IC 2177
E545071
IC 2177, commonly known as the Seagull Nebula, is a large, diffuse emission nebula located on the border of the constellations Monoceros and Canis Major.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IC 2177 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T5775496 — 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: IC 2177 Context triple: [Monoceros, contains, IC 2177]
-
A.
IC 2574
IC 2574 is a dwarf irregular galaxy in the constellation Ursa Major, notable for its active star formation and membership in the nearby M81 Group of galaxies.
-
B.
IC 2163
IC 2163 is a disturbed spiral galaxy interacting with the nearby galaxy NGC 2207, located in the constellation Canis Major.
-
C.
IC 4725
IC 4725 is an open star cluster in the constellation Sagittarius, better known as Messier 25, visible with binoculars or small telescopes.
-
D.
IC 1805
IC 1805 is a large emission nebula and active star-forming region in the constellation Cassiopeia, notable for its heart-shaped appearance and young, massive star cluster.
-
E.
IC 1613
IC 1613 is a dwarf irregular galaxy in the constellation Cetus and a member of the Local Group, notable for its low dust content and use in calibrating the cosmic distance scale.
- 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: IC 2177 Target entity description: IC 2177, commonly known as the Seagull Nebula, is a large, diffuse emission nebula located on the border of the constellations Monoceros and Canis Major.
-
A.
IC 2574
IC 2574 is a dwarf irregular galaxy in the constellation Ursa Major, notable for its active star formation and membership in the nearby M81 Group of galaxies.
-
B.
IC 2163
IC 2163 is a disturbed spiral galaxy interacting with the nearby galaxy NGC 2207, located in the constellation Canis Major.
-
C.
IC 4725
IC 4725 is an open star cluster in the constellation Sagittarius, better known as Messier 25, visible with binoculars or small telescopes.
-
D.
IC 1805
IC 1805 is a large emission nebula and active star-forming region in the constellation Cassiopeia, notable for its heart-shaped appearance and young, massive star cluster.
-
E.
IC 1613
IC 1613 is a dwarf irregular galaxy in the constellation Cetus and a member of the Local Group, notable for its low dust content and use in calibrating the cosmic distance scale.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
diffuse nebula ⓘ emission nebula ⓘ |
| alsoKnownAs | Seagull Nebula ⓘ |
| angularSize | approximately 2.5 degrees ⓘ |
| apparentMagnitude | approximately 15 ⓘ |
| associatedWith | star-forming regions ⓘ |
| belongsTo |
Orion Arm of the Milky Way
ⓘ
linked to:
Orion Arm
|
| bestSeenFrom | dark-sky sites ⓘ |
| bestSeenIn | winter months ⓘ |
| catalog | Index Catalogue ⓘ |
| celestialHemisphere | southern celestial hemisphere ⓘ |
| contains |
dark nebulae
ⓘ
embedded protostars ⓘ interstellar dust ⓘ molecular gas ⓘ open star clusters ⓘ reflection nebulae ⓘ young stellar objects ⓘ |
| declination | approximately −10° 27′ ⓘ |
| discoveredInCatalogue | Index Catalogue of Nebulae and Clusters of Stars ⓘ |
| distanceFromEarth |
approximately 1.1 kiloparsecs
ⓘ
approximately 3700 light-years ⓘ |
| dominantEmissionLine | hydrogen-alpha ⓘ |
| emits | hydrogen recombination lines ⓘ |
| galacticEnvironment | outer Galaxy ⓘ |
| ionizationSource | nearby hot stars ⓘ |
| isRegionOf | active star formation ⓘ |
| liesOnBorderOf |
Canis Major
ⓘ
Monoceros ⓘ |
| locatedIn | Galactic plane ⓘ |
| locatedInConstellation |
Canis Major
ⓘ
Monoceros ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOf | Milky Way ⓘ |
| photographedBy |
amateur astronomers
ⓘ
professional observatories ⓘ |
| rightAscension | approximately 07h 04m ⓘ |
| shapeResembles | a flying seagull ⓘ |
| spectralTypeOfExcitingStars |
B-type
ⓘ
O-type ⓘ |
| visibleFrom |
low northern latitudes
ⓘ
southern latitudes ⓘ |
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: IC 2177 Description of subject: IC 2177, commonly known as the Seagull Nebula, is a large, diffuse emission nebula located on the border of the constellations Monoceros and Canis Major.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
IC II (second Index Catalogue)