Kounotori 4
HTV-4 being grappled by the SSRMS on 9 August 2013
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| Mission type | ISS resupply |
|---|---|
| Operator | JAXA |
| COSPAR ID | 2013-040A |
| SATCAT no. | 39221 |
| Mission duration | 35 days |
| Spacecraft properties | |
| Spacecraft type | HTV |
| Start of mission | |
| Launch date | 3 August 2013, 19:48:46 UTC |
| Rocket | H-IIB |
| Launch site | Tanegashima Y2 |
| Contractor | Mitsubishi |
| End of mission | |
| Disposal | Deorbited |
| Decay date | 7 September 2013, 06:37 UTC |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee | 281 kilometres (175 mi) |
| Apogee | 302 kilometres (188 mi) |
| Inclination | 51.6 degrees |
| Period | 90.34 minutes |
| Epoch | 5 August 2013 |
| Berthing at ISS | |
| Berthing port | Harmony nadir |
| RMS capture | 9 August 2013, 11:22 UTC |
| Berthing date | 9 August 2013, 15:28 UTC |
| Unberthing date | 4 September 2013, 12:07 UTC |
| RMS release | 4 September 2013, 16:20 UTC |
| Time berthed | 25 days, 20 hours, 29 minutes |
| Cargo | |
| Mass | 5,400 kilograms (11,900 lb) |
| Pressurised | 3,900 kilograms (8,600 lb) |
| Unpressurised | 1,500 kilograms (3,300 lb) |
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Kounotori 4, also known as HTV-4, was the fourth flight of the H-II Transfer Vehicle, an unmanned cargo spacecraft launched in August 2013 to resupply the International Space Station. It launched from Tanegashima Space Center aboard H-IIB rocket on August 3, 2013 and connected to ISS by August 9, 2013; it carried 5.4 tons of cargo. Kounotori 4 undocked on September 4, 2013 and was destroyed by reentry on 7 September 2013.
Major changes of Kounotori 4 from previous HTV are:
Kounotori 4 carries about 5.4 tonnes of cargo, consisting of 3.9 t in pressurized compartment and 1.5 t in unpressurized compartment.
Pressurized cargo include: CANA (Cabin network system for Kibo), Stirling-Cycle Refrigerator (FROST), ISS Cryogenic Experiment Storage Box (ICE Box), i-Ball reentry data recorder, four CubeSats (PicoDragon, ArduSat-1, ArduSat-X, TechEdSat-3), and Kirobo (robot companion for Koichi Wakata).
Unpressurized cargo are: MBSU (Main Bus Switching Units) and UTA (Utility Transfer Assembly) which are ISS system spare parts, and a NASA experiment module STP-H4 (Space Test Program - Houston 4).
Kounotori 4 was successfully launched atop a H-IIB carrier rocket flying from pad 2 of the Yoshinobu Launch Complex at Tanegashima at 19:48:46 UTC on 3 August 2013.
After 5.5 days of orbital manoeuvres, it arrived to Approach Initiation Point (5 km behind ISS) at 05:31, 9 August 2013 UTC, and started the final approach sequence at 08:05. The ISS's robotic arm SSRMS grappled Kounotori 4 at 11:22, and fastened to ISS's CBM on 16:32. All berthing operations were completed at 18:38.
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