DAN
E86323
DAN is a neutron-detecting scientific instrument on NASA's Curiosity rover used to measure subsurface hydrogen and infer the presence of water on Mars.
All labels observed (1)
| Label | Occurrences |
|---|---|
| DAN canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T727770 — 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: DAN Context triple: [Curiosity rover, instrument, DAN]
-
A.
Dan
Dan is a biblical figure recognized as one of the twelve sons of Jacob and the traditional ancestor of the Tribe of Dan in the Hebrew Bible.
-
B.
Dern
Dern is a surname most prominently associated with American actor Bruce Dern and his family of performers.
-
C.
Danny
Danny is the young boy protagonist of the science-fiction adventure film "Zathura: A Space Adventure," whose discovery of a mysterious board game launches the story’s intergalactic journey.
-
D.
DAK
DAK is the abbreviation for the German Afrika Korps, the German expeditionary force that fought in North Africa during World War II under commanders such as Erwin Rommel.
-
E.
Dennis
Dennis is a coastal town on Cape Cod in Massachusetts known for its beaches, historic charm, and popular summer tourism.
- 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: DAN Target entity description: DAN is a neutron-detecting scientific instrument on NASA's Curiosity rover used to measure subsurface hydrogen and infer the presence of water on Mars.
-
A.
Dan
Dan is a biblical figure recognized as one of the twelve sons of Jacob and the traditional ancestor of the Tribe of Dan in the Hebrew Bible.
-
B.
Dern
Dern is a surname most prominently associated with American actor Bruce Dern and his family of performers.
-
C.
Danny
Danny is the young boy protagonist of the science-fiction adventure film "Zathura: A Space Adventure," whose discovery of a mysterious board game launches the story’s intergalactic journey.
-
D.
DAK
DAK is the abbreviation for the German Afrika Korps, the German expeditionary force that fought in North Africa during World War II under commanders such as Erwin Rommel.
-
E.
Dennis
Dennis is a coastal town on Cape Cod in Massachusetts known for its beaches, historic charm, and popular summer tourism.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
neutron spectrometer
ⓘ
scientific instrument ⓘ spacecraft instrument ⓘ |
| activeModeDescription | uses pulsed neutron generator to irradiate subsurface ⓘ |
| carriedBy | Curiosity rover ⓘ |
| collaboratingCountry | Russia ⓘ |
| contributesTo | mapping of subsurface hydrogen along Curiosity traverse ⓘ |
| dataProduct |
subsurface hydrogen abundance
ⓘ
water-equivalent hydrogen content ⓘ |
| dataUse |
constrain subsurface composition and structure
ⓘ
identify hydrogen-rich layers or deposits ⓘ |
| depthSensitivity | up to about 1 meter below Martian surface ⓘ |
| developedWith |
Russian Space Research Institute (IKI)
ⓘ
linked to:
Space Research Institute of RAS
|
| environment | Martian surface and subsurface ⓘ |
| fieldOfView | subsurface beneath and near the rover ⓘ |
| fullName | Dynamic Albedo of Neutrons ⓘ |
| hostPlanet | Mars ⓘ |
| hostSpacecraft |
Mars Science Laboratory Curiosity rover
ⓘ
linked to:
Curiosity rover
|
| landingDateOnMars | 2012-08-06 ⓘ |
| launchDate | 2011-11-26 ⓘ |
| launchVehicle | Atlas V 541 ⓘ |
| location |
Gale Crater on Mars
ⓘ
linked to:
Gale Crater
|
| measurementType |
epithermal neutrons
ⓘ
neutron albedo ⓘ thermal neutrons ⓘ |
| missionOperator | Jet Propulsion Laboratory ⓘ |
| missionPhase | surface operations ⓘ |
| mountedOn | Curiosity rover chassis ⓘ |
| operatedOn | Mars ⓘ |
| operationalMode |
active mode
ⓘ
passive mode ⓘ |
| partOfMission | Mars Science Laboratory ⓘ |
| passiveModeDescription | measures natural background neutrons from cosmic rays ⓘ |
| powerSource | Curiosity rover power system ⓘ |
| primaryFunction |
detect subsurface hydrogen
ⓘ
measure neutron flux from Martian surface and subsurface ⓘ |
| relatedInstrument | HEND on Mars Odyssey ⓘ |
| scientificDiscipline |
astrobiology
ⓘ
geophysics ⓘ planetary science ⓘ |
| scientificGoal | infer presence of water or hydrated minerals on Mars ⓘ |
| senses | neutrons scattered from Martian regolith ⓘ |
| spaceAgency | NASA ⓘ |
| supportsInvestigation |
characterization of Martian subsurface water distribution
ⓘ
search for past or present habitable environments on Mars ⓘ |
| targetBody | Mars ⓘ |
| usesDetectorType |
helium-3 neutron detectors
ⓘ
proportional counters ⓘ |
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: DAN Description of subject: DAN is a neutron-detecting scientific instrument on NASA's Curiosity rover used to measure subsurface hydrogen and infer the presence of water on Mars.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.