Delta IV
E306616
Delta IV is an expendable heavy-lift launch vehicle family developed by Boeing and operated by United Launch Alliance for launching military, government, and commercial payloads into orbit.
All labels observed (11)
| Label | Occurrences |
|---|---|
| Delta IV canonical | 17 |
| Delta IV Medium | 8 |
| Delta IV launch vehicle | 3 |
| Delta IV M+(4,2) | 1 |
| Delta IV M+(5,2) | 1 |
| Delta IV Medium+ (4,2) | 1 |
| Delta IV Medium+ (5,2) | 1 |
| Delta IV Medium+ (5,4) | 1 |
| Delta IV Medium+ variants | 1 |
| Delta IV program | 1 |
| ULA Delta IV launch program | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2864394 — 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: Delta IV Context triple: [United Launch Alliance, operatesRocket, Delta IV]
-
A.
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.
-
B.
Space Delta 4
Space Delta 4 is a unit of the U.S. Space Force responsible for providing strategic and tactical missile warning and related space-based surveillance capabilities.
-
C.
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.
-
D.
Delta IV upper stage
The Delta IV upper stage is the cryogenic second stage of the Delta IV launch vehicle, designed to perform precise orbital insertions using liquid hydrogen and liquid oxygen propellants.
-
E.
Atlas II
Atlas II was an American expendable launch vehicle family developed by General Dynamics and later Lockheed Martin, used primarily in the 1990s to launch commercial and military satellites into orbit.
- 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: Delta IV Target entity description: Delta IV is an expendable heavy-lift launch vehicle family developed by Boeing and operated by United Launch Alliance for launching military, government, and commercial payloads into orbit.
-
A.
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.
-
B.
Space Delta 4
Space Delta 4 is a unit of the U.S. Space Force responsible for providing strategic and tactical missile warning and related space-based surveillance capabilities.
-
C.
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.
-
D.
Delta IV upper stage
The Delta IV upper stage is the cryogenic second stage of the Delta IV launch vehicle, designed to perform precise orbital insertions using liquid hydrogen and liquid oxygen propellants.
-
E.
Atlas II
Atlas II was an American expendable launch vehicle family developed by General Dynamics and later Lockheed Martin, used primarily in the 1990s to launch commercial and military satellites into orbit.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
expendable launch vehicle family
ⓘ
heavy-lift launch vehicle ⓘ orbital launch vehicle ⓘ |
| configuration | two-stage rocket ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designFeature | Common Booster Core ⓘ |
| developer | Boeing ⓘ |
| engineType |
RS-68 engine
ⓘ
surface form:
RS-68
|
| family | Delta IV self-linksurface differs ⓘ |
| familyMember |
Delta IV Heavy
ⓘ
Delta IV self-linksurface differs ⓘ
surface form:
Delta IV Medium
Delta IV self-linksurface differs ⓘ
surface form:
Delta IV Medium+ (4,2)
Delta IV self-linksurface differs ⓘ
surface form:
Delta IV Medium+ (5,2)
Delta IV self-linksurface differs ⓘ
surface form:
Delta IV Medium+ (5,4)
|
| firstFlightDate |
2002-11-20
ⓘ
2004-12-21 ⓘ |
| firstFlightLaunchSite | Cape Canaveral Air Force Station Space Launch Complex 37B ⓘ |
| firstFlightVehicle |
Delta IV
self-linksurface differs
ⓘ
surface form:
Delta IV Medium
|
| launchCapability |
heavy-lift
ⓘ
medium-lift ⓘ |
| launchConfiguration |
single-core
ⓘ
three Common Booster Cores ⓘ triple-core ⓘ |
| launchProvider | United Launch Alliance ⓘ |
| launchSite |
Cape Canaveral LC-37B
ⓘ
surface form:
Cape Canaveral Space Force Station SLC-37B
Space Launch Complex 6 ⓘ
surface form:
Vandenberg Space Force Base SLC-6
|
| manufacturer | Boeing ⓘ |
| marketSegment | EELV program ⓘ |
| notableCustomer |
National Reconnaissance Office
ⓘ
United States Air Force ⓘ |
| operator | United Launch Alliance ⓘ |
| oxidizer | liquid oxygen ⓘ |
| predecessor |
Delta rocket
ⓘ
surface form:
Delta II
Delta III ⓘ |
| program | Evolved Expendable Launch Vehicle program ⓘ |
| propellantType |
liquid hydrogen
ⓘ
liquid oxygen ⓘ |
| retirementReason | high launch cost compared to competitors ⓘ |
| status | retired ⓘ |
| successor | Vulcan Centaur ⓘ |
| upperStageEngine |
RL10
ⓘ
surface form:
RL10B-2
|
| usedFor |
commercial payload launches
ⓘ
geostationary transfer orbit missions ⓘ government payload launches ⓘ high-energy missions ⓘ high-mass payloads to geostationary transfer orbit ⓘ military payload launches ⓘ national security space missions ⓘ |
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: Delta IV Description of subject: Delta IV is an expendable heavy-lift launch vehicle family developed by Boeing and operated by United Launch Alliance for launching military, government, and commercial payloads into orbit.
Referenced by (36)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Delta IV launch vehicle
this entity surface form:
Delta IV Medium+ variants
this entity surface form:
Delta IV launch vehicle
this entity surface form:
Delta IV Medium
this entity surface form:
Delta IV M+(4,2)
this entity surface form:
Delta IV M+(5,2)
this entity surface form:
Delta IV Medium
this entity surface form:
Delta IV program
this entity surface form:
Delta IV Medium
this entity surface form:
ULA Delta IV launch program
this entity surface form:
Delta IV Medium
this entity surface form:
Delta IV Medium+ (4,2)
this entity surface form:
Delta IV Medium+ (5,2)
this entity surface form:
Delta IV Medium+ (5,4)
this entity surface form:
Delta IV Medium
subject surface form:
RS-68
subject surface form:
RS-68
this entity surface form:
Delta IV Medium
subject surface form:
RS-68
this entity surface form:
Delta IV launch vehicle
this entity surface form:
Delta IV Medium
this entity surface form:
Delta IV Medium