@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix wikibase: <http://wikiba.se/ontology#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix schema: <http://schema.org/> .
@prefix cc: <http://creativecommons.org/ns#> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix wd: <https://wikibase.ronzz.org/entity/> .
@prefix data: <https://wikibase.ronzz.org/wiki/Special:EntityData/> .
@prefix wds: <https://wikibase.ronzz.org/entity/statement/> .
@prefix wdref: <https://wikibase.ronzz.org/reference/> .
@prefix wdv: <https://wikibase.ronzz.org/value/> .
@prefix wdt: <https://wikibase.ronzz.org/prop/direct/> .
@prefix wdtn: <https://wikibase.ronzz.org/prop/direct-normalized/> .
@prefix p: <https://wikibase.ronzz.org/prop/> .
@prefix ps: <https://wikibase.ronzz.org/prop/statement/> .
@prefix psv: <https://wikibase.ronzz.org/prop/statement/value/> .
@prefix psn: <https://wikibase.ronzz.org/prop/statement/value-normalized/> .
@prefix pq: <https://wikibase.ronzz.org/prop/qualifier/> .
@prefix pqv: <https://wikibase.ronzz.org/prop/qualifier/value/> .
@prefix pqn: <https://wikibase.ronzz.org/prop/qualifier/value-normalized/> .
@prefix pr: <https://wikibase.ronzz.org/prop/reference/> .
@prefix prv: <https://wikibase.ronzz.org/prop/reference/value/> .
@prefix prn: <https://wikibase.ronzz.org/prop/reference/value-normalized/> .
@prefix wdno: <https://wikibase.ronzz.org/prop/novalue/> .

data:Q1557 a schema:Dataset ;
	schema:about wd:Q1557 ;
	cc:license <https://creativecommons.org/licenses/by-sa/4.0/> ;
	schema:softwareVersion "1.0.0" ;
	schema:version "6962"^^xsd:integer ;
	schema:dateModified "2026-09-03T08:07:52Z"^^xsd:dateTime ;
	wikibase:statements "10"^^xsd:integer ;
	wikibase:sitelinks "1"^^xsd:integer ;
	wikibase:identifiers "1"^^xsd:integer .

wd:Q1557 a wikibase:Item .

<https://wikibase.ronzz.org/wiki/Source:Rotational_Properties_of_21_SC_Galaxies_with_a_Large_Range_of_Luminosities_and_Radii,_from_NGC_4605_(R_%3D_4_kpc)_to_UGC_2885_(R_%3D_122_kpc)_(Scholarly_article)> a schema:Article ;
	schema:about wd:Q1557 ;
	schema:inLanguage "en" ;
	schema:isPartOf <https://wikibase.ronzz.org/> ;
	schema:name "Source:Rotational Properties of 21 SC Galaxies with a Large Range of Luminosities and Radii, from NGC 4605 (R = 4 kpc) to UGC 2885 (R = 122 kpc) (Scholarly article)"@en .

<https://wikibase.ronzz.org/> wikibase:wikiGroup "ronzz" .

wd:Q1557 wdt:P16 "10.1086/157993" ;
	wdt:P24 "471–487" ;
	wdt:P25 "238" ;
	wdt:P57 wd:Q1538 ;
	wdt:P8 "1980-01-01T00:00:00Z"^^xsd:dateTime ;
	wdt:P55 <https://ui.adsabs.harvard.edu/abs/1980ApJ...238..471R/abstract> ;
	wdt:P6 wd:Q1550,
		wd:Q1551,
		wd:Q1552 ;
	wdt:P1 wd:Q10 ;
	p:P16 wds:Q1557-26535092-1D12-4787-AA2F-00F454404E6B .

wds:Q1557-26535092-1D12-4787-AA2F-00F454404E6B a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P16 "10.1086/157993" .

wd:Q1557 p:P24 wds:Q1557-70559308-27BA-44F3-912C-88A123F54C6D .

wds:Q1557-70559308-27BA-44F3-912C-88A123F54C6D a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P24 "471–487" .

wd:Q1557 p:P25 wds:Q1557-9A9B6C74-AFBF-48E0-B24C-F490B0ACC785 .

wds:Q1557-9A9B6C74-AFBF-48E0-B24C-F490B0ACC785 a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P25 "238" .

wd:Q1557 p:P57 wds:Q1557-A7AA488A-DA89-4EDA-84A8-F11AE21E78EB .

wds:Q1557-A7AA488A-DA89-4EDA-84A8-F11AE21E78EB a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P57 wd:Q1538 .

wd:Q1557 p:P8 wds:Q1557-47258F0E-4044-4A1D-8C09-2A0A4C2B482A .

wds:Q1557-47258F0E-4044-4A1D-8C09-2A0A4C2B482A a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P8 "1980-01-01T00:00:00Z"^^xsd:dateTime ;
	psv:P8 wdv:ef979b8df4f4f2ae359ed26952114819 .

wd:Q1557 p:P55 wds:Q1557-31AA494A-1419-4846-9609-9F47767DF39C .

wds:Q1557-31AA494A-1419-4846-9609-9F47767DF39C a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P55 <https://ui.adsabs.harvard.edu/abs/1980ApJ...238..471R/abstract> .

wd:Q1557 p:P6 wds:Q1557-F94CD12D-4ECB-413A-BAE4-53DDA51BFA36 .

wds:Q1557-F94CD12D-4ECB-413A-BAE4-53DDA51BFA36 a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P6 wd:Q1550 .

wd:Q1557 p:P6 wds:Q1557-2FD8639D-A4D1-45FF-8FF7-77FBB201B75E .

wds:Q1557-2FD8639D-A4D1-45FF-8FF7-77FBB201B75E a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P6 wd:Q1551 .

wd:Q1557 p:P6 wds:Q1557-0ED10844-5CDA-4126-8FD1-D31671432D78 .

wds:Q1557-0ED10844-5CDA-4126-8FD1-D31671432D78 a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P6 wd:Q1552 .

wd:Q1557 p:P1 wds:Q1557-199E05F6-1877-4CE0-B8CC-460371DF01B6 .

wds:Q1557-199E05F6-1877-4CE0-B8CC-460371DF01B6 a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P1 wd:Q10 .

wd:Q1557 rdfs:label "Rotational Properties of 21 SC Galaxies with a Large Range of Luminosities and Radii, from NGC 4605 (R = 4 kpc) to UGC 2885 (R = 122 kpc) (Scholarly article)"@en ;
	skos:prefLabel "Rotational Properties of 21 SC Galaxies with a Large Range of Luminosities and Radii, from NGC 4605 (R = 4 kpc) to UGC 2885 (R = 122 kpc) (Scholarly article)"@en ;
	schema:name "Rotational Properties of 21 SC Galaxies with a Large Range of Luminosities and Radii, from NGC 4605 (R = 4 kpc) to UGC 2885 (R = 122 kpc) (Scholarly article)"@en ;
	schema:description "1980 paper by Vera Rubin, W. Kent Ford Jr. and Norbert Thonnard measuring optical rotation curves of 21 Sc spiral galaxies, showing they stay flat to the last measured point, far beyond where the visible light falls off — key evidence that spiral galaxies are embedded in dark matter halos"@en .

wd:P16 a wikibase:Property ;
	rdfs:label "DOI"@en ;
	skos:prefLabel "DOI"@en ;
	schema:name "DOI"@en ;
	schema:description "the DOI identifier of the work"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#ExternalId> ;
	wikibase:directClaim wdt:P16 ;
	wikibase:claim p:P16 ;
	wikibase:statementProperty ps:P16 ;
	wikibase:statementValue psv:P16 ;
	wikibase:qualifier pq:P16 ;
	wikibase:qualifierValue pqv:P16 ;
	wikibase:reference pr:P16 ;
	wikibase:referenceValue prv:P16 ;
	wikibase:novalue wdno:P16 ;
	wikibase:directClaimNormalized wdtn:P16 ;
	wikibase:statementValueNormalized psn:P16 ;
	wikibase:qualifierValueNormalized pqn:P16 ;
	wikibase:referenceValueNormalized prn:P16 .

p:P16 a owl:ObjectProperty .

psv:P16 a owl:ObjectProperty .

pqv:P16 a owl:ObjectProperty .

prv:P16 a owl:ObjectProperty .

wdt:P16 a owl:DatatypeProperty .

ps:P16 a owl:DatatypeProperty .

pq:P16 a owl:DatatypeProperty .

pr:P16 a owl:DatatypeProperty .

psn:P16 a owl:ObjectProperty .

pqn:P16 a owl:ObjectProperty .

prn:P16 a owl:ObjectProperty .

wdtn:P16 a owl:ObjectProperty .

wdno:P16 a owl:Class ;
	owl:complementOf _:66792a792d1c7f1fe01837b498cdf4ec .

_:66792a792d1c7f1fe01837b498cdf4ec a owl:Restriction ;
	owl:onProperty wdt:P16 ;
	owl:someValuesFrom owl:Thing .

wd:P24 a wikibase:Property ;
	rdfs:label "page(s)"@en ;
	skos:prefLabel "page(s)"@en ;
	schema:name "page(s)"@en ;
	schema:description "the pages of the work within its source"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#String> ;
	wikibase:directClaim wdt:P24 ;
	wikibase:claim p:P24 ;
	wikibase:statementProperty ps:P24 ;
	wikibase:statementValue psv:P24 ;
	wikibase:qualifier pq:P24 ;
	wikibase:qualifierValue pqv:P24 ;
	wikibase:reference pr:P24 ;
	wikibase:referenceValue prv:P24 ;
	wikibase:novalue wdno:P24 .

p:P24 a owl:ObjectProperty .

psv:P24 a owl:ObjectProperty .

pqv:P24 a owl:ObjectProperty .

prv:P24 a owl:ObjectProperty .

wdt:P24 a owl:DatatypeProperty .

ps:P24 a owl:DatatypeProperty .

pq:P24 a owl:DatatypeProperty .

pr:P24 a owl:DatatypeProperty .

wdno:P24 a owl:Class ;
	owl:complementOf _:8eb377f6ea0003a752c5e3eacaf673aa .

_:8eb377f6ea0003a752c5e3eacaf673aa a owl:Restriction ;
	owl:onProperty wdt:P24 ;
	owl:someValuesFrom owl:Thing .

wd:P25 a wikibase:Property ;
	rdfs:label "volume"@en ;
	skos:prefLabel "volume"@en ;
	schema:name "volume"@en ;
	schema:description "the volume of the work in its series"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#String> ;
	wikibase:directClaim wdt:P25 ;
	wikibase:claim p:P25 ;
	wikibase:statementProperty ps:P25 ;
	wikibase:statementValue psv:P25 ;
	wikibase:qualifier pq:P25 ;
	wikibase:qualifierValue pqv:P25 ;
	wikibase:reference pr:P25 ;
	wikibase:referenceValue prv:P25 ;
	wikibase:novalue wdno:P25 .

p:P25 a owl:ObjectProperty .

psv:P25 a owl:ObjectProperty .

pqv:P25 a owl:ObjectProperty .

prv:P25 a owl:ObjectProperty .

wdt:P25 a owl:DatatypeProperty .

ps:P25 a owl:DatatypeProperty .

pq:P25 a owl:DatatypeProperty .

pr:P25 a owl:DatatypeProperty .

wdno:P25 a owl:Class ;
	owl:complementOf _:3fcaae71d51b0adc59abd10ddd5ef99d .

_:3fcaae71d51b0adc59abd10ddd5ef99d a owl:Restriction ;
	owl:onProperty wdt:P25 ;
	owl:someValuesFrom owl:Thing .

wd:Q1538 a wikibase:Item ;
	rdfs:label "The Astrophysical Journal"@en ;
	skos:prefLabel "The Astrophysical Journal"@en ;
	schema:name "The Astrophysical Journal"@en ;
	schema:description "Peer-reviewed scientific journal of astrophysics and astronomy, published by the American Astronomical Society; carried the 1999 Perlmutter et al. paper reporting a positive cosmological constant"@en .

wd:P57 a wikibase:Property ;
	rdfs:label "journal (entity)"@en ;
	skos:prefLabel "journal (entity)"@en ;
	schema:name "journal (entity)"@en ;
	schema:description "the journal or periodical the work appeared in, as an entity"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#WikibaseItem> ;
	wikibase:directClaim wdt:P57 ;
	wikibase:claim p:P57 ;
	wikibase:statementProperty ps:P57 ;
	wikibase:statementValue psv:P57 ;
	wikibase:qualifier pq:P57 ;
	wikibase:qualifierValue pqv:P57 ;
	wikibase:reference pr:P57 ;
	wikibase:referenceValue prv:P57 ;
	wikibase:novalue wdno:P57 .

p:P57 a owl:ObjectProperty .

psv:P57 a owl:ObjectProperty .

pqv:P57 a owl:ObjectProperty .

prv:P57 a owl:ObjectProperty .

wdt:P57 a owl:ObjectProperty .

ps:P57 a owl:ObjectProperty .

pq:P57 a owl:ObjectProperty .

pr:P57 a owl:ObjectProperty .

wdno:P57 a owl:Class ;
	owl:complementOf _:7db196d9e14f72040ea54ca3ddddffa8 .

_:7db196d9e14f72040ea54ca3ddddffa8 a owl:Restriction ;
	owl:onProperty wdt:P57 ;
	owl:someValuesFrom owl:Thing .

wd:P8 a wikibase:Property ;
	rdfs:label "date"@en ;
	skos:prefLabel "date"@en ;
	schema:name "date"@en ;
	schema:description "the date of this item (publication or creation)"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#Time> ;
	wikibase:directClaim wdt:P8 ;
	wikibase:claim p:P8 ;
	wikibase:statementProperty ps:P8 ;
	wikibase:statementValue psv:P8 ;
	wikibase:qualifier pq:P8 ;
	wikibase:qualifierValue pqv:P8 ;
	wikibase:reference pr:P8 ;
	wikibase:referenceValue prv:P8 ;
	wikibase:novalue wdno:P8 .

p:P8 a owl:ObjectProperty .

psv:P8 a owl:ObjectProperty .

pqv:P8 a owl:ObjectProperty .

prv:P8 a owl:ObjectProperty .

wdt:P8 a owl:DatatypeProperty .

ps:P8 a owl:DatatypeProperty .

pq:P8 a owl:DatatypeProperty .

pr:P8 a owl:DatatypeProperty .

wdno:P8 a owl:Class ;
	owl:complementOf _:acffe14ef7de306a5f3d8961fa66b097 .

_:acffe14ef7de306a5f3d8961fa66b097 a owl:Restriction ;
	owl:onProperty wdt:P8 ;
	owl:someValuesFrom owl:Thing .

wd:P55 a wikibase:Property ;
	rdfs:label "access URL"@en ;
	skos:prefLabel "access URL"@en ;
	schema:name "access URL"@en ;
	schema:description "the URL where this work can be accessed (landing page, not necessarily the file)"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#Url> ;
	wikibase:directClaim wdt:P55 ;
	wikibase:claim p:P55 ;
	wikibase:statementProperty ps:P55 ;
	wikibase:statementValue psv:P55 ;
	wikibase:qualifier pq:P55 ;
	wikibase:qualifierValue pqv:P55 ;
	wikibase:reference pr:P55 ;
	wikibase:referenceValue prv:P55 ;
	wikibase:novalue wdno:P55 .

p:P55 a owl:ObjectProperty .

psv:P55 a owl:ObjectProperty .

pqv:P55 a owl:ObjectProperty .

prv:P55 a owl:ObjectProperty .

wdt:P55 a owl:ObjectProperty .

ps:P55 a owl:ObjectProperty .

pq:P55 a owl:ObjectProperty .

pr:P55 a owl:ObjectProperty .

wdno:P55 a owl:Class ;
	owl:complementOf _:6ad0014a69d2420c192e41933e1287ac .

_:6ad0014a69d2420c192e41933e1287ac a owl:Restriction ;
	owl:onProperty wdt:P55 ;
	owl:someValuesFrom owl:Thing .

wd:Q1550 a wikibase:Item ;
	rdfs:label "Vera Rubin"@en ;
	skos:prefLabel "Vera Rubin"@en ;
	schema:name "Vera Rubin"@en ;
	schema:description "American astronomer (1928–2016) whose measurements of the rotation curves of spiral galaxies, made with W. Kent Ford Jr., provided key evidence for dark matter"@en .

wd:P6 a wikibase:Property ;
	rdfs:label "attributed to"@en ;
	skos:prefLabel "attributed to"@en ;
	schema:name "attributed to"@en ;
	schema:description "the author or creator this item is attributed to"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#WikibaseItem> ;
	wikibase:directClaim wdt:P6 ;
	wikibase:claim p:P6 ;
	wikibase:statementProperty ps:P6 ;
	wikibase:statementValue psv:P6 ;
	wikibase:qualifier pq:P6 ;
	wikibase:qualifierValue pqv:P6 ;
	wikibase:reference pr:P6 ;
	wikibase:referenceValue prv:P6 ;
	wikibase:novalue wdno:P6 .

p:P6 a owl:ObjectProperty .

psv:P6 a owl:ObjectProperty .

pqv:P6 a owl:ObjectProperty .

prv:P6 a owl:ObjectProperty .

wdt:P6 a owl:ObjectProperty .

ps:P6 a owl:ObjectProperty .

pq:P6 a owl:ObjectProperty .

pr:P6 a owl:ObjectProperty .

wdno:P6 a owl:Class ;
	owl:complementOf _:756f10bc5f45e99cc0b50f82c4769b77 .

_:756f10bc5f45e99cc0b50f82c4769b77 a owl:Restriction ;
	owl:onProperty wdt:P6 ;
	owl:someValuesFrom owl:Thing .

wd:Q1551 a wikibase:Item ;
	rdfs:label "W. Kent Ford"@en ;
	skos:prefLabel "W. Kent Ford"@en ;
	schema:name "W. Kent Ford"@en ;
	schema:description "American astronomer who collaborated with Vera Rubin at the Carnegie Institution's Department of Terrestrial Magnetism on measurements of spiral galaxy rotation curves"@en .

wd:Q1552 a wikibase:Item ;
	rdfs:label "Norbert Thonnard"@en ;
	skos:prefLabel "Norbert Thonnard"@en ;
	schema:name "Norbert Thonnard"@en ;
	schema:description "American astronomer, co-author with Vera Rubin and W. Kent Ford Jr. of the 1980 study of rotation curves of 21 Sc galaxies"@en .

wd:Q10 a wikibase:Item ;
	rdfs:label "scholarly article"@en ;
	skos:prefLabel "scholarly article"@en ;
	schema:name "scholarly article"@en ;
	schema:description "a peer-reviewed article in a scholarly periodical"@en .

wd:P1 a wikibase:Property ;
	rdfs:label "instance of"@en ;
	skos:prefLabel "instance of"@en ;
	schema:name "instance of"@en ;
	schema:description "that class of which this subject is a particular example and member"@en ;
	wikibase:propertyType <http://wikiba.se/ontology#WikibaseItem> ;
	wikibase:directClaim wdt:P1 ;
	wikibase:claim p:P1 ;
	wikibase:statementProperty ps:P1 ;
	wikibase:statementValue psv:P1 ;
	wikibase:qualifier pq:P1 ;
	wikibase:qualifierValue pqv:P1 ;
	wikibase:reference pr:P1 ;
	wikibase:referenceValue prv:P1 ;
	wikibase:novalue wdno:P1 .

p:P1 a owl:ObjectProperty .

psv:P1 a owl:ObjectProperty .

pqv:P1 a owl:ObjectProperty .

prv:P1 a owl:ObjectProperty .

wdt:P1 a owl:ObjectProperty .

ps:P1 a owl:ObjectProperty .

pq:P1 a owl:ObjectProperty .

pr:P1 a owl:ObjectProperty .

wdno:P1 a owl:Class ;
	owl:complementOf _:b96ec5135b6832e1d84209d72460276b .

_:b96ec5135b6832e1d84209d72460276b a owl:Restriction ;
	owl:onProperty wdt:P1 ;
	owl:someValuesFrom owl:Thing .

wdv:ef979b8df4f4f2ae359ed26952114819 a wikibase:TimeValue ;
	wikibase:timeValue "1980-01-01T00:00:00Z"^^xsd:dateTime ;
	wikibase:timePrecision "9"^^xsd:integer ;
	wikibase:timeTimezone "0"^^xsd:integer ;
	wikibase:timeCalendarModel <http://www.wikidata.org/entity/Q1985727> .