Lockheed Agena upper stage
E835227
The Lockheed Agena upper stage was a versatile rocket stage used extensively during the early U.S. space program as both a satellite booster and maneuverable spacecraft bus for missions including reconnaissance and rendezvous experiments.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Atlas LV-3 Agena-B | 1 |
| Lockheed Agena upper stage canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10022653 — 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: Lockheed Agena upper stage Context triple: [Agena Target Vehicle, developedFrom, Lockheed Agena upper stage]
-
A.
Inertial Upper Stage
The Inertial Upper Stage was a two-stage, solid-fueled rocket used primarily with the Space Shuttle and Titan launch vehicles to boost satellites from low Earth orbit to higher orbits such as geostationary transfer orbit.
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B.
Star 48BV upper stage
The Star 48BV upper stage is a solid-fueled rocket motor used as a high-energy kick stage to boost spacecraft, such as NASA’s Parker Solar Probe, onto their required trajectories.
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C.
Saturn V S-II second stage
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.
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D.
Atlas LV-3C Centaur
Atlas LV-3C Centaur was an early American launch vehicle configuration that first successfully demonstrated the Centaur high-energy upper stage for NASA missions in the 1960s.
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E.
S-IV
S-IV was the liquid-fueled second stage of the early Saturn I launch vehicle, powered by a cluster of RL10 engines and used in NASA’s Apollo-era test flights.
- 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: Lockheed Agena upper stage Target entity description: The Lockheed Agena upper stage was a versatile rocket stage used extensively during the early U.S. space program as both a satellite booster and maneuverable spacecraft bus for missions including reconnaissance and rendezvous experiments.
-
A.
Inertial Upper Stage
The Inertial Upper Stage was a two-stage, solid-fueled rocket used primarily with the Space Shuttle and Titan launch vehicles to boost satellites from low Earth orbit to higher orbits such as geostationary transfer orbit.
-
B.
Star 48BV upper stage
The Star 48BV upper stage is a solid-fueled rocket motor used as a high-energy kick stage to boost spacecraft, such as NASA’s Parker Solar Probe, onto their required trajectories.
-
C.
Saturn V S-II second stage
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.
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D.
Atlas LV-3C Centaur
Atlas LV-3C Centaur was an early American launch vehicle configuration that first successfully demonstrated the Centaur high-energy upper stage for NASA missions in the 1960s.
-
E.
S-IV
S-IV was the liquid-fueled second stage of the early Saturn I launch vehicle, powered by a cluster of RL10 engines and used in NASA’s Apollo-era test flights.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
rocket upper stage
ⓘ
spacecraft bus ⓘ |
| alsoKnownAs | Agena NERFINISHED ⓘ |
| capability |
multiple restarts
ⓘ
on-orbit maneuvering ⓘ precision orbit insertion ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| developedFor | military reconnaissance missions ⓘ |
| family | Agena rocket stages NERFINISHED ⓘ |
| firstFlightYear | 1959 ⓘ |
| guidanceCapability | independent guidance system ⓘ |
| historicalSignificance | enabled first successful U.S. photo-reconnaissance satellites ⓘ |
| launchConfiguration | two-stage launch vehicle upper stage ⓘ |
| manufacturer | Lockheed NERFINISHED ⓘ |
| notableFeature |
integrated attitude control system
ⓘ
served as both propulsion and spacecraft bus ⓘ |
| notableUse |
Corona reconnaissance satellite program
NERFINISHED
ⓘ
GAMBIT reconnaissance satellite program NERFINISHED ⓘ Gemini rendezvous target vehicle ⓘ KH-7 reconnaissance satellites NERFINISHED ⓘ KH-8 reconnaissance satellites NERFINISHED ⓘ |
| operatedBy |
NASA
ⓘ
National Reconnaissance Office NERFINISHED ⓘ United States Air Force ⓘ |
| orbitTypeSupported |
highly elliptical orbit
ⓘ
low Earth orbit ⓘ polar orbit ⓘ |
| oxidizer | IRFNA ⓘ |
| propellantType |
UDMH
ⓘ
hypergolic propellants ⓘ |
| retirementPeriod | 1980s ⓘ |
| roleInGeminiProgram | target vehicle for orbital rendezvous ⓘ |
| status | retired ⓘ |
| usedAs |
maneuverable spacecraft bus
ⓘ
satellite booster ⓘ |
| usedBy | US intelligence community NERFINISHED ⓘ |
| usedFor |
reconnaissance missions
ⓘ
rendezvous experiments ⓘ |
| usedInMissionType |
orbital rendezvous
ⓘ
reconnaissance satellite deployment ⓘ satellite launch ⓘ |
| usedInProgram | early U.S. space program ⓘ |
| usedWith |
Atlas rocket
NERFINISHED
ⓘ
Thor rocket NERFINISHED ⓘ Titan II launch vehicle NERFINISHED ⓘ Titan IIIB rocket NERFINISHED ⓘ |
| variant |
Agena A
NERFINISHED
ⓘ
Agena B NERFINISHED ⓘ Agena D NERFINISHED ⓘ |
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: Lockheed Agena upper stage Description of subject: The Lockheed Agena upper stage was a versatile rocket stage used extensively during the early U.S. space program as both a satellite booster and maneuverable spacecraft bus for missions including reconnaissance and rendezvous experiments.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Atlas LV-3 Agena-B