@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<http://astrothesaurus.org/uat/1724>
  skos:prefLabel "Two-colour diagrams"@en-GB, "Two-color diagrams"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/1224>
  skos:prefLabel "Photoelectric magnitude"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/1238>
  skos:prefLabel "Photovisual magnitude"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/1211>
  skos:prefLabel "Period determination"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/1269>
  skos:prefLabel "Pogson scale"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/923>
  skos:prefLabel "Limiting magnitude"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/1760>
  skos:prefLabel "Variable star period change"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/1228>
  skos:prefLabel "Photographic magnitude"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/999>
  skos:prefLabel "Magnitude"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/59> .

<http://astrothesaurus.org/uat/59>
  skos:altLabel "Visual magnitude"@en ;
  skos:narrower <http://astrothesaurus.org/uat/1238>, <http://astrothesaurus.org/uat/1724>, <http://astrothesaurus.org/uat/1224>, <http://astrothesaurus.org/uat/1228>, <http://astrothesaurus.org/uat/1211>, <http://astrothesaurus.org/uat/1760>, <http://astrothesaurus.org/uat/923>, <http://astrothesaurus.org/uat/1269> ;
  dc:modified "2020-11-03T18:09:53.877Z"^^xsd:dateTime, "2020-11-03T18:09:41.442Z"^^xsd:dateTime ;
  skos:definition "A measure of a star's observed brightness (opposed to absolute magnitude); symbol m. It depends on the star's intrinsic brightness, its distance from the observer, and the amount of interstellar absorption. The brightest star Sirius has an apparent magnitude of -1.46, while the weakest stars visible with the naked eye in the most favorable observation conditions have magnitudes of about +6.5. The stars of magnitudes less than +23 are measured by professional observatories, whereas those of magnitudes less than +30 by a telescope such as the Hubble Space Telescope."@en ;
  skos:broader <http://astrothesaurus.org/uat/999> ;
  skos:editorialNote [ ] ;
  a skos:Concept ;
  skos:prefLabel "Apparent magnitude"@en ;
  dc:contributor <http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie> .