2017 DT= 69.0 -------------------------------------------------------------- The epoch T=J2017.5 is the date 2017 July 2.375(JD 2457936.875) it corresponds to the Besselian epoch B2017.50165 d h m Beginning of the spring March 20, 10 28.6 UT >> summer June 21, 4 24.2 UT >> autumn September 22, 20 01.8 UT >> winter December 21, 16 27.9 UT d h The Earth at perihelion January 4, 14.3 UT The Earth at aphelion July 3, 20.2 UT