Lunar Prospector
E648453
Lunar Prospector was a NASA lunar orbiter mission that mapped the Moon’s surface composition and gravity field and provided strong evidence for the presence of water ice at the lunar poles.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lunar Prospector canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7210425 — 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: Lunar Prospector Context triple: [NASA Discovery Program, mission, Lunar Prospector]
-
A.
Luna spacecraft
The Luna spacecraft were a series of Soviet robotic probes launched between the late 1950s and 1970s that achieved many lunar exploration firsts, including the first human-made object to reach the Moon and the first soft landing on its surface.
-
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.
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C.
Moon Impact Probe
The Moon Impact Probe was a small Indian lunar probe designed to detach from the Chandrayaan-1 spacecraft and intentionally crash onto the Moon’s surface to conduct scientific measurements and demonstrate landing technologies.
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D.
Selenological and Engineering Explorer
Selenological and Engineering Explorer, also known as Kaguya (SELENE), was a Japanese lunar orbiter mission launched by JAXA to study the Moon’s origin, evolution, and surface in unprecedented detail.
-
E.
Viking Orbiter
Viking Orbiter was a pair of NASA spacecraft launched in the 1970s that orbited Mars to map its surface, study its atmosphere, and support the Viking landers.
- 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: Lunar Prospector Target entity description: Lunar Prospector was a NASA lunar orbiter mission that mapped the Moon’s surface composition and gravity field and provided strong evidence for the presence of water ice at the lunar poles.
-
A.
Luna spacecraft
The Luna spacecraft were a series of Soviet robotic probes launched between the late 1950s and 1970s that achieved many lunar exploration firsts, including the first human-made object to reach the Moon and the first soft landing on its surface.
-
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.
Moon Impact Probe
The Moon Impact Probe was a small Indian lunar probe designed to detach from the Chandrayaan-1 spacecraft and intentionally crash onto the Moon’s surface to conduct scientific measurements and demonstrate landing technologies.
-
D.
Selenological and Engineering Explorer
Selenological and Engineering Explorer, also known as Kaguya (SELENE), was a Japanese lunar orbiter mission launched by JAXA to study the Moon’s origin, evolution, and surface in unprecedented detail.
-
E.
Viking Orbiter
Viking Orbiter was a pair of NASA spacecraft launched in the 1970s that orbited Mars to map its surface, study its atmosphere, and support the Viking landers.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
NASA spacecraft
ⓘ
lunar orbiter ⓘ planetary science mission ⓘ |
| apoapsisBody | Moon NERFINISHED ⓘ |
| carriedInstrument |
Alpha Particle Spectrometer
NERFINISHED
ⓘ
Doppler Gravity Experiment NERFINISHED ⓘ Electron Reflectometer NERFINISHED ⓘ Gamma-Ray Spectrometer NERFINISHED ⓘ Magnetometer ⓘ Neutron Spectrometer NERFINISHED ⓘ |
| confirmedPresenceOf | enhanced hydrogen at lunar poles ⓘ |
| costCategory | low-cost planetary mission ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| discovery | strong evidence for water ice at lunar poles ⓘ |
| endOfMission | 1999-07-31 ⓘ |
| extendedMissionDuration | approximately 6 months ⓘ |
| foundEvidenceOf | water ice in permanently shadowed craters ⓘ |
| impactedBody | Moon NERFINISHED ⓘ |
| impactSite | near lunar south pole ⓘ |
| launchCountry |
United States of America
ⓘ
surface form:
United States
|
| launchDate | 1998-01-07 ⓘ |
| launchSite | Cape Canaveral Air Station Space Launch Complex 46 NERFINISHED ⓘ |
| launchVehicle | Athena II NERFINISHED ⓘ |
| missionTermination | deliberate impact into lunar surface ⓘ |
| missionType |
lunar orbiter mission
ⓘ
lunar science mission ⓘ |
| objective |
map lunar gravity field
ⓘ
map lunar surface composition ⓘ search for water ice at lunar poles ⓘ study lunar magnetic field ⓘ study lunar outgassing ⓘ |
| operatedBy | NASA Ames Research Center NERFINISHED ⓘ |
| operator | NASA ⓘ |
| orbitType | polar lunar orbit ⓘ |
| periapsisBody | Moon NERFINISHED ⓘ |
| powerSource | solar powered spacecraft ⓘ |
| primaryMissionDuration | 1 year ⓘ |
| program | NASA Discovery Program NERFINISHED ⓘ |
| scientificResult |
constraints on distribution of polar hydrogen deposits
ⓘ
detailed lunar gravity field model ⓘ global maps of lunar elemental composition ⓘ |
| spaceAgency | NASA ⓘ |
| spacecraftBus | spin-stabilized spacecraft ⓘ |
| stabilization | spin-stabilized ⓘ |
| suggestedPresenceOf | water ice mixed with regolith at lunar poles ⓘ |
| target | Moon 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: Lunar Prospector Description of subject: Lunar Prospector was a NASA lunar orbiter mission that mapped the Moon’s surface composition and gravity field and provided strong evidence for the presence of water ice at the lunar poles.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.