2015 DT= 68.0 -------------------------------------------------------------- The epoch T=J2015.5 is the date 2015 July 2.875(JD 2457206.375) it corresponds to the Besselian epoch B2015.50161 d h m Beginning of the spring March 20, 22 45.1 UT >> summer June 21, 16 37.9 UT >> autumn September 23, 8 20.5 UT >> winter December 22, 4 47.9 UT d h The Earth at perihelion January 4, 6.6 UT The Earth at aphelion July 6, 19.7 UT