
     Delta T = ET - UT  since 1620
 according to Astronomical Almanac (2002)
                              pages K8/K9

            (*) values -2050 by F.Espenak
                 NASA RPC 1216 (Mar 1989)

 cc     16 |   17 |   18  |   19  |   20       < FIRST TWO DIGITS OF YEAR
 yy |------|------|-------|-------|-------| yy
 00 |      |+  9  |+ 13.7 |-  2.72|+ 63.83| 00 < LAST TWO DIGITS OF YEAR
 01 |      |   9  |  13.4 |-  1.54|  64.09| 01
 02 |      |   9  |  13.1 |-  0.02|  64.30| 02
 03 |      |   9  |  12.9 |+  1.24|  64   | 03
 04 |      |   9  |  12.7 |   2.64|  65   | 04
 05 |      |   9  |  12.6 |   3.86|  66   | 05
 06 |      |   9  |  12.5 |   5.37|  67   | 06
 07 |      |   9  |  12.5 |   6.14|  68   | 07
 08 |      |  10  |  12.5 |   7.75|  71.3*| 08
 09 |      |  10  |  12.5 |   9.13|  72.2*| 09
    |      |      |       |       |       |
 10 |      |+ 10  |+ 12.5 |+ 10.46|+ 73.3*| 10
 11 |      |  10  |  12.5 |  11.53|  74.1*| 11
 12 |      |  10  |  12.5 |  13.36|  75.0*| 12
 13 |      |  10  |  12.5 |  14.65|  75.8*| 13
 14 |      |  10  |  12.5 |  16.01|  76.6*| 14
 15 |      |  10  |  12.5 |  17.20|  77.5*| 15
 16 |      |  10  |  12.5 |  18.24|  78.3*| 16
 17 |      |  11  |  12.4 |  19.06|  79.1*| 17
 18 |      |  11  |  12.3 |  20.25|  80.0*| 18
 19 |      |  11  |  12.2 |  20.95|  80.9*| 19
    |      |      |       |       |       |
 20 |+124  |+ 11  |+ 12.0 |+ 21.16|+ 81.8*| 20
 21 | 119  |  11  |  11.7 |  22.25|  83.0*| 21
 22 | 115  |  11  |  11.4 |  22.41|  83.9*| 22
 23 | 110  |  11  |  11.1 |  23.03|  84.9*| 23
 24 | 106  |  11  |  10.6 |  23.49|  85.7*| 24
 25 | 102  |  11  |  10.2 |  23.62|  86.6*| 25
 26 |  98  |  11  |   9.6 |  23.86|  87.6*| 26
 27 |  95  |  11  |   9.1 |  24.49|  88.5*| 27
 28 |  91  |  11  |   8.6 |  24.34|  89.4*| 28
 29 |  88  |  11  |   8.0 |  24.08|  90.8*| 29
    |      |      |       |       |       |
 30 |+ 85  |+ 11  |+  7.5 |+ 24.02|+ 91.8*| 30
 31 |  82  |  11  |   7.0 |  24.00|  92.7*| 31
 32 |  79  |  11  |   6.6 |  23.87|  93.7*| 32
 33 |  77  |  11  |   6.3 |  23.95|  94.7*| 33
 34 |  74  |  12  |   6.0 |  23.86|  95.7*| 34
 35 |  72  |  12  |   5.8 |  23.93|  96.6*| 35
 36 |  70  |  12  |   5.7 |  23.73|  97.7*| 36
 37 |  67  |  12  |   5.6 |  23.92|  98.7*| 37
 38 |  65  |  12  |   5.6 |  23.96|  99.7*| 38
 39 |  63  |  12  |   5.6 |  24.02| 101.2*| 39
    |      |      |       |       |       |
 40 |+ 62  |+ l2  |+  5.7 |+ 24.33|+102.3*| 40
 41 |  60  |  12  |   5.8 |  24.83| 103.4*| 41
 42 |  58  |  12  |   5.9 |  25.30| 104.4*| 42
 43 |  57  |  12  |   6.1 |  25.70| 105.5*| 43
 44 |  55  |  13  |   6.2 |  26.24| 106.6*| 44
 45 |  54  |  13  |   6.3 |  26.77| 107.7*| 45
 46 |  53  |  13  |   6.5 |  27.28| 108.7*| 46
 47 |  51  |  13  |   6.6 |  27.78| 109.9*| 47
 48 |  50  |  13  |   6.8 |  28.25| 111.0*| 48
 49 |  49  |  13  |   6.9 |  28.71| 112.6*| 49
    |      |      |       |       |       |
 50 |+ 48  |+ 13  |+  7.1 |+ 29.15|+113.8*| 50
 51 |  47  |  14  |   7.2 |  29.57|       | 51
 52 |  46  |  14  |   7.3 |  29.97|       | 52
 53 |  45  |  14  |   7.4 |  30.36|       | 53
 54 |  44  |  14  |   7.5 |  30.72|       | 54
 55 |  43  |  l4  |   7.6 |  31.07|       | 55
 56 |  42  |  14  |   7.7 |  31.35|       | 56
 57 |  41  |  14  |   7.7 |  31.68|       | 57
 58 |  40  |  15  |   7.8 |  32.18|       | 58
 59 |+ 38  |  15  |   7.8 |  32.68|       | 59
    |      |      |       |       |       |
 60 |+ 37  |+ 15  |+  7.88|+ 33.15|       | 60
 61 |  36  |  15  |   7.82|  33.59|       | 61
 62 |  35  |  15  |   7.54|  34.00|       | 62
 63 |  34  |  15  |   6.97|  34.47|       | 63
 64 |  33  |  15  |   6.40|  35.03|       | 64
 65 |  32  |  16  |   6.02|  35.73|       | 65
 66 |  31  |  16  |   5.41|  36.54|       | 66
 67 |  30  |  16  |   4.10|  37.43|       | 67
 68 |  28  |  16  |   2.92|  38.29|       | 68
 69 |  27  |  16  |   1.82|  39.20|       | 69
    |      |      |       |       |       |
 70 |+ 26  |+ 16  |+  1.61|+ 40.18|       | 70
 71 |  25  |  16  |+  0.10|  41.17|       | 71
 72 |  24  |  16  |-  1.02|  42.23|       | 72
 73 |  23  |  16  |-  1.28|  43.37|       | 73
 74 |  22  |  16  |-  2.69|  44.49|       | 74
 75 |  21  |  l7  |-  3.24|  45.48|       | 75
 76 |  20  |  17  |-  3.64|  46.46|       | 76
 77 |  19  |  17  |-  4.54|  47.52|       | 77
 78 |  18  |  17  |-  4.71|  48.53|       | 78
 79 |  17  |+ 17  |-  5.11|  49.59|       | 79
    |      |      |       |       |       |
 80 |+ 16  |+ 17  |-  5.40|+ 50.54|       | 80
 81 |  15  |  17  |-  5.42|  51.38|       | 81
 82 |  14  |  17  |-  5.20|  52.17|       | 82
 83 |  14  |  17  |-  5.46|  52.96|       | 83
 84 |  13  |  17  |-  5.46|  53.79|       | 84
 85 |  12  |  17  |-  5.79|  54.34|       | 85
 86 |  12  |  17  |-  5.63|  54.87|       | 86
 87 |  11  |  17  |-  5.64|  55.32|       | 87
 88 |  11  |  17  |-  5.80|  55.82|       | 88
 89 |  10  |  17  |-  5.66|  56.30|       | 89
    |      |      |       |       |       |
 90 |+ 10  |+ 17  |-  5.87|+ 56.86|       | 90
 91 |  10  |  17  |-  6.01|  57.57|       | 91
 92 |   9  |  16  |-  6.19|  58.31|       | 92
 93 |   9  |  16  |-  6.64|  59.12|       | 93
 94 |   9  |  16  |-  6.44|  59.98|       | 94
 95 |   9  |  16  |-  6.47|  60.78|       | 95
 96 |   9  |  15  |-  6.09|  61.63|       | 96
 97 |   9  |  IS  |-  5.76|  62.29|       | 97
 98 |   9  |  14  |-  4.66|  62.97|       | 98
 99 |+  9  |+ 14  |-  3.74|+ 63.47|       | 99

  ================================================
 
  FROM MAXCLOCK.ZIP:
  * For dates before 948, Chapront's equation 26 is used (with a
     very minor correction to enable a smooth transition to the next
     time interval). The equation is:
  FOR -391 < YR < +948
     DT = 2176.8005 + 497*t + 44.1*t^2
          2177      + 495*t + 42.4*t^2     original equation
   * For 948 to 1600, Chapront's equation 25 is used.
      t = (YR-2000)/100
     It is:   DT = 102 + 102*t + 25.3*t^2
                   102 + 100*t + 23.6*t^2  original equation
  
  ==================================
 
 JPL HORIZONS: www.rumblefische.com/calendars
     FOR -2999 < YR < +948         [ USE YR < +948 ]
   T = (YR-1820)/100
   DT = 31*T^2
 
     FOR +948 < YR < +1620         [ USE BETWEEN +948 < YR < 1620 ]
   U=(YR-2000)/100
   DT = 50.6 + 67.5 * U + 22.5 * U^2 
 
 PROJECT PLUTO:  www.rumblefische.com/calendars
   U=(YR-2000)/100
     FOR 947 < YR < 1620 
   DT = 50.6 + 67.5 * U + 22.5 * U^2 
     FOR YR < 948
   DT = 2715.6 + 573.36 * U + 46.5 * U^2 
     FOR YR > 2014
   DT = 62.6 + 70 * U + 32.5 * U^2 
 
 ESPENAK:   www.rumblefische.com/calendars
     FOR 1950 <= YR <= 2100        [ USE BETWEEN 2010 <= YR <= 2100 ]
   DT = 65.0 + 76.15 * U + 41.6 * U^2 

