15296687-n 'an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded';
 
Chinese (simplified) 历元
English epoch , date of reference
Italian epoca
Japanese 元期
Definitions
Japanese
情報（天体の座標などの）が記録される時間における任意の一定である日付
English
an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
Relations
Hypernym: date
Domain–Category: astronomy
Semantic Field: timen
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Maintainer: Francis Bond <bond@ieee.org>