de Vaucouleurs system of galaxy classification

E902178

astronomical classification scheme galaxy morphological classification system

The de Vaucouleurs system of galaxy classification is an extended and more detailed refinement of the Hubble scheme that categorizes galaxies using a three-dimensional notation incorporating features such as bars, rings, and spiral arm structure.

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

All labels observed (6)

Label	Occurrences
de Vaucouleurs revised Hubble system	2
RC3 galaxy catalog classifications	1
de Vaucouleurs classification system	1
de Vaucouleurs morphological classification of galaxies	1
de Vaucouleurs revised Hubble–Sandage system	1
de Vaucouleurs system of galaxy classification canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T11078401 — 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: de Vaucouleurs system of galaxy classification
Context triple: [Hubble sequence of galaxy classification, inspired, de Vaucouleurs system of galaxy classification]

A. Hubble sequence of galaxy classification
The Hubble sequence of galaxy classification is a morphological system that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
B. Hubble sequence
The Hubble sequence is a morphological classification scheme that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
C. Zwicky catalog of galaxies
The Zwicky catalog of galaxies is an influential astronomical catalog compiled by Swiss astronomer Fritz Zwicky that systematically lists and classifies thousands of galaxies and galaxy clusters.
D. Revised Shapley–Ames Catalog of Bright Galaxies
The Revised Shapley–Ames Catalog of Bright Galaxies is a major astronomical catalog that systematically lists and classifies the brightest galaxies in the sky, serving as a foundational reference for extragalactic research.
E. Principal Galaxies Catalogue
The Principal Galaxies Catalogue is a comprehensive astronomical catalog that compiles detailed data and standardized designations for thousands of known 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: de Vaucouleurs system of galaxy classification
Target entity description: The de Vaucouleurs system of galaxy classification is an extended and more detailed refinement of the Hubble scheme that categorizes galaxies using a three-dimensional notation incorporating features such as bars, rings, and spiral arm structure.

A. Hubble sequence of galaxy classification
The Hubble sequence of galaxy classification is a morphological system that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
B. Hubble sequence
The Hubble sequence is a morphological classification scheme that organizes galaxies into categories such as ellipticals, spirals, and irregulars based on their visual appearance.
C. Zwicky catalog of galaxies
The Zwicky catalog of galaxies is an influential astronomical catalog compiled by Swiss astronomer Fritz Zwicky that systematically lists and classifies thousands of galaxies and galaxy clusters.
D. Revised Shapley–Ames Catalog of Bright Galaxies
The Revised Shapley–Ames Catalog of Bright Galaxies is a major astronomical catalog that systematically lists and classifies the brightest galaxies in the sky, serving as a foundational reference for extragalactic research.
E. Principal Galaxies Catalogue
The Principal Galaxies Catalogue is a comprehensive astronomical catalog that compiles detailed data and standardized designations for thousands of known galaxies.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	astronomical classification scheme ⓘ galaxy morphological classification system ⓘ
alsoKnownAs	de Vaucouleurs revised Hubble system ⓘ linked to: de Vaucouleurs system of galaxy classification de Vaucouleurs revised Hubble–Sandage system ⓘ linked to: de Vaucouleurs system of galaxy classification
basedOn	Hubble sequence ⓘ
capturesFeature	inner rings ⓘ outer rings ⓘ pseudo-rings ⓘ
classifiesBy	bulge-to-disk ratio ⓘ degree of arm winding ⓘ lens components ⓘ presence of bar ⓘ ring structures ⓘ spiral arm structure ⓘ
developedBy	Gérard de Vaucouleurs ⓘ linked to: A. G. de Vaucouleurs
dimensionIncludes	family ⓘ stage ⓘ variety ⓘ
distinguishes	strongly barred spirals ⓘ unbarred spirals ⓘ weakly barred spirals ⓘ
extends	Hubble tuning fork diagram ⓘ linked to: Hubble sequence of galaxy classification
field	extragalactic astronomy ⓘ galaxy morphology ⓘ
goal	provide more detailed description of galaxy morphology ⓘ
includes	barred spiral galaxies ⓘ elliptical galaxies ⓘ irregular galaxies ⓘ lenticular galaxies ⓘ spiral galaxies ⓘ
influenced	RC2 galaxy catalog classifications ⓘ RC3 galaxy catalog classifications ⓘ linked to: de Vaucouleurs system of galaxy classification
introducedIn	mid-20th century ⓘ
namedAfter	Gérard de Vaucouleurs ⓘ linked to: A. G. de Vaucouleurs
notationExample	(r) ⓘ (rs) ⓘ (s) ⓘ SA ⓘ SAB ⓘ SB ⓘ a ⓘ b ⓘ c ⓘ d ⓘ e ⓘ
refines	Hubble galaxy classification scheme ⓘ linked to: Hubble sequence of galaxy classification
supports	continuous sequence of galaxy types ⓘ
usedIn	cataloging nearby galaxies ⓘ
uses	three-dimensional notation ⓘ

How these facts were elicited

Referenced by (7)

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

Hubble sequence of galaxy classification → inspired → de Vaucouleurs system of galaxy classification ⓘ

A. G. de Vaucouleurs → knownFor → de Vaucouleurs classification system ⓘ