Monoceros Loop supernova remnant
E545072
The Monoceros Loop supernova remnant is a large, faint shell of gas and dust in the constellation Monoceros, believed to be the remains of an ancient supernova explosion.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Monoceros Loop supernova remnant canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5775497 — 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: Monoceros Loop supernova remnant Context triple: [Monoceros, contains, Monoceros Loop supernova remnant]
-
A.
Barnard's Loop
Barnard's Loop is a large, faint emission nebula forming a sweeping arc across the constellation Orion, believed to be the remnant of ancient supernova activity.
-
B.
Crab Nebula
The Crab Nebula is a famous supernova remnant and pulsar wind nebula in the constellation Taurus, formed by a stellar explosion observed on Earth in 1054 AD.
-
C.
Eskimo Nebula
Eskimo Nebula is a bright planetary nebula in the constellation Gemini, notable for its distinctive, fur-lined parka appearance surrounding a central star.
-
D.
Pelican Nebula
The Pelican Nebula is a bright emission nebula in the constellation Cygnus, notable for its bird-like shape and active star-forming regions.
-
E.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
- 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: Monoceros Loop supernova remnant Target entity description: The Monoceros Loop supernova remnant is a large, faint shell of gas and dust in the constellation Monoceros, believed to be the remains of an ancient supernova explosion.
-
A.
Barnard's Loop
Barnard's Loop is a large, faint emission nebula forming a sweeping arc across the constellation Orion, believed to be the remnant of ancient supernova activity.
-
B.
Crab Nebula
The Crab Nebula is a famous supernova remnant and pulsar wind nebula in the constellation Taurus, formed by a stellar explosion observed on Earth in 1054 AD.
-
C.
Eskimo Nebula
Eskimo Nebula is a bright planetary nebula in the constellation Gemini, notable for its distinctive, fur-lined parka appearance surrounding a central star.
-
D.
Pelican Nebula
The Pelican Nebula is a bright emission nebula in the constellation Cygnus, notable for its bird-like shape and active star-forming regions.
-
E.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
supernova remnant ⓘ |
| age | on the order of 30,000 to 150,000 years ⓘ |
| angularSize | about 220 arcminutes ⓘ |
| appearance | large faint shell of gas and dust ⓘ |
| associatedWith |
Monoceros OB2 association
ⓘ
Rosette Nebula region ⓘ
linked to:
Rosette Nebula
|
| category | shell-type supernova remnant ⓘ |
| component |
expanding shell of shocked interstellar medium
ⓘ
filamentary optical structures ⓘ radio synchrotron-emitting plasma ⓘ |
| composition |
dust
ⓘ
ionized hydrogen gas ⓘ magnetized plasma ⓘ |
| constellation | Monoceros ⓘ |
| discoveredBy | radio observations in the mid-20th century ⓘ |
| distanceFromEarth |
approximately 1 kiloparsec
ⓘ
approximately 3000 light-years ⓘ |
| emissionType |
non-thermal radio emission
ⓘ
optical emission from ionized gas ⓘ |
| environment | interstellar medium of the Milky Way ⓘ |
| expansion | expanding into surrounding interstellar medium ⓘ |
| galacticLatitude | +0.5 degrees ⓘ |
| galacticLongitude | 205.5 degrees ⓘ |
| hasShape | roughly circular shell ⓘ |
| locatedIn |
Galactic disk
ⓘ
Milky Way ⓘ |
| notableFor |
large angular size on the sky
ⓘ
low surface brightness ⓘ |
| observedIn |
X-ray wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| origin | remnant of a supernova explosion ⓘ |
| otherName |
G205.5+0.5
ⓘ
Monoceros Loop ⓘ SNR G205.5+0.5 ⓘ |
| partOf | Galactic anti-center region ⓘ |
| physicalProcess |
particle acceleration
ⓘ
shock waves from supernova explosion ⓘ synchrotron radiation ⓘ |
| researchUse |
studies of cosmic ray acceleration
ⓘ
studies of supernova remnant evolution ⓘ |
| skyLocation | near the Rosette Nebula in Monoceros ⓘ |
| studiedIn |
X-ray astronomy
ⓘ
optical astronomy ⓘ radio astronomy ⓘ |
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: Monoceros Loop supernova remnant Description of subject: The Monoceros Loop supernova remnant is a large, faint shell of gas and dust in the constellation Monoceros, believed to be the remains of an ancient supernova explosion.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.