LE-5B
E410445
The LE-5B is a Japanese liquid-fueled cryogenic rocket engine developed by JAXA and Mitsubishi Heavy Industries for use on the upper stages of modern H-II series launch vehicles.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T4065567 — 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: LE-5B Context triple: [H-IIA launch vehicle, upperStageEngine, LE-5B]
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A.
LC-36B
LC-36B is one of the two historical Atlas rocket launch pads at Cape Canaveral’s Launch Complex 36, used extensively during the early U.S. space and planetary exploration programs.
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B.
Leeb
Leeb is a German surname most notably associated with Wilhelm Ritter von Leeb, a field marshal in the Wehrmacht during World War II.
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C.
LC-36A
LC-36A is one of the launch pads at Cape Canaveral’s Launch Complex 36, historically used for Atlas rocket launches.
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D.
LC-36
LC-36 is a historic launch complex at Cape Canaveral in Florida that has been used for numerous Atlas rocket launches and planetary missions.
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E.
LEBL
LEBL is the ICAO airport code for Barcelona–El Prat Airport, the main international gateway serving Barcelona, Spain.
- 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: LE-5B Target entity description: The LE-5B is a Japanese liquid-fueled cryogenic rocket engine developed by JAXA and Mitsubishi Heavy Industries for use on the upper stages of modern H-II series launch vehicles.
-
A.
LC-36B
LC-36B is one of the two historical Atlas rocket launch pads at Cape Canaveral’s Launch Complex 36, used extensively during the early U.S. space and planetary exploration programs.
-
B.
Leeb
Leeb is a German surname most notably associated with Wilhelm Ritter von Leeb, a field marshal in the Wehrmacht during World War II.
-
C.
LC-36A
LC-36A is one of the launch pads at Cape Canaveral’s Launch Complex 36, historically used for Atlas rocket launches.
-
D.
LC-36
LC-36 is a historic launch complex at Cape Canaveral in Florida that has been used for numerous Atlas rocket launches and planetary missions.
-
E.
LEBL
LEBL is the ICAO airport code for Barcelona–El Prat Airport, the main international gateway serving Barcelona, Spain.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
cryogenic rocket engine
ⓘ
liquid-fueled rocket engine ⓘ rocket engine ⓘ |
| agency |
Japan Aerospace Exploration Agency
ⓘ
surface form:
JAXA
|
| application |
geostationary transfer orbit missions
ⓘ
orbital insertion ⓘ |
| chamberPressure | 3.8 MPa ⓘ |
| combustionChamberCount | 1 ⓘ |
| coolingMethod | regenerative cooling ⓘ |
| countryOfOrigin | Japan ⓘ |
| designGoal |
higher performance
ⓘ
improved reliability over LE-5A ⓘ simplified turbomachinery ⓘ |
| developer |
Japan Aerospace Exploration Agency
ⓘ
surface form:
JAXA
Japan Aerospace Exploration Agency ⓘ |
| diameter | 1.5 m ⓘ |
| dryMass | 255 kg ⓘ |
| engineCycle | expander bleed cycle ⓘ |
| firstFlight | 1999 ⓘ |
| gimbalRange | ±6 degrees ⓘ |
| length | 3.4 m ⓘ |
| manufacturer | Mitsubishi Heavy Industries ⓘ |
| nozzleExpansionRatio | 160 ⓘ |
| operator |
Japan Aerospace Exploration Agency
ⓘ
surface form:
JAXA
|
| oxidizer | liquid oxygen ⓘ |
| predecessor | LE-5A ⓘ |
| propellantFeedSystem | turbopump-fed ⓘ |
| propellantType |
liquid hydrogen
ⓘ
liquid oxygen ⓘ |
| propulsionType | chemical rocket ⓘ |
| restartCapability | multiple restart ⓘ |
| specificImpulseVacuum | 448 s ⓘ |
| status | operational ⓘ |
| successor |
LE-5B
self-linksurface differs
ⓘ
surface form:
LE-5B-2
|
| thrustVacuum | 137.2 kN ⓘ |
| thrustVectorControl | gimbaled nozzle ⓘ |
| usedFor |
launching cargo to ISS via HTV
ⓘ
launching satellites ⓘ upper stage propulsion ⓘ |
| usedIn |
H-IIA launch vehicle
ⓘ
surface form:
H-2A launch vehicle
H-2B launch vehicle ⓘ H-IIA 202 configuration ⓘ H-IIA launch vehicle ⓘ
surface form:
H-IIA 204 configuration
H-IIA upper stage ⓘ H-IIB launch vehicle ⓘ
surface form:
H-IIB core stage upper module
H-IIB launch vehicle ⓘ
surface form:
H-IIB upper stage
|
| usedOnVehicleFamily |
H-II rocket family
ⓘ
surface form:
H-II series
|
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: LE-5B Description of subject: The LE-5B is a Japanese liquid-fueled cryogenic rocket engine developed by JAXA and Mitsubishi Heavy Industries for use on the upper stages of modern H-II series launch vehicles.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
LE-5B-3
this entity surface form:
LE-5B-3
this entity surface form:
LE-5B-3