2013                 DT= 67.0
--------------------------------------------------------------
  The epoch T=J2013.5 is the date 2013  July   2.375(JD 2456475.875)
  it corresponds to the Besselian epoch B2013.50157
 
                                     d   h  m
 Beginning of the spring March     20, 11 01.9 UT
    >>            summer June      21,  5 04.0 UT
    >>            autumn September 22, 20 44.1 UT
    >>            winter December  21, 17 11.0 UT

                                     d   h
 The Earth at perihelion January    2,  4.6 UT
 The Earth at aphelion   July       5, 14.7 UT