EQUilibriUm Lunar-Earth point 6U Spacecraft
E1010247
EQUilibriUm Lunar-Earth point 6U Spacecraft (EQUULEUS) is a JAXA-developed 6U CubeSat designed to demonstrate low-energy trajectory technologies and observe Earth's plasmasphere while operating near the Earth–Moon Lagrange points.
All labels observed (1)
| Label | Occurrences |
|---|---|
| EQUilibriUm Lunar-Earth point 6U Spacecraft canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12953698 — 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: EQUilibriUm Lunar-Earth point 6U Spacecraft Context triple: [EQUULEUS, fullName, EQUilibriUm Lunar-Earth point 6U Spacecraft]
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A.
Earth–Moon L1 point
The Earth–Moon L1 point is a gravitational equilibrium location between Earth and the Moon where spacecraft can maintain a relatively stable position with minimal fuel, often using Lissajous or halo orbits for observation or transfer missions.
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B.
Lissajous orbit
A Lissajous orbit is a stable, looping three-dimensional trajectory around a Lagrange point, commonly used by space observatories to maintain a relatively constant position with respect to Earth and the Sun.
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C.
Earth–Moon L2 point
The Earth–Moon L2 point is a gravitationally stable location beyond the Moon where the combined gravity of Earth and the Moon allows spacecraft to maintain a relatively fixed position with minimal fuel.
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D.
Earth–Moon barycenter
The Earth–Moon barycenter is the common center of mass around which both Earth and the Moon orbit in their mutual gravitational interaction.
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E.
Sun–Earth L2
Sun–Earth L2 is a gravitationally stable point in space located beyond Earth's orbit where the combined gravity of the Sun and Earth allows spacecraft, such as the James Webb Space Telescope, to maintain a relatively constant position with minimal fuel use.
- 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: EQUilibriUm Lunar-Earth point 6U Spacecraft Target entity description: EQUilibriUm Lunar-Earth point 6U Spacecraft (EQUULEUS) is a JAXA-developed 6U CubeSat designed to demonstrate low-energy trajectory technologies and observe Earth's plasmasphere while operating near the Earth–Moon Lagrange points.
-
A.
Earth–Moon L1 point
The Earth–Moon L1 point is a gravitational equilibrium location between Earth and the Moon where spacecraft can maintain a relatively stable position with minimal fuel, often using Lissajous or halo orbits for observation or transfer missions.
-
B.
Lissajous orbit
A Lissajous orbit is a stable, looping three-dimensional trajectory around a Lagrange point, commonly used by space observatories to maintain a relatively constant position with respect to Earth and the Sun.
-
C.
Earth–Moon L2 point
The Earth–Moon L2 point is a gravitationally stable location beyond the Moon where the combined gravity of Earth and the Moon allows spacecraft to maintain a relatively fixed position with minimal fuel.
-
D.
Earth–Moon barycenter
The Earth–Moon barycenter is the common center of mass around which both Earth and the Moon orbit in their mutual gravitational interaction.
-
E.
Sun–Earth L2
Sun–Earth L2 is a gravitationally stable point in space located beyond Earth's orbit where the combined gravity of the Sun and Earth allows spacecraft, such as the James Webb Space Telescope, to maintain a relatively constant position with minimal fuel use.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
6U CubeSat
ⓘ
CubeSat ⓘ interplanetary CubeSat ⓘ spacecraft ⓘ |
| acronym | EQUULEUS NERFINISHED ⓘ |
| alsoKnownAs | EQUULEUS NERFINISHED ⓘ |
| collaboratingInstitution |
JAXA Institute of Space and Astronautical Science
NERFINISHED
ⓘ
University of Tokyo NERFINISHED ⓘ |
| communicationBand |
S-band
ⓘ
X-band ⓘ |
| countryOfOrigin | Japan ⓘ |
| developer |
JAXA
NERFINISHED
ⓘ
University of Tokyo NERFINISHED ⓘ |
| formFactor | 6U ⓘ |
| isPartOf | Artemis I CubeSat payloads ⓘ |
| launchComplex | LC-39B NERFINISHED ⓘ |
| launchDate | 2022-11-16 ⓘ |
| launchMission | Artemis I NERFINISHED ⓘ |
| launchSite | Kennedy Space Center NERFINISHED ⓘ |
| launchVehicle | Space Launch System NERFINISHED ⓘ |
| launchVehicleVariant | SLS Block 1 NERFINISHED ⓘ |
| mass | approximately 12 kg ⓘ |
| missionStatus | launched ⓘ |
| missionType |
scientific observation
ⓘ
technology demonstration ⓘ |
| observationTarget |
Earth’s plasmasphere
NERFINISHED
ⓘ
near-Earth space environment ⓘ |
| onboardInstrument |
CLOTH dust detector
NERFINISHED
ⓘ
DELPHINUS UV imager NERFINISHED ⓘ PHOENIX X-ray imaging detector NERFINISHED ⓘ |
| operationalEnvironment |
Earth–Moon Lagrange region
NERFINISHED
ⓘ
cislunar space ⓘ |
| powerSource | solar panels ⓘ |
| primaryObjective |
demonstrate low-energy trajectory technologies
ⓘ
observe Earth plasmasphere ⓘ |
| program | Artemis secondary payloads NERFINISHED ⓘ |
| propulsionSystem | AQUARIUS water propulsion system NERFINISHED ⓘ |
| propulsionType | water-resistojet propulsion ⓘ |
| scienceObjective |
image Earth’s plasmasphere in extreme ultraviolet
ⓘ
monitor space weather effects near Earth ⓘ study plasmaspheric dynamics ⓘ |
| spaceAgency | Japan Aerospace Exploration Agency NERFINISHED ⓘ |
| targetRegion |
Earth–Moon L2 vicinity
NERFINISHED
ⓘ
Earth–Moon Lagrange points NERFINISHED ⓘ |
| trajectoryType |
ballistic lunar transfer
ⓘ
low-energy trajectory ⓘ |
| usesTechnology |
low-thrust trajectory design
ⓘ
weak stability boundary transfers ⓘ |
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: EQUilibriUm Lunar-Earth point 6U Spacecraft Description of subject: EQUilibriUm Lunar-Earth point 6U Spacecraft (EQUULEUS) is a JAXA-developed 6U CubeSat designed to demonstrate low-energy trajectory technologies and observe Earth's plasmasphere while operating near the Earth–Moon Lagrange points.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
EQUULEUS