162173 Ryugu
E423752
Apollo-group asteroid
C-type asteroid
carbonaceous asteroid
near-Earth asteroid
potentially hazardous asteroid
small Solar System body
162173 Ryugu is a near-Earth carbonaceous asteroid studied up close and sampled by Japan’s Hayabusa2 spacecraft for insights into the early solar system and organic materials.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 162173 Ryugu canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4236674 — 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: 162173 Ryugu Context triple: [Hayabusa2, target, 162173 Ryugu]
-
A.
Ginga
Ginga was a Japanese X-ray astronomy satellite that conducted important observations of cosmic X-ray sources in the late 1980s and early 1990s.
-
B.
25143 Itokawa
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.
-
C.
Hōshō
Hōshō was the Imperial Japanese Navy’s pioneering aircraft carrier and the world’s first purpose-built carrier to enter service.
-
D.
Yamagumo
Yamagumo was a Japanese Navy destroyer that served in World War II and was sunk during the Battle of Surigao Strait, part of the larger Battle of Leyte Gulf.
-
E.
Shimotsuki
Shimotsuki was a Japanese destroyer of the Imperial Japanese Navy that served in World War II before being sunk in late 1944.
- 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: 162173 Ryugu Target entity description: 162173 Ryugu is a near-Earth carbonaceous asteroid studied up close and sampled by Japan’s Hayabusa2 spacecraft for insights into the early solar system and organic materials.
-
A.
Ginga
Ginga was a Japanese X-ray astronomy satellite that conducted important observations of cosmic X-ray sources in the late 1980s and early 1990s.
-
B.
25143 Itokawa
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.
-
C.
Hōshō
Hōshō was the Imperial Japanese Navy’s pioneering aircraft carrier and the world’s first purpose-built carrier to enter service.
-
D.
Yamagumo
Yamagumo was a Japanese Navy destroyer that served in World War II and was sunk during the Battle of Surigao Strait, part of the larger Battle of Leyte Gulf.
-
E.
Shimotsuki
Shimotsuki was a Japanese destroyer of the Imperial Japanese Navy that served in World War II before being sunk in late 1944.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Apollo-group asteroid
ⓘ
C-type asteroid ⓘ carbonaceous asteroid ⓘ near-Earth asteroid ⓘ potentially hazardous asteroid ⓘ small Solar System body ⓘ |
| albedo | low ⓘ |
| aphelionDistance | ~1.42 AU ⓘ |
| belongsTo | inner Solar System ⓘ |
| contains |
carbonaceous material
ⓘ
hydrated minerals ⓘ organic compounds ⓘ |
| discoverer | LINEAR NERFINISHED ⓘ |
| discoveryDate | 1999-05-10 ⓘ |
| eccentricity | ~0.19 ⓘ |
| hasLander | MASCOT NERFINISHED ⓘ |
| hasRegolith | yes ⓘ |
| hasRover |
MINERVA-II-1A
NERFINISHED
ⓘ
MINERVA-II-1B NERFINISHED ⓘ |
| impactExperimentTarget | SCI (Small Carry-on Impactor) NERFINISHED ⓘ |
| inclination | ~5.9 degrees ⓘ |
| meanDiameter | ~0.9 km ⓘ |
| minimumOrbitIntersectionDistanceWithEarth | ~0.003 AU ⓘ |
| namedAfter |
Dragon Palace
NERFINISHED
ⓘ
Ryūgū-jō NERFINISHED ⓘ |
| notableFor |
first C-type asteroid with returned samples
ⓘ
high organic and volatile content in samples ⓘ |
| orbitalPeriod | ~1.3 years ⓘ |
| parentBodyType | primitive asteroid ⓘ |
| perihelionDistance | ~0.96 AU ⓘ |
| provisionalDesignation | 1999 JU3 NERFINISHED ⓘ |
| rendezvousDate | 2018-06 ⓘ |
| riskToEarth | monitored but low ⓘ |
| rotationPeriod | ~7.63 hours ⓘ |
| sampleCollected | yes ⓘ |
| sampleLandingSite | Woomera, Australia NERFINISHED ⓘ |
| sampleReturnMission | Hayabusa2 NERFINISHED ⓘ |
| sampleReturnToEarthDate | 2020-12-06 ⓘ |
| scienceGoal |
investigate organic matter
ⓘ
study early Solar System materials ⓘ study water-bearing minerals ⓘ |
| semiMajorAxis | ~1.19 AU ⓘ |
| shape | top-shaped ⓘ |
| spectralType | Cg-type ⓘ |
| surfaceGravity | very low ⓘ |
| visitedBy | Hayabusa2 NERFINISHED ⓘ |
| visitedByAgency | JAXA 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: 162173 Ryugu Description of subject: 162173 Ryugu is a near-Earth carbonaceous asteroid studied up close and sampled by Japan’s Hayabusa2 spacecraft for insights into the early solar system and organic materials.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Hayabusa2