H-1 | Yuri 3B
Operated by Mitsubishi Heavy Industries, the Communications mission H-1 | Yuri 3B delivered its payload into Direct-GEO.
- Launch time
- Status
- SUCCESS
- Operator
- Mitsubishi Heavy Industries
- Mission type
- Communications
- Rocket
- H-1
- Launch site
- Tanegashima Space Center, Japan
- Launch pad
- Osaki Launch Complex
- Payload
- —
- Target orbit
- Direct-GEO

Mission timeline
- 1991-08-25T08:40:00.000ZLiftoff confirmed — H-1 is airborne.
- Max Q — H-1 endures peak structural stress during ascent.
- First-stage main engine cutoff (MECO) confirmed.
- The spent first stage separates from the upper stage.
- Upper stage ignites, continuing the journey toward orbit.
- The mission reaches Direct-GEO, successfully entering orbit.
- The mission concludes successfully.