90482 Orcus
E313698
Kuiper Belt object
dwarf planet candidate
minor planet
natural satellite
plutino
resonant trans-Neptunian object
trans-Neptunian object
90482 Orcus is a large trans-Neptunian object and plutino in the Kuiper Belt, often considered a dwarf-planet candidate and notable for its moon Vanth.
All labels observed (3)
| Label | Occurrences |
|---|---|
| 90482 Orcus canonical | 7 |
| (90482) Orcus | 4 |
| (90482) Orcus I Vanth | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2962718 — 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: 90482 Orcus Context triple: [Orcus, hasNumberDesignation, 90482 Orcus]
-
A.
Quaoar
Quaoar is a large, distant trans-Neptunian object in the Kuiper Belt, notable for its nearly circular orbit and for having a small moon named Weywot.
-
B.
Makemake
Makemake is a large, icy dwarf planet in the Kuiper Belt, known for its extremely cold surface and status as one of the most massive objects beyond Neptune.
-
C.
Eris
Eris is a distant, icy dwarf planet in the outer reaches of the Solar System, notable for its size comparable to Pluto and its role in prompting the redefinition of planetary status.
-
D.
Eris
Eris is the Greek goddess of strife and discord, often depicted as a malevolent force sowing conflict among gods and mortals.
-
E.
Haumea
Haumea is an elongated, fast-spinning dwarf planet in the Kuiper Belt notable for its rapid rotation, ring system, and two known moons.
- 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: 90482 Orcus Target entity description: 90482 Orcus is a large trans-Neptunian object and plutino in the Kuiper Belt, often considered a dwarf-planet candidate and notable for its moon Vanth.
-
A.
Quaoar
Quaoar is a large, distant trans-Neptunian object in the Kuiper Belt, notable for its nearly circular orbit and for having a small moon named Weywot.
-
B.
Makemake
Makemake is a large, icy dwarf planet in the Kuiper Belt, known for its extremely cold surface and status as one of the most massive objects beyond Neptune.
-
C.
Eris
Eris is a distant, icy dwarf planet in the outer reaches of the Solar System, notable for its size comparable to Pluto and its role in prompting the redefinition of planetary status.
-
D.
Eris
Eris is the Greek goddess of strife and discord, often depicted as a malevolent force sowing conflict among gods and mortals.
-
E.
Haumea
Haumea is an elongated, fast-spinning dwarf planet in the Kuiper Belt notable for its rapid rotation, ring system, and two known moons.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Kuiper Belt object
ⓘ
dwarf planet candidate ⓘ minor planet ⓘ natural satellite ⓘ plutino ⓘ resonant trans-Neptunian object ⓘ trans-Neptunian object ⓘ |
| absoluteMagnitude | 2.3 ⓘ |
| aphelionDistance | approximately 48.1 AU ⓘ |
| belongsToDynamicalGroup | plutinos ⓘ |
| catalogCode |
(90482) Orcus
ⓘ
linked to:
90482 Orcus
|
| classificationStatus | dwarf planet candidate ⓘ |
| discoveredBy |
Chad Trujillo
ⓘ
David Rabinowitz ⓘ
linked to:
David L. Rabinowitz
Michael E. Brown ⓘ |
| discoveryDate |
2004-02-17
ⓘ
2005-11-13 ⓘ |
| discoverySite | Palomar Observatory ⓘ |
| eclipticLongitudeAtDiscovery | in constellation Hydra ⓘ |
| estimatedMass | approximately 6.4×10^20 kg ⓘ |
| geometricAlbedo | approximately 0.23 ⓘ |
| hasAlternativeName | Orcus ⓘ |
| hasMinorPlanetNumber | 90482 ⓘ |
| hasSatellite | Vanth ⓘ |
| meanDiameter |
approximately 440 km
ⓘ
approximately 910 km ⓘ |
| memberOf | Kuiper Belt ⓘ |
| namedAfter | Orcus ⓘ |
| orbitalEccentricity | approximately 0.227 ⓘ |
| orbitalInclination | approximately 20.6 degrees ⓘ |
| orbitalPeriod |
approximately 247 years
ⓘ
approximately 9.54 days ⓘ |
| orbitalResonanceRatio | 2:3 ⓘ |
| orbitalResonanceWith | Neptune ⓘ |
| orbits |
90482 Orcus
ⓘ
Sun ⓘ |
| perihelionDistance | approximately 30.3 AU ⓘ |
| provisionalDesignation | 2004 DW ⓘ |
| rotationPeriod | approximately 10.5 hours ⓘ |
| satelliteSystem | binary-like system with Vanth ⓘ |
| semiMajorAxis | approximately 39.2 AU ⓘ |
| similarDynamicalClassTo | Pluto ⓘ |
| spectralType | neutral to slightly red ⓘ |
| surfaceComposition |
possible ammonia or ammonium compounds
ⓘ
water ice ⓘ |
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: 90482 Orcus Description of subject: 90482 Orcus is a large trans-Neptunian object and plutino in the Kuiper Belt, often considered a dwarf-planet candidate and notable for its moon Vanth.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: 90482 Orcus
subject linked to:
90482 Orcus
linked to: 90482 Orcus
linked to: 90482 Orcus
subject linked to:
90482 Orcus (2004 DW)
linked to: 90482 Orcus
subject linked to:
Orcus–Vanth system
subject linked to:
Orcus–Vanth system
subject linked to:
dwarf planet Orcus
linked to: 90482 Orcus