5b4<\/a> \u00b7 English<\/a> \u00b7 Espa\u00f1ol<\/a> \u00b7 \u65e5\u672c\u8a9e<\/a> \u00b7 Ti\u1ebfng Vi\u1ec7t<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

The launch was early October 20 in Japan and Korea. A return in 2031 remains a mission goal, not an accomplished collection.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2963","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/2963","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing"}],"about":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/types\/briefing"}],"wp:attachment":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=2963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}