JAXA's MMX: launched to Phobos on an H3-24L — a sample-return mission
From the Space digest for 2026-10-19
What happened: JAXA launched its Martian Moons eXploration (MMX) probe on Monday, October 19, 2026, at 3:41 PM EDT (19:41 UTC) from the Tanegashima Space Center atop an H3-24L rocket (NSF X relay; corroborated by a NASA Mars relay putting "Go MMX!" liftoff at 3:41 PM EDT on the same day). The spacecraft is bound for Mars's moon Phobos. A Jeff Foust relay of SpaceNews (~5:37 PM ET October 19) confirms the frame: Japan has launched a sample-return mission to the Martian moon Phobos. Within the same day, the mission moved from "set for launch" to an actual liftoff.
What's genuinely new: a development of the mission's debut earlier in this window (Section 5 as first drafted) — the record had the probe poised for launch on October 19, and the date resolved successfully, now with the sample-return purpose named. The record's only other Mars-side thread remains the contract dispute — Blue Origin's $700M Mars Telecommunications Network award against Rocket Lab's GAO protest — not a science mission.
Watch: confirmation of the H3 vehicle's performance, MMX's departure trajectory and its sample-cache plan at Phobos.
Links: NASASpaceflight — MMX set for launch · NSF X — LAUNCH! H3-24L launches MMX · NASA Mars relay — 3:41 PM EDT liftoff · Foust RT of SpaceNews — sample-return mission to Phobos