Author Topic: FAILURE: H3-22S F8 : QZS-5 : Tanegashima : December 22, 2025 (01:51 UTC) (Read 32184 times)

Galactic Penguin SST · « **on:** 10/08/2025 05:31 am »

https://global.jaxa.jp/press/2025/10/20251008-1_e.html

Launch Schedule of the H3 Launch Vehicle No.8 (H3 F8) which carries aboard MICHIBIKI No.5
October 8, 2025 (JST)

Japan Aerospace Exploration Agency
Mitsubishi Heavy Industries, Ltd.

The launch schedule of MICHIBIKI No.5, Quasi-Zenith Satellite System (QZS-5) aboard the 8th H3 Launch Vehicle (H3 F8: Flight No.

as follows.

Launch date   : December 7, 2025
Launch Window   : 11:30 (JST) through 12:30 (JST)*
The time is the 24-hour clock
Reserved Launch Period   : December 8, 2025 through January 31, 2026
Launch site   : Yoshinobu Launch Complex at the JAXA Tanegashima Space Center
* Launch time during the reserved launch period will vary.

Galactic Penguin SST · « **Reply #1 on:** 11/12/2025 01:33 am »

Launch mission plan:

StraumliBlight · « **Reply #2 on:** 11/25/2025 10:39 pm »

QZS-5: Overview of Michibiki No. 5 [Nov 25]

Quote

Launch Mass: ~4.8 tons
Satellite Bus: DS2000

Galactic Penguin SST · « **Reply #3 on:** 12/03/2025 12:30 pm »

Launch has been delayed:

Launch Postponement of MICHIBIKI No. 5, Quasi-Zenith Satellite System (QZS-5) aboard the 8th H3 Launch Vehicle (H3 F8)
December 3, 2025 (JST)

Japan Aerospace Exploration Agency

The launch of MICHIBIKI No. 5, Quasi-Zenith Satellite System (QZS-5) aboard the 8th H3 Launch Vehicle (H3 F8) which was scheduled on December 7, 2025(JST), has been postponed due to the occurrence of a need to check onboard equipment (IMU*1) on the 2nd stage.

The new launch date will be announced once confirmed.

*1
IMU：Inertial Measurement Unit

GewoonLukas_ · « **Reply #4 on:** 12/13/2025 07:10 am »

Quote

Launch Schedule of MICHIBIKI No. 5, Quasi-Zenith Satellite System (QZS-5) aboard the 8th H3 Launch Vehicle (H3 F8) [Rescheduled]
December 13, 2025 (JST)

Japan Aerospace Exploration Agency (JAXA) had previously postponed the launch of the Quasi-Zenith Satellite System "Michibiki No. 5" aboard the H3 Launch Vehicle No. 8 due to the occurrence of a need to check onboard equipment (IMU*1) on the 2nd stage. However, following an investigation, the cause has been identified and corrective measures have been completed.
Based on the above, the new launch date for the H3 Launch Vehicle No. 8 has been rescheduled as follows:

Launch date   : December 17, 2025
Launch Window   : 11:00 (JST) through 12:00 (JST) *2
The time is the 24-hour clock
Reserved Launch Period   : December 18, 2025 through January 31, 2026
Launch site   : Yoshinobu Launch Complex at the JAXA Tanegashima Space Center

[...]

catdlr · « **Reply #5 on:** 12/13/2025 07:50 pm »

https://twitter.com/SpaceIntel101/status/1999870373253566959

Quote

Space Intelligence
@SpaceIntel101
·

The H3 rocket fairing with the Michibiki No. 5 satellite stowed within was being transported to the Large Rocket Assembly Building🚀
This fairing is the short configuration, about 10 meters tall👇

Galactic Penguin SST · « **Reply #6 on:** 12/15/2025 04:07 am »

Launch window has been refined to 02:10:00 - 02:24:30 UTC.

Galactic Penguin SST · « **Reply #7 on:** 12/15/2025 07:18 am »

Live stream:

Galactic Penguin SST · « **Reply #8 on:** 12/17/2025 12:14 am »

Per on-site reports, there's a 1 minute slip to the T-0.
Now 02:11:00 UTC.

jcm · « **Reply #9 on:** 12/17/2025 01:12 am »

Abort at ignition, rocket still on pad.

lightleviathan · « **Reply #10 on:** 12/17/2025 01:16 am »

Scrub due to GSE

catdlr · « **Reply #11 on:** 12/17/2025 01:46 am »

Replay of the Scrub.

zubenelgenubi · « **Reply #12 on:** 12/17/2025 03:08 am »

Scrub screencaps from JAXA webcast. I saw no ignition.

Galactic Penguin SST · « **Reply #13 on:** 12/17/2025 04:25 am »

Launch was halted at T-16.8 seconds due to abnormal (insufficient?) pressure reading on a downstream valve for the pad sound suppression water system.

https://twitter.com/nvslive/status/2001156726335414306

https://twitter.com/nvslive/status/2001157034625081782

https://twitter.com/nvslive/status/2001158827643953222

catdlr · « **Reply #14 on:** 12/17/2025 04:45 am »

Here is the translation of those posts (doesn't change what was reported above).

catdlr · « **Reply #15 on:** 12/17/2025 04:47 am »

For those who know the language, here is the post scrub feed

Galactic Penguin SST · « **Reply #16 on:** 12/19/2025 04:02 pm »

https://global.jaxa.jp/press/2025/12/202519-1_e.html

Launch Schedule of MICHIBIKI No. 5, Quasi-Zenith Satellite System (QZS-5) aboard the 8th H3 Launch Vehicle (H3 F8) [Rescheduled]

December 19, 2025 (JST)

Japan Aerospace Exploration Agency

Japan Aerospace Exploration Agency (JAXA) scheduled the launch of MICHIBIKI No. 5, Quasi-Zenith Satellite System (QZS-5) aboard the 8th H3 Launch Vehicle (H3 F8) on December 17, 2025. However, it has been canceled because an uncertain incident was found in the cooling water injection equipment.

As a result of the investigation, the cause was identified in the frame deflector cooling system of the cooling water injection equipment, and a verification test confirmed that water can be injected at the proper flow rate.

Based on the above, the new launch date for the 8th H3 Launch Vehicle has been rescheduled as follows:

Launch date    : December 22, 2025
Launch Window    : 10:30 through 11:30 (JST)*
The time is the 24-hour clock
Reserved Launch Period    : December 23, 2025 through January 31, 2026
Launch site    : Yoshinobu Launch Complex at the JAXA Tanegashima Space Center

* Launch time during the reserved launch period will vary.

catdlr · « **Reply #17 on:** 12/19/2025 06:21 pm »

Pre-Launch Presser

H3 Rocket No. 8 Pre-launch Briefing

Scheduled for 2 AM ET

Galactic Penguin SST · « **Reply #18 on:** 12/20/2025 06:10 am »

Launch window has been refined to 01:51:30 - 02:04:33 UTC on December 22.

Galactic Penguin SST · « **Reply #19 on:** 12/20/2025 06:24 am »