25143 Itokawa
E422028
25143 Itokawa is a small, peanut-shaped near-Earth asteroid that became the first celestial body from which samples were returned to Earth by the Japanese Hayabusa mission.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 25143 Itokawa canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4214789 — 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: 25143 Itokawa Context triple: [Hayabusa, target, 25143 Itokawa]
-
A.
20000 Varuna
20000 Varuna is a large trans-Neptunian object in the Kuiper Belt, notable for its rapid rotation, elongated shape, and status as one of the earliest discovered significant bodies beyond Neptune.
-
B.
2004 DW
2004 DW is the provisional designation for Orcus, a large Kuiper Belt dwarf-planet candidate often compared to Pluto in size and orbital characteristics.
-
C.
S/24111
S/24111 is the United Nations document symbol assigned to the landmark 1992 report "An Agenda for Peace," which outlined proposals for strengthening the UN’s role in preventive diplomacy, peacemaking, and peacekeeping after the Cold War.
-
D.
Asteroid 1762 Russell
Asteroid 1762 Russell is a main-belt asteroid named in honor of American astronomer Henry Norris Russell, known for his work on stellar classification and the Hertzsprung–Russell diagram.
-
E.
asteroid 944 Hidalgo
Asteroid 944 Hidalgo is a large, eccentric, comet-like minor planet that orbits between the inner and outer solar system, making it one of the first known centaur objects.
- 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: 25143 Itokawa Target entity description: 25143 Itokawa is a small, peanut-shaped near-Earth asteroid that became the first celestial body from which samples were returned to Earth by the Japanese Hayabusa mission.
-
A.
20000 Varuna
20000 Varuna is a large trans-Neptunian object in the Kuiper Belt, notable for its rapid rotation, elongated shape, and status as one of the earliest discovered significant bodies beyond Neptune.
-
B.
2004 DW
2004 DW is the provisional designation for Orcus, a large Kuiper Belt dwarf-planet candidate often compared to Pluto in size and orbital characteristics.
-
C.
S/24111
S/24111 is the United Nations document symbol assigned to the landmark 1992 report "An Agenda for Peace," which outlined proposals for strengthening the UN’s role in preventive diplomacy, peacemaking, and peacekeeping after the Cold War.
-
D.
Asteroid 1762 Russell
Asteroid 1762 Russell is a main-belt asteroid named in honor of American astronomer Henry Norris Russell, known for his work on stellar classification and the Hertzsprung–Russell diagram.
-
E.
asteroid 944 Hidalgo
Asteroid 944 Hidalgo is a large, eccentric, comet-like minor planet that orbits between the inner and outer solar system, making it one of the first known centaur objects.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Apollo asteroid
ⓘ
S-type asteroid ⓘ binary-lobed asteroid ⓘ near-Earth asteroid ⓘ small Solar System body ⓘ |
| absoluteMagnitude | 19.2 ⓘ |
| albedo | 0.29 ⓘ |
| aphelionDistance | 1.695 AU ⓘ |
| belongsTo | inner Solar System ⓘ |
| belongsToDynamicalGroup | Apollo group ONNED1 ⓘ |
| bulkDensity | 1.9 g/cm³ ⓘ |
| discoveredBy | LINEAR ONNED1 ⓘ |
| discoveryDate | 1998-09-26 ⓘ |
| eccentricity | 0.280 ⓘ |
| escapeVelocity | ~0.2 m/s ⓘ |
| firstAsteroidWithSampleReturn | true ⓘ |
| firstBodyWithSampleReturnByJapan | true ⓘ |
| firstSpacecraftRendezvousDate | 2005-09-12 ⓘ |
| hasAlternativeDesignation | 1998 SF36 ONNED1 ⓘ |
| hasAlternativeName | Itokawa ONNED1 ⓘ |
| hasBoulders | yes ⓘ |
| hasContactBinaryMorphology | yes ⓘ |
| hasLobe |
body
ⓘ
head ⓘ |
| hasRegolith | yes ⓘ |
| hasScientificSignificance |
constraints on rubble-pile asteroid structure
ⓘ
study of space weathering on S-type asteroids ⓘ |
| hasShape | peanut-shaped ⓘ |
| height | 0.209 km ⓘ |
| inclination | 1.62 degrees ⓘ |
| isPotentiallyHazardousAsteroid | no ⓘ |
| length | 0.535 km ⓘ |
| mass | 3.51×10^10 kg ⓘ |
| meanDiameter | 0.33 km ⓘ |
| minimumOrbitIntersectionDistanceWithEarth | 0.013 AU ⓘ |
| namedAfter | Hideo Itokawa NERFINISHED ⓘ |
| orbitalPeriod |
1.52 years
ⓘ
556 days ⓘ |
| orbits | Sun ONNED1 ⓘ |
| perihelionDistance | 0.953 AU ⓘ |
| rotationPeriod | 12.132 hours ⓘ |
| sampleReturnArrivalOnEarth | 2010-06-13 ⓘ |
| semiMajorAxis | 1.324 AU ⓘ |
| spectralType | S(IV) ⓘ |
| surfaceGravity | ~10^-4 g ⓘ |
| surfaceSampleReturnedBy | Hayabusa NERFINISHED ⓘ |
| visitedBy | Hayabusa NERFINISHED ⓘ |
| width | 0.294 km ⓘ |
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: 25143 Itokawa Description of subject: 25143 Itokawa is a small, peanut-shaped near-Earth asteroid that became the first celestial body from which samples were returned to Earth by the Japanese Hayabusa mission.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hayabusa