unit:YR_TROPICAL

URI: http://qudt.org/vocab/unit/YR_TROPICAL

Type
Description

A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronised with the position of the Earth in its orbit around the Sun. As a consequence, the tropical year is about 20 minutes shorter than the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars. Since antiquity, astronomers have progressively refined the definition of the tropical year, and currently define it as the time required for the mean Sun's tropical longitude (longitudinal position along the ecliptic relative to its position at the vernal equinox) to increase by 360 degrees (that is, to complete one full seasonal circuit).

Properties
qudt:iec61360Code
0112/2///62720#UAB029
qudt:symbol
yr{tropical}
Annotations
skos:altLabel
solar year
dcterms:description

A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronised with the position of the Earth in its orbit around the Sun. As a consequence, the tropical year is about 20 minutes shorter than the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars. Since antiquity, astronomers have progressively refined the definition of the tropical year, and currently define it as the time required for the mean Sun's tropical longitude (longitudinal position along the ecliptic relative to its position at the vernal equinox) to increase by 360 degrees (that is, to complete one full seasonal circuit).

rdfs:label
Tropical Year(en)
View as:  CSV

Work in progress

RDF/XML
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    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="http://qudt.org/vocab/unit/YR_TROPICAL">
    <j.0:symbol>yr{tropical}</j.0:symbol>
    <j.0:conversionMultiplier rdf:datatype="http://www.w3.org/2001/XMLSchema#decimal">31556925.216</j.0:conversionMultiplier>
    <j.0:exactMatch rdf:resource="http://qudt.org/vocab/unit/YR_TROPICAL"/>
    <j.1:description rdf:datatype="http://www.w3.org/1999/02/22-rdf-syntax-ns#HTML">&lt;p&gt;A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronised with the position of the Earth in its orbit around the Sun. As a consequence, the tropical year is about 20 minutes shorter than the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars. Since antiquity, astronomers have progressively refined the definition of the tropical year, and currently define it as the time required for the mean Sun's tropical longitude (longitudinal position along the ecliptic relative to its position at the vernal equinox) to increase by 360 degrees (that is, to complete one full seasonal circuit).&lt;/p&gt;</j.1:description>
    <j.0:hasQuantityKind rdf:resource="http://qudt.org/vocab/quantitykind/Time"/>
    <j.2:altLabel>solar year</j.2:altLabel>
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    <j.0:iec61360Code>0112/2///62720#UAB029</j.0:iec61360Code>
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    <j.0:ucumCode rdf:datatype="http://qudt.org/schema/qudt/UCUMcs">a_t</j.0:ucumCode>
    <rdfs:label xml:lang="en">Tropical Year</rdfs:label>
  </rdf:Description>
</rdf:RDF>
TURTLE
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<http://qudt.org/vocab/unit/YR_TROPICAL>
  rdf:type <http://qudt.org/schema/qudt/Unit> ;
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  <http://qudt.org/schema/qudt/iec61360Code> "0112/2///62720#UAB029" ;
  <http://qudt.org/schema/qudt/symbol> "yr{tropical}" ;
  <http://qudt.org/schema/qudt/ucumCode> "a_t"^^<http://qudt.org/schema/qudt/UCUMcs> ;
  <http://qudt.org/schema/qudt/uneceCommonCode> "D42" ;
  rdfs:isDefinedBy <http://qudt.org/2.1/vocab/unit> ;
  rdfs:label "Tropical Year"@en ;
  <http://www.w3.org/2004/02/skos/core#altLabel> "solar year" ;
.
JSON
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    ,"conversion multiplier":"31556925.216" 
    ,"description":"&lt;p&gt;A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronised with the position of the Earth in its orbit around the Sun. As a consequence, the tropical year is about 20 minutes shorter than the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars. Since antiquity, astronomers have progressively refined the definition of the tropical year, and currently define it as the time required for the mean Sun's tropical longitude (longitudinal position along the ecliptic relative to its position at the vernal equinox) to increase by 360 degrees (that is, to complete one full seasonal circuit).&lt;\/p&gt;" 
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    ,"label":"Tropical Year" 
    ,"symbol":"yr{tropical}" 
    ,"type":"qudt:Unit" 
    ,"ucum code":"a_t" 
    ,"unece common code":"D42" 
    ]}
JSON-LD
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