Tianzhou 4 Explained

Tianzhou 4
Image Alt:Tianzhou 1 model
Mission Type:Tiangong space station resupply
Operator:CNSA
Cospar Id:2022-050A
Satcat:52509
Spacecraft:Tianzhou-4
Spacecraft Type:Tianzhou
Manufacturer:China Aerospace Science and Technology Corporation
Power:2
Space Station:Tiangong space station
Launch Date:9 May 2022, 17:56:37 UTC[1]
Launch Rocket:Long March 7
Launch Site:Wenchang Satellite Launch Center, LC-2
Launch Contractor:China Academy of Launch Vehicle Technology
Disposal Type:Deorbited
Decay Date:14 November 2022, 23:21 UTC
Orbit Reference:Geocentric orbit
Orbit Regime:Low Earth orbit
Orbit Inclination:41.5°
Apsis:gee
Docking:
Docking Type:Dock
Docking Port:Tianhe Aft port
Docking Date:10 May 2022, 00:54:00 UTC
Undocking Date:9 November 2022, 06:55 UTC
Programme:Tiangong program
Previous Mission:Shenzhou 13
Next Mission:Shenzhou 14
Programme2:Tianzhou program
Previous Mission2:Tianzhou 3
Next Mission2:Tianzhou 5

Tianzhou 4 was the fourth mission of the Tianzhou-class uncrewed cargo spacecraft, and the third resupply mission to Tiangong Space Station carrying 5 tons of cargos and 1 ton of propellant. It is the largest load capacity cargo spacecraft that is on active duty. It launched on 9 May 2022,[1] docking successfully with the Tiangong space station at the aft port 6 hours after launch.[2] Like previous Tianzhou missions, the spacecraft launched from the Wenchang Satellite Launch Center in Hainan, China on a Long March 7 rocket.

It is a part of the construction of the Tiangong space station, and is the third cargo resupply mission to the already launched Tianhe core module (CCM).

Spacecraft

See main article: Tianzhou (spacecraft). The Tianzhou cargo spacecraft has several notable differences with the Tiangong-1 from which it is derived. It has only three segments of solar panels (against 4 for Tiangong), but has 4 maneuvering engines (against 2 for Tiangong).[3]

Mission history

On May 7, 2022, the combination of the Tianzhou-4 cargo spacecraft and the Long March 7 Yao-5 carrier rocket are transferred vertically to the launch area.[4]

At 17:56 UTC on May 9, 2022, the Long March 7 Yaowu carrier rocket carrying the Tianzhou-4 cargo spacecraft was successfully launched at the Wenchang Cosmodrome in China.[5] [6] At about 18:06 UTC, the spacecraft and the rocket successfully separated and entered the predetermined orbit, and at 18:23 UTC, the spacecraft's solar sail board began to work.[7]

At 00:54 UTC on May 10, 2022, Tianzhou-4 adopted the autonomous rapid rendezvous and docking mode to successfully dock with the space station Tianhe and the rear port of the core module.[8]

On November 9, 2022, at 06:55 UTC, Tianzhou-4 separated from the space station in preparation for deorbiting, making way for the upcoming Tianzhou 5.[9] It reentered the Earth's atmosphere and burned up as planned on 14 November 2022.[10]

Carriers

Tianzhou-4 loaded astronaut systems, space station systems, space application fields, cargo spacecraft systems a total of more than 200 pieces (sets) of cargo, including cargo package cargo and direct installation cargo, carrying about 750 kg of supplemental propellant, the total weight of uplink materials of about 6,000 kg, for the Shenzhou 14 crew of 3 people 6 months on orbit to stay, space station assembly and construction, space science experiments and so on to provide material support.[11] One of the cargoes was a torque gyroscope weighing 170 kilograms, the heaviest of all the materials currently in transit. A small CubeSat stored onboard Tianzhou-4, Zhixing-3A, was successfully deployed on 13 November 2022.[12]

References

Notes and References

  1. Web site: China launches Tianzhou 4 cargo craft to new Tiangong space station. . 2022-05-09. 2022-05-09.
  2. Web site: Chinese unmanned cargo spacecraft docks with space station module .
  3. Web site: Baylor. Michael. Tianzhou 2. Next Spaceflight. 20 May 2021. 20 May 2021.
  4. Web site: 天舟四号货运飞船船箭组合体顺利垂直转运至发射区 将于近日择机发射. 2022-05-07. 2022-05-07. 中国载人航天.
  5. Web site: 天舟四號貨運飛船發射任務取得圓滿成功--經濟·科技--人民網. 2022-05-09. finance.people.com.cn.
  6. Web site: 運載大陸首個太空站裝備的天舟四號太空船成功發射. 2022-05-09. 經濟日報. 經濟日報. zh-TW.
  7. Web site: 天舟四号货运飞船成功发射 中国空间站建造阶段开启 . 新华网 . 2022-05-10.
  8. Web site: 天舟四号货运飞船与空间站组合体完成自主快速交会对接 . 新华网 . 2022-05-10.
  9. Web site: China's Tianzhou-4 cargo spacecraft separates from space station combination . .
  10. Web site: 天舟四号受控再入大气层任务顺利完成-新华网 . 2022-11-15 . www.news.cn.
  11. Web site: 天舟四号成功发射!中国空间站全面建造阶段揭幕之战五大看点 . 新华网 . 2022-05-10.
  12. Web site: Jones . Andrew . China's Tianzhou-4 cargo spacecraft deployed a small satellite before deorbiting . . 30 November 2022 . 30 November 2022.