MMX is a Japanese scientific mission to land on Phobos, one of the two moons of Mars, to collect samples before bringing them back to Earth.
The mission includes a small French/German rover to explore the surface of Phobos. Lifts off from Yoshinobu Launch Complex LP-2, Tanegashima Space Center, Japan to Mars Orbit.
The launch is recorded as "H3-24 | Martian Moon eXplorer (MMX)", status "Go for Launch" - "Current T-0 confirmed by official or reliable sources" - with NET 2026-10-19T19:41:03Z to second precision and an instantaneous window, window start and end identical[1]
An update of 2026-08-19 says "NET October 20" while the T-0 is 19 October: the same instant, since 19:41 UTC on 19 October is 04:41 on 20 October in the pad's Asia/Tokyo timezone. The following day, 2026-08-20, Cosmic_Penguin logged "GO for launch" from a jaxa.jp press release[1]
Mission "Martian Moon eXplorer (MMX)", type "Planetary Science", orbit "Mars Orbit": "MMX is a Japanese scientific mission to land on Phobos, one of the two moons of Mars, to collect samples before bringing them back to Earth. The mission includes a small French/German rover to explore the surface of Phobos"[1]
The launch service provider is Mitsubishi Heavy Industries, a commercial Japanese agency founded in 1884 with 58 launches, 56 successful, 2 failed, 13 pending and 2 consecutive successes[1]
The rocket is the H3 in its "24" configuration - two LE-9 main-stage engines and four SRB-3 solid boosters - expendable, 2 stages, 63.0 m long, 5.27 m in diameter, 7900.0 kg to GTO, takeoff thrust 12142.0 and a launch cost of 50000000; this configuration first flew on 2025-10-26 and has 1 launch, 1 successful, against the H3 family's 9 launches, 7 successful, 2 failed and 8 pending since its 2023-03-07 debut[1]
The flight timeline runs booster separations at T+1m56s and 1m58s, fairing separation 3m17s, MECO 4m52s, stage 2 separation 4m59s, first ignition 5m12s, first cutoff 10m40s, second ignition 1h03m57s, second cutoff 1h10m21s and payload separation at 1h11m12s[1]
It flies from Yoshinobu Launch Complex LP-2 at Tanegashima Space Center, "the largest rocket-launch complex in Japan ... located on the southeastern tip of Tanegashima, an island located south of Kyushu", established in 1969 with NASDA and now run by JAXA; the pad has 18 launches to date and the site 99[1]
The mission had slipped once before: an update of 2023-12-06 recorded it "Delayed to 2026 launch window due to H3 launch vehicle unavailability", followed by "NET October" on 2026-01-07[1]
Counting: orbital launch attempt 7413 overall and 240 of the year; the record was last updated 2026-08-20T21:04:48Z, with no webcast, video or info URLs and no mission patches[1]
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
ll.thespacedevs.com· Posted Sep 20, 2026· Starts Oct 19, 2026 ✓· 100% of score
Launch Library 2 lists this as the no-earlier-than launch time; launches slip.
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Space Launch Complex 4E, Vandenberg SFB, CA, USASpaceX
ESTIMATED10 days late60% CONFIDENCEin 17 daysSpaceflight Now's[2] schedule (checked 2026-09-23): "Falcon 9 Starlink 15-25 - 'TBD' launch time on October 10 | SLC-4E, Vandenberg"; rocketlaunch.org gives October 10, 4:00 PM UTC. No firm time yet.
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Kalshi
Polymarket
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Space Launch Complex 4E, Vandenberg SFB, CA, USASpaceX
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SCHEDULED75% CONFIDENCEin 99 daysAn annual count is settled when the year ends: Kalshi[1] expires the 2026 event on December 31, 2026 and Polymarket[2] closes its version at 04:59 UTC on January 1, 2027, so the date follows the market’s terms rather than an estimate.
Kalshi
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