H-IIB 304
H-II family
· built by Mitsubishi Heavy Industries
· maiden flight 2009-09-10
Profile data last updated: 2026-08-15T20:08:04.839063+00:00 | 7531-09-01
H-IIB (H2B) is an expendable launch system used to launch H-II Transfer Vehicles (HTV, or Kounotori) towards the International Space Station. H-IIB rockets are liquid-fuelled with solid-fuel strap-on boosters and are launched from the Tanegashima Space Center in Japan. Mitsubishi and JAXA have been primarily responsible for design, manufacture, and operation of H-IIB.
Specifications
56.6 mLength
5.2 mDiameter
551 tLaunch mass
9000 kNLiftoff thrust
Payload Capacity
16500 kgTo LEO
8000 kgTo GTO
Lifetime Launch Record
As reported by Launch Library 2 across this rocket's entire history, not just the launches tracked on this site.
9Total launches
9Successful
0Failed
0Upcoming
Launches Tracked on This Site
9In our archive
100.0%Success rate
Sep 10, 2009 17:01 UTCEarliest tracked
May 20, 2020 17:31 UTCMost recent
| Mission | Date | Status |
|---|---|---|
| H-IIB 304 | Kounotori 9 (HTV-9) | May 20, 2020 17:31 UTC | Success |
| H-IIB 304 | Kounotori 8 (HTV-8) | Sep 24, 2019 16:05 UTC | Success |
| H-IIB 304 | Kounotori 7 (HTV-7) | Sep 22, 2018 17:52 UTC | Success |
| H-IIB 304 | Kounotori 6 (HTV-6) | Dec 09, 2016 13:26 UTC | Success |
| H-IIB 304 | Kounotori 5 (HTV-5) | Aug 19, 2015 11:50 UTC | Success |
| H-IIB 304 | Kounotori 4 (HTV-4) | Aug 03, 2013 19:48 UTC | Success |
| H-IIB 304 | Kounotori 3 (HTV-3) | Jul 21, 2012 02:06 UTC | Success |
| H-IIB 304 | Kounotori 2 (HTV-2) | Jan 22, 2011 05:37 UTC | Success |
| H-IIB 304 | Kounotori 1 (HTV-1) | Sep 10, 2009 17:01 UTC | Success |