Explorer 71
E722099
Explorer 71 is a NASA Explorer-series scientific satellite better known as the Advanced Composition Explorer (ACE), designed to study energetic particles from the Sun, the interplanetary medium, and galactic sources.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Explorer 71 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T8264564 — 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: Explorer 71 Context triple: [ACE spacecraft, explorerDesignation, Explorer 71]
-
A.
Explorer 3 mission
The Explorer 3 mission was an early U.S. satellite flight in 1958 that helped confirm the existence of the Van Allen radiation belts through its onboard scientific instruments.
-
B.
Ranger spacecraft
The Ranger spacecraft is a fictional advanced space vehicle featured in the film "Interstellar," used for planetary exploration and piloted by astronaut Joseph Cooper.
-
C.
Magellan spacecraft
The Magellan spacecraft was a NASA robotic probe launched in 1989 that used radar mapping to produce the first detailed global images of the surface of Venus.
-
D.
Ulysses spacecraft
The Ulysses spacecraft was a joint ESA–NASA mission launched in 1990 to study the Sun’s polar regions and the heliosphere from a unique high-inclination orbit.
-
E.
Pioneer 7
Pioneer 7 was a NASA space probe launched in 1966 as part of the Pioneer program to study the solar wind, interplanetary magnetic fields, and cosmic rays in deep space.
- 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: Explorer 71 Target entity description: Explorer 71 is a NASA Explorer-series scientific satellite better known as the Advanced Composition Explorer (ACE), designed to study energetic particles from the Sun, the interplanetary medium, and galactic sources.
-
A.
Explorer 3 mission
The Explorer 3 mission was an early U.S. satellite flight in 1958 that helped confirm the existence of the Van Allen radiation belts through its onboard scientific instruments.
-
B.
Ranger spacecraft
The Ranger spacecraft is a fictional advanced space vehicle featured in the film "Interstellar," used for planetary exploration and piloted by astronaut Joseph Cooper.
-
C.
Magellan spacecraft
The Magellan spacecraft was a NASA robotic probe launched in 1989 that used radar mapping to produce the first detailed global images of the surface of Venus.
-
D.
Ulysses spacecraft
The Ulysses spacecraft was a joint ESA–NASA mission launched in 1990 to study the Sun’s polar regions and the heliosphere from a unique high-inclination orbit.
-
E.
Pioneer 7
Pioneer 7 was a NASA space probe launched in 1966 as part of the Pioneer program to study the solar wind, interplanetary magnetic fields, and cosmic rays in deep space.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
NASA Explorer-series satellite
ⓘ
scientific satellite ⓘ |
| abbreviation | ACE ⓘ |
| alsoKnownAs | Advanced Composition Explorer ⓘ |
| contractor | Johns Hopkins University Applied Physics Laboratory ⓘ |
| dataUse |
early warning of geomagnetic storms
ⓘ
research on galactic cosmic rays ⓘ research on solar energetic particle events ⓘ space weather forecasting ⓘ |
| distanceFromEarth | about 1.5 million kilometers ⓘ |
| instrument |
CRIS
ⓘ
linked to:
CrIS
EPAM ⓘ MAG ⓘ SIS ⓘ SWEPAM ⓘ SWICS ⓘ SWIMS ⓘ ULEIS ⓘ |
| launchCountry |
United States
ⓘ
linked to:
United States of America
|
| launchDate | 1997-08-25 ⓘ |
| launchSite | Cape Canaveral Air Station Space Launch Complex 17A ⓘ |
| launchVehicle |
Delta II 7920-8
ⓘ
linked to:
Delta II
|
| location |
Sun–Earth L1 Lagrange point vicinity
ⓘ
linked to:
Sun–Earth L1 Lagrange point
|
| managedBy |
NASA Goddard Space Flight Center
ⓘ
linked to:
Goddard Space Flight Center
|
| manufacturer | Johns Hopkins University Applied Physics Laboratory ⓘ |
| missionType |
heliophysics mission
ⓘ
solar and heliospheric observatory ⓘ space physics mission ⓘ |
| operator | NASA ⓘ |
| orbit | halo orbit around Sun–Earth L1 Lagrange point ⓘ |
| orbitRegime | Sun–Earth L1 ⓘ |
| orbitType | Lissajous/halo orbit ⓘ |
| power | about 470 watts ⓘ |
| primaryTarget |
energetic particles
ⓘ
interplanetary magnetic field ⓘ solar wind ⓘ |
| program |
Explorer program
ⓘ
linked to:
NASA Explorer Program
|
| purpose |
measure composition of energetic particles
ⓘ
measure composition of solar wind particles ⓘ study energetic particles from galactic sources ⓘ study energetic particles from the Sun ⓘ study energetic particles in the interplanetary medium ⓘ |
| scienceTeamInstitution |
California Institute of Technology
ⓘ
Princeton University ⓘ University of Maryland ⓘ |
| spacecraftBus | ACE spacecraft bus ⓘ |
| spacecraftMass | about 785 kilograms ⓘ |
| status | operational ⓘ |
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: Explorer 71 Description of subject: Explorer 71 is a NASA Explorer-series scientific satellite better known as the Advanced Composition Explorer (ACE), designed to study energetic particles from the Sun, the interplanetary medium, and galactic sources.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.