Long March 2D
E708187
Long March 2D is a Chinese two-stage orbital launch vehicle primarily used to place satellites into low Earth and sun-synchronous orbits.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Long March 2D canonical | 5 |
| CZ-2D | 1 |
| Chang Zheng 2D | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7871171 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Long March 2D Context triple: [Taiyuan Satellite Launch Center, hasLaunchPadFor, Long March 2D]
-
A.
Long March 2C
Long March 2C is a Chinese two-stage orbital launch vehicle used primarily to place satellites into low Earth orbit.
-
B.
Long March 2F
Long March 2F is a Chinese human-rated orbital launch vehicle primarily used to send crewed Shenzhou spacecraft into space as part of China’s human spaceflight program.
-
C.
Long March 5
Long March 5 is a heavy-lift Chinese orbital launch vehicle developed by the China National Space Administration for deploying large payloads to Earth orbit and deep-space missions.
-
D.
Long March 5B
Long March 5B is a heavy-lift Chinese orbital launch vehicle primarily used to carry large modules and payloads for the country’s space station program.
-
E.
Tianzhou cargo spacecraft
The Tianzhou cargo spacecraft is a Chinese automated freighter designed to deliver supplies, equipment, and fuel to support long-term operations of China’s Tiangong space station.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Long March 2D Target entity description: Long March 2D is a Chinese two-stage orbital launch vehicle primarily used to place satellites into low Earth and sun-synchronous orbits.
-
A.
Long March 2C
Long March 2C is a Chinese two-stage orbital launch vehicle used primarily to place satellites into low Earth orbit.
-
B.
Long March 2F
Long March 2F is a Chinese human-rated orbital launch vehicle primarily used to send crewed Shenzhou spacecraft into space as part of China’s human spaceflight program.
-
C.
Long March 5
Long March 5 is a heavy-lift Chinese orbital launch vehicle developed by the China National Space Administration for deploying large payloads to Earth orbit and deep-space missions.
-
D.
Long March 5B
Long March 5B is a heavy-lift Chinese orbital launch vehicle primarily used to carry large modules and payloads for the country’s space station program.
-
E.
Tianzhou cargo spacecraft
The Tianzhou cargo spacecraft is a Chinese automated freighter designed to deliver supplies, equipment, and fuel to support long-term operations of China’s Tiangong space station.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
expendable launch system
ⓘ
orbital launch vehicle ⓘ |
| alsoKnownAs |
CZ-2D
ⓘ
linked to:
Long March 2D
Chang Zheng 2D ⓘ
linked to:
Long March 2D
|
| countryOfOrigin | China ⓘ |
| designPurpose |
reliable access to low Earth orbit
ⓘ
reliable access to sun-synchronous orbit ⓘ |
| developedBy | China Aerospace Science and Technology Corporation ⓘ |
| enteredService | 1990s ⓘ |
| familyRole | variant optimized for sun-synchronous missions ⓘ |
| familyVariantOf | Long March 2 ⓘ |
| firstStageEngineType | YF-21C ⓘ |
| guidanceSystem | inertial guidance ⓘ |
| launchCapability |
low Earth orbit
ⓘ
sun-synchronous orbit ⓘ |
| launchEnvironment | land-based launch pad ⓘ |
| launchMarket |
domestic Chinese payloads
ⓘ
international commercial payloads ⓘ |
| launchProfile | vertical takeoff ⓘ |
| launchSitesUsed |
Jiuquan Satellite Launch Center
ⓘ
Taiyuan Satellite Launch Center ⓘ Xichang Satellite Launch Center ⓘ |
| launchVehicleType | medium-lift launch vehicle ⓘ |
| manufacturer | Shanghai Academy of Spaceflight Technology ⓘ |
| missionProfile |
inclined low Earth orbit launches
ⓘ
polar orbit launches ⓘ |
| operator |
China Aerospace Science and Technology Corporation
ⓘ
China National Space Administration ⓘ |
| partOfFamily |
Long March rocket family
ⓘ
linked to:
Long March launch vehicles
|
| primaryUse |
launching satellites to low Earth orbit
ⓘ
launching satellites to sun-synchronous orbit ⓘ |
| propellantCombination |
nitrogen tetroxide
ⓘ
unsymmetrical dimethylhydrazine ⓘ |
| propellantType | hypergolic propellant ⓘ |
| reusability | non-reusable ⓘ |
| rocketConfiguration | two-stage ⓘ |
| secondStageEngineType | YF-24C ⓘ |
| stages | 2 ⓘ |
| status | operational ⓘ |
| technologyBase | Long March 2 core technology ⓘ |
| usedBy |
People's Republic of China
ⓘ
linked to:
China
|
| usedFor |
Earth observation satellites
ⓘ
linked to:
Earth observation
remote sensing satellites ⓘ scientific satellites ⓘ technology demonstration satellites ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Long March 2D Description of subject: Long March 2D is a Chinese two-stage orbital launch vehicle primarily used to place satellites into low Earth and sun-synchronous orbits.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Long March 2D
linked to: Long March 2D