Long March 4A

Rendering of Long March 4A

Function| Carrier rocket
Manufacturer| CALT
Country of origin| China
Size
Height| 41.9 metres (137 ft)[1]
Diameter| 3.35 metres (11.0 ft)[1]
Mass| 249,000 kilograms (549,000 lb)[1]
Stages| 3
Capacity
Payload to LEO| 4,000 kilograms (8,800 lb)[2]
Payload to SSO| 1,500 kilograms (3,300 lb)[2]
Associated rockets
Family| Long March
Derivatives| Long March 4B
Launch history
Status| Retired
Launch sites| LA-7, TSLC
Total launches| 2
Successes| 2
First flight| 6 September 1988
Last flight| 3 September 1990

The Long March 4A (Chinese: 长征四号甲火箭), also known as the Changzheng 4A, CZ-4A and LM-4A, sometimes misidentified as the Long March 4 due to the lack of any such designated rocket, was a Chinese orbital carrier rocket. It was launched from Launch Area 7 at the Taiyuan Satellite Launch Center. It was a three-stage rocket, used for two launches in 1988 and 1990. On its maiden flight, on 6 September 1988, it placed the FY-1A weather satellite into orbit. On its second, and final, flight it launched another weather satellite, FY-1B.

A few days after the launch of FY-18, the third-stage of the CZ-4A launch vehicle exploded in the 895 km orbit, creating more than 80 pieces of space debris. This incident led to a redesign of the rocket to include a residual propellant venting system. A venting system was not included in the 4a because of the concern that it would damage the satellite.

It was replaced by a derivative, the Long March 4B, which first flew in 1999. The Long March 4B offers a more powerful third stage, and a larger payload fairing.

## List of launches

Main page: Engineering:List of Long March launches
Flight No.  | Date (UTC)  | Launch site  | Payload  | Orbit  | Result

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1  | September 6, 1988
20:30  | LA-7, TSLC  | Fengyun 1A  | SSO  | Success
2  | September 3, 1990
00:53  | LA-7, TSLC  | Fengyun 1B  | SSO  | Success

## References

1. ↑ 1.0 1.1 1.2 Mark Wade. "CZ-4A". Encyclopedia Astronautica. http://www.astronautix.com/lvs/cz4a.htm.
2. ↑ 2.0 2.1 Gunter Krebs. "CZ-4 (Chang Zheng-4)". Gunter's Space Page. http://space.skyrocket.de/doc_lau_det/cz-4.htm.

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* Symbol † indicates projects terminated before a successful orbital launch

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Chinese space program

* China National Space Administration (CNSA)

| Spaceports and landing sites|

* Jiuquan
* Taiyuan
* Wenchang
* Xichang
* Siziwang Banner (landing site)

|

Launch vehicles|

* Long March 2
* Long March 3
* Long March 4
* Long March 5
* Long March 6
* Long March 7
* Long March 11
* Kuaizhou
* Kaituozhe

Exploration programs|

* Shuguang (cancelled)
* Shenzhou (human spaceflight)
* Chang'e (lunar exploration)
* Tiangong (space station)

Projects and missions

Science|

| Planetary science|

* Chang'e 1 (2007–09)
* Chang'e 2 (2010–present)
* Yinghuo 1† (2011)
* Chang'e 3 (2013–present)
* Chang'e 5-T1 (2014–present)
* Yutu (2013–2016)
* Chang'e 4 (2018-present)
* Yutu-2 (2018-present)
* Chang'e 5 (2020)
* Mars Global Remote Sensing Orbiter and Small Rover (2020)
* ZhengHe (2024)

|

Astronomy and
cosmology

* DAMPE (2015–present)
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* GECAM (2020)
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* ASO-S (2022)
* Xuntian (2022)
* Space Solar Telescope

Earth observation|

* CSES (2018–present)
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* HY
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Human spaceflight|

| Crewed expeditions|

* List of Chinese astronauts
* Shenzhou 5
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Space laboratories and cargos|

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Navigation|

* BeiDou Navigation Satellite System (BDS)

Telecommunications|

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Technology
demonstrators

* FSW Program (1969–2006)
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* Future missions marked in italics, failed missions marked with † sign

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Long March (rocket family)

Rockets|

* Feng Bao 1
* Long March 1
* 1D
* Long March 2
* 2A
* 2C
* 2D
* 2E
* 2F
* Long March 3
* 3A
* 3B
* 3B/E
* 3C
* Long March 4
* 4A
* 4B
* 4C
* Long March 5
* 5B
* Long March 6
* Long March 7
* 7A
* Long March 8
* Long March 9
* Long March 11

Launch sites|

* Jiuquan
* Taiyuan
* Wenchang
* Xichang

Manufacturers|

* China Academy of Launch Vehicle Technology
* Shanghai Academy of Spaceflight Technology

Designers|

Wang Xiji

* List of Long March launches

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