Full name: anomalistic year
Plural form: years
Symbol: yr
Alternate spelling: anomalistic years
Category type: time
Scale factor: 31558432.5504
The SI base unit for time is the second.
1 second is equal to 3.1687251843163E-8 anomalistic year.
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The anomalistic year is the time taken for the Earth to complete one revolution with respect to its apsides. The orbit of the Earth is elliptical; the extreme points, called apsides, are the perihelion, where the Earth is closest to the Sun (January 3 in 2011), and the aphelion, where the Earth is farthest from the Sun (July 4 in 2011). The anomalistic year is usually defined as the time between perihelion passages. Its average duration is 365.259636 days (365 d 6 h 13 min 52.6 s) (at the epoch J2011.0).