bn:16867307n
Noun Concept
AR
No term available
EN
Conventional fixed unit of time, derived of the SI system, equal to the mean duration of the tropic year independantly of the geographic location, estimated to 365.2422 fixed days of 86400 seconds, near from the mean year observed on ground Wikidata
Relations
Sources
HAS INSTANCE
DIFFERENT FROM
MEASURED PHYSICAL QUANTITY