Full name: draconic year
Plural form: years
Symbol: yr
Alternate spelling: draconic years
Category type: time
Scale factor: 29947974.556291
The SI base unit for time is the second.
1 second is equal to 3.3391239802223E-8 draconic year.
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The draconic year, draconitic year, eclipse year, or ecliptic year is the time taken for the Sun (as seen from the Earth) to complete one revolution with respect to the same lunar node (a point where the Moon's orbit intersects the ecliptic). This period is associated with eclipses: these occur only when both the Sun and the Moon are near these nodes; so eclipses occur within about a month of every half eclipse year. Hence there are two eclipse seasons every eclipse year. The average duration of the eclipse year is 346.620075883 days (346 d 14 h 52 min 54 s) (at the epoch J2000.0).