Atlas V 421
E525240
Atlas V 421 is a specific medium-lift configuration of the Atlas V launch vehicle, featuring a 4-meter payload fairing, two solid rocket boosters, and a single-engine Centaur upper stage.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Atlas V 421 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T5458668 — 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: Atlas V 421 Context triple: [Atlas V, configurationOptions, Atlas V 421]
-
A.
Atlas V 541
Atlas V 541 is a heavy-lift configuration of the Atlas V expendable launch system used by NASA to send large interplanetary spacecraft, such as the Curiosity Mars rover, into space.
-
B.
Atlas V 551
Atlas V 551 is a heavy-lift configuration of the Atlas V expendable launch system, featuring a five-meter fairing and five solid rocket boosters, used for high-energy missions such as interplanetary probes.
-
C.
Atlas V 411
Atlas V 411 is a specific variant of the Atlas V expendable launch vehicle characterized by a single solid rocket booster and a four-meter payload fairing, used to place satellites and spacecraft into orbit.
-
D.
Atlas V
Atlas V is an expendable, medium- to heavy-lift launch vehicle developed by United Launch Alliance and widely used for deploying satellites and space probes into orbit.
-
E.
Delta IV Heavy
Delta IV Heavy is a powerful American expendable heavy-lift launch vehicle developed by United Launch Alliance, known for carrying large payloads to orbit and supporting national security and scientific missions.
- 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: Atlas V 421 Target entity description: Atlas V 421 is a specific medium-lift configuration of the Atlas V launch vehicle, featuring a 4-meter payload fairing, two solid rocket boosters, and a single-engine Centaur upper stage.
-
A.
Atlas V 541
Atlas V 541 is a heavy-lift configuration of the Atlas V expendable launch system used by NASA to send large interplanetary spacecraft, such as the Curiosity Mars rover, into space.
-
B.
Atlas V 551
Atlas V 551 is a heavy-lift configuration of the Atlas V expendable launch system, featuring a five-meter fairing and five solid rocket boosters, used for high-energy missions such as interplanetary probes.
-
C.
Atlas V 411
Atlas V 411 is a specific variant of the Atlas V expendable launch vehicle characterized by a single solid rocket booster and a four-meter payload fairing, used to place satellites and spacecraft into orbit.
-
D.
Atlas V
Atlas V is an expendable, medium- to heavy-lift launch vehicle developed by United Launch Alliance and widely used for deploying satellites and space probes into orbit.
-
E.
Delta IV Heavy
Delta IV Heavy is a powerful American expendable heavy-lift launch vehicle developed by United Launch Alliance, known for carrying large payloads to orbit and supporting national security and scientific missions.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
Atlas V launch vehicle configuration
ⓘ
expendable launch system ⓘ |
| boosterCodeDigit | 2 ⓘ |
| centaurEngineCodeDigit | 1 ⓘ |
| configurationFeatures |
4-meter payload fairing
ⓘ
single-engine Centaur upper stage ⓘ two strap-on solid rocket boosters ⓘ |
| coreStageEngineType | RD-180 ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| designPurpose | medium-class payloads to GTO and LEO ⓘ |
| fairingCodeDigit | 4 ⓘ |
| fairingDiameter | 4 meters ⓘ |
| fairingType | 4 m short payload fairing ⓘ |
| family | Atlas V ⓘ |
| familyCode | 421 ⓘ |
| familyGeneration | Atlas V 400 series ⓘ |
| firstStageName | Common Core Booster ⓘ |
| guidanceSystem | inertial guidance with GPS augmentation ⓘ |
| launchServiceProvider | United Launch Alliance ⓘ |
| launchSitesUsed |
Cape Canaveral Space Force Station SLC-41
ⓘ
linked to:
Cape Canaveral LC-41
Vandenberg Space Force Base SLC-3E ⓘ |
| launchVehicleFamily | Atlas family of launch vehicles ⓘ |
| launchVehicleType | medium-lift launch vehicle ⓘ |
| manufacturer | United Launch Alliance ⓘ |
| missionTypes |
Earth-orbit missions
ⓘ
communications satellite launches ⓘ military payload launches ⓘ |
| numberOfSolidRocketBoosters | 2 ⓘ |
| payloadFairingDiameter | 4-meter payload fairing ⓘ |
| propellantTypeFirstStage | RP-1/LOX ⓘ |
| propellantTypeUpperStage | LH2/LOX ⓘ |
| solidRocketBoosterType |
AJ-60A
ⓘ
linked to:
AJ-60 series
|
| stages | 2 ⓘ |
| status | operational ⓘ |
| upperStage | single-engine Centaur ⓘ |
| upperStageEngineCount | 1 ⓘ |
| upperStageEngineType | RL10 ⓘ |
| upperStageName | Centaur ⓘ |
| usage |
U.S. government payload launches
ⓘ
commercial satellite launches ⓘ |
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: Atlas V 421 Description of subject: Atlas V 421 is a specific medium-lift configuration of the Atlas V launch vehicle, featuring a 4-meter payload fairing, two solid rocket boosters, and a single-engine Centaur upper stage.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.