Saturn V S-II second stage
E179083
The Saturn V S-II second stage was the liquid hydrogen–fueled second stage of NASA’s Saturn V Moon rocket, providing the crucial mid-ascent propulsion that enabled Apollo missions to reach Earth orbit and proceed toward the Moon.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Saturn V S-II second stage canonical | 2 |
| Saturn V Block II configuration | 1 |
| Saturn V S-II stage | 1 |
| Saturn V second stage (S-II) | 1 |
| Saturn V second stage S-II | 1 |
| Saturn upper stages | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1523623 — 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: Saturn V S-II second stage Context triple: [Rockwell International, developed, Saturn V S-II second stage]
-
A.
Saturn V
Saturn V was a powerful American heavy-lift launch vehicle used during the Apollo and Skylab programs to send astronauts and payloads into space, including missions to the Moon.
-
B.
S-IVB
The S-IVB was the single-engine upper stage of NASA’s Saturn launch vehicles, used to place Apollo spacecraft into Earth orbit and send them toward the Moon.
-
C.
LC-39B
LC-39B is a launch pad at NASA’s Kennedy Space Center that has supported major crewed and uncrewed space missions, including Space Shuttle flights and later Space Launch System operations.
-
D.
LC-39A
LC-39A is a historic launch pad at NASA’s Kennedy Space Center in Florida, used for Apollo Moon missions, Space Shuttle flights, and later commercial launches including SpaceX Falcon rockets.
-
E.
Saturn I
Saturn I was an early American expendable launch vehicle developed by NASA that served as a precursor to the more powerful Saturn IB and Saturn V rockets used in the Apollo program.
- 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: Saturn V S-II second stage Target entity description: The Saturn V S-II second stage was the liquid hydrogen–fueled second stage of NASA’s Saturn V Moon rocket, providing the crucial mid-ascent propulsion that enabled Apollo missions to reach Earth orbit and proceed toward the Moon.
-
A.
Saturn V
Saturn V was a powerful American heavy-lift launch vehicle used during the Apollo and Skylab programs to send astronauts and payloads into space, including missions to the Moon.
-
B.
S-IVB
The S-IVB was the single-engine upper stage of NASA’s Saturn launch vehicles, used to place Apollo spacecraft into Earth orbit and send them toward the Moon.
-
C.
LC-39B
LC-39B is a launch pad at NASA’s Kennedy Space Center that has supported major crewed and uncrewed space missions, including Space Shuttle flights and later Space Launch System operations.
-
D.
LC-39A
LC-39A is a historic launch pad at NASA’s Kennedy Space Center in Florida, used for Apollo Moon missions, Space Shuttle flights, and later commercial launches including SpaceX Falcon rockets.
-
E.
Saturn I
Saturn I was an early American expendable launch vehicle developed by NASA that served as a precursor to the more powerful Saturn IB and Saturn V rockets used in the Apollo program.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Saturn V stage
ⓘ
rocket stage ⓘ |
| burnTime | about 6 minutes ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| developedFor |
Saturn V Block II configuration
ⓘ
linked to:
Saturn V S-II second stage
|
| diameter | about 10.1 m ⓘ |
| dryMass | about 36,000 kg ⓘ |
| engineArrangement | inboard-outboard cluster ⓘ |
| engineType |
J-2 rocket engine
ⓘ
linked to:
J-2
|
| firstFlight | 1967 ⓘ |
| fuelTank | liquid hydrogen tank ⓘ |
| guidanceSystem | controlled by Saturn V Instrument Unit ⓘ |
| ignitionSequence | in-space ignition after S-IC separation ⓘ |
| lastFlight | 1973 ⓘ |
| laterManufacturer |
North American Rockwell
ⓘ
linked to:
Rockwell International
|
| length | about 24.9 m ⓘ |
| manufacturer | North American Aviation ⓘ |
| notableFeature |
large common bulkhead between LOX and LH2 tanks
ⓘ
use of lightweight honeycomb sandwich structures ⓘ |
| numberOfEngines | 5 ⓘ |
| oxidizer | liquid oxygen ⓘ |
| oxidizerTank | liquid oxygen tank ⓘ |
| partOf |
Saturn V launch vehicle
ⓘ
linked to:
Saturn V
|
| program | Apollo program ⓘ |
| propellantMass | about 456,000 kg ⓘ |
| propellantType | liquid hydrogen ⓘ |
| separationFromFirstStage | after S-IC burnout and staging ⓘ |
| status | retired ⓘ |
| structureMaterial | aluminum alloy ⓘ |
| successorEngineTechnology | J-2S (test development only) ⓘ |
| tankConfiguration | common bulkhead ⓘ |
| thrustAtVacuum |
about 1,100,000 lbf
ⓘ
about 5,000 kN ⓘ |
| usedFor |
Apollo program missions
ⓘ
injection into Earth parking orbit ⓘ mid-ascent propulsion ⓘ |
| usedOnMission |
Apollo 10
ⓘ
Apollo 11 ⓘ Apollo 12 ⓘ Apollo 13 ⓘ Apollo 14 ⓘ Apollo 15 ⓘ Apollo 16 ⓘ Apollo 17 ⓘ Apollo 4 ⓘ Apollo 6 ⓘ Apollo 8 ⓘ Apollo 9 ⓘ Skylab 1 (SL-1) ⓘ
linked to:
Skylab 1
|
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: Saturn V S-II second stage Description of subject: The Saturn V S-II second stage was the liquid hydrogen–fueled second stage of NASA’s Saturn V Moon rocket, providing the crucial mid-ascent propulsion that enabled Apollo missions to reach Earth orbit and proceed toward the Moon.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Saturn V S-II second stage
linked to: Saturn V S-II second stage
linked to: Saturn V S-II second stage
linked to: Saturn V S-II second stage