Julian ephemeris century

Julian ephemeris century

[′jül·yən ə′fem·ə·rəs ′sen·chə·rē]
(astronomy)
The unit of ephemeris time (ET) in Simon Newcomb's formulas which relate the orbital position of the earth to ephemeris time; the Julian ephemeris century is subdivided into 36,525 days, and 1 ephemeris day = 86,400 ephemeris seconds.