IC II (second Index Catalogue)

E521867

astronomical catalogue supplementary catalogue

IC II (second Index Catalogue) is an astronomical catalog published as a supplement to the New General Catalogue, listing additional nebulae, star clusters, and galaxies discovered in the late 19th and early 20th centuries.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
Second Index Catalogue (IC II)	2
IC II (second Index Catalogue) canonical	1
Index Catalogue (IC I and IC II)	1
Index Catalogue II	1
Second Index Catalogue	1

How this entity was disambiguated

This entity first appeared as the object of triple T5469883 — 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 II (second Index Catalogue)
Context triple: [IC 1848, includedIn, IC II (second Index Catalogue)]

A. New General Catalogue
The New General Catalogue is a comprehensive 19th-century astronomical catalog of deep-sky objects, including galaxies, nebulae, and star clusters, that remains widely used by astronomers today.
B. Caldwell catalogue
The Caldwell catalogue is an astronomical list of 109 bright star clusters, nebulae, and galaxies compiled by Patrick Moore as a complement to the Messier catalogue, intended for observation by amateur astronomers.
C. Armagh Catalogue of Stars
The Armagh Catalogue of Stars is a 19th-century astronomical star catalog compiled at Armagh Observatory, listing precise positions and related data for thousands of stars.
D. IC 2163
IC 2163 is a disturbed spiral galaxy interacting with the nearby galaxy NGC 2207, located in the constellation Canis Major.
E. 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.
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 II (second Index Catalogue)
Target entity description: IC II (second Index Catalogue) is an astronomical catalog published as a supplement to the New General Catalogue, listing additional nebulae, star clusters, and galaxies discovered in the late 19th and early 20th centuries.

A. New General Catalogue
The New General Catalogue is a comprehensive 19th-century astronomical catalog of deep-sky objects, including galaxies, nebulae, and star clusters, that remains widely used by astronomers today.
B. Caldwell catalogue
The Caldwell catalogue is an astronomical list of 109 bright star clusters, nebulae, and galaxies compiled by Patrick Moore as a complement to the Messier catalogue, intended for observation by amateur astronomers.
C. Armagh Catalogue of Stars
The Armagh Catalogue of Stars is a 19th-century astronomical star catalog compiled at Armagh Observatory, listing precise positions and related data for thousands of stars.
D. IC 2163
IC 2163 is a disturbed spiral galaxy interacting with the nearby galaxy NGC 2207, located in the constellation Canis Major.
E. 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.
F. None of above. chosen

Statements (45)

Predicate	Object
instanceOf	astronomical catalogue ⓘ supplementary catalogue ⓘ
alternativeName	Second Index Catalogue ⓘ linked to: IC II (second Index Catalogue)
catalogueFamily	NGC/IC system ⓘ linked to: NGC
catalogues	additional objects not in the original NGC ⓘ
contains	IC 10 ⓘ IC 1274 ⓘ IC 1396 ⓘ linked to: IC 1396 H II region IC 1613 ⓘ IC 1805 ⓘ IC 1848 ⓘ IC 2177 ⓘ IC 2944 ⓘ IC 342 ⓘ IC 405 ⓘ IC 418 ⓘ IC 434 ⓘ linked to: IC 434 emission nebula IC 443 ⓘ IC 5067 ⓘ linked to: IC 5070 IC 5070 ⓘ IC 5146 ⓘ IC 5148 ⓘ
coordinateSystem	equatorial coordinates ⓘ
epochOfDiscoveries	early 20th century ⓘ late 19th century ⓘ
field	astronomy ⓘ
follows	IC I ⓘ
hasDataOn	positions of objects ⓘ visual descriptions of objects ⓘ
isRelatedTo	Index Catalogue (IC I and IC II) ⓘ linked to: IC II (second Index Catalogue) New General Catalogue ⓘ
isSupplementTo	NGC (New General Catalogue of Nebulae and Clusters of Stars) ⓘ linked to: New General Catalogue New General Catalogue ⓘ
isUsedBy	amateur astronomers ⓘ professional astronomers ⓘ
isUsedFor	historical research on discoveries of nebulae and clusters ⓘ identification of deep-sky objects ⓘ
language	English ⓘ
lists	galaxies ⓘ nebulae ⓘ star clusters ⓘ
objectType	deep-sky objects ⓘ
partOf	Index Catalogue ⓘ
shortName	IC 2 ⓘ
usesDesignationPrefix	IC ⓘ

How these facts were elicited

Referenced by (6)

Full triples — surface form annotated when it differs from this entity's canonical label.

IC 1848 → includedIn → IC II (second Index Catalogue) ⓘ

subject linked to: IC 1848 (Soul Nebula)

Index Catalogue → hasPart → Index Catalogue II ⓘ