# Casc Long March 4c
*launch services*

## Specifications
- **merge suggestions**: [{"slug":"casc-long-march-2d","name":"Casc Long March 2d","score":0.8888888888888888,"matchedOn":"slug","matchedValue":"casc-long-march-2d"}]
- **entity type**: launch_service
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **attributes**: {"merge_suggestions":"[{\"slug\":\"casc-long-march-2d\",\"name\":\"Casc Long March 2d\",\"score\":0.8888888888888888,\"matchedOn\":\"slug\",\"matchedValue\":\"casc-long-march-2d\"}]"}

## Editorial
Long March 4C (CZ-4C / LM-4C) is an active three-stage Chinese orbital launch vehicle used heavily for Sun-synchronous Earth-observation missions.[^cnsa-cz4c-spec][^sast-lm4bc][^cnsa-daqi2-2026] It remained active as of 2026-06-16: the vehicle first flew on 2006-04-27, and a Long March 4C launched the Daqi-2 greenhouse-gas satellite on 2026-04-17.[^sast-lm4bc][^cnsa-daqi2-2026][^spacechina-daqi2-2026] Payload capacity is 3,200 kg to Sun-synchronous orbit for both a 700 km and a 600 km reference case.[^cnsa-cz4c-spec][^sast-lm4bc] The vehicle uses N2O4/UDMH propulsion across three stages, with 250 t liftoff mass, 48 m length, 3.35 m first- and second-stage diameter, 2.9 m third-stage diameter, and 2.9 m, 3.35 m, or 3.8 m fairing options.[^cnsa-cz4c-spec]

## Sources
- [cnsa-cz4c-spec] | Long March 4C (CZ-4C), China National Space Administration | https://www.cnsa.gov.cn/n6758824/n6759008/n6759011/c6794063/content.html | tier=agency-doc | accessed=2026-06-16
- [sast-lm4bc] | LM-4B/4C, Shanghai Academy of Spaceflight Technology | https://www.sast.net/product/12.html | tier=operator-engineering | accessed=2026-06-16
- [cnsa-daqi2-2026] | High-precision greenhouse gas comprehensive detection satellite successfully launched, CNSA | https://www.cnsa.gov.cn/n6758823/n6758838/c10739812/content.html | tier=agency-doc | accessed=2026-06-16 | published=2026-04-17
- [spacechina-daqi2-2026] | Long March 4C successfully launches high-precision greenhouse gas comprehensive detection satellite, CASC | https://www.spacechina.com/n25/n2014789/n2014804/c4590001/content.html | tier=operator-press | accessed=2026-06-16 | published=2026-04-17

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Source: https://eo-atlas.org/launch_services/casc-long-march-4c
Maintainer: SpectraWorks B.V. (CC-BY 4.0)