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Comet Orbits

46P/Wirtanen
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Epoch = 19961232.0 TT = JDT 2450449.5 Ref. = Kretlow 1998
T = 19970314.15003 +/- 0.0003663 Next = 20020827.99668
q = 1.063781340 +/- 0.000001825
a = 3.099204989 +/- 0.000023271
n = 0.180646113 +/- 0.000002028
e = 0.656756703 +/- 0.000002474 P (2000) Q
Peri = 356.34038984 +/- 0.0002348 +0.19725859 -0.95946289
Node = 82.20581815 +/- 0.0001206 +0.90453476 +0.09894887
Incl = 11.72255750 +/- 0.0000149 +0.37802898 +0.26389406
P = 5.45601372 +/- 0.00006149

A1 = -0.47294 +/- 0.107534 [1E-8 AU/day**2]
A2 = 0.20848 +/- 0.101277

From 202 observations, 960320-970528, mean residual 0.48"


C/2004 Q2 (Machholz)
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Epoch 20050818.0 TT = JDT 2453600.5 Ref. = Kretlow 2005
T 20050124.91359 +/- 0.0000203
q 1.205020523 +/- 0.000000251
e 0.999539916 +/- 0.000000991 P (2000) Q
Peri 19.51366444 +/- 0.0000207 -0.31993783 -0.71421442
Node 93.61150723 +/- 0.0000174 +0.76509790 -0.58230412
Incl 38.59151629 +/- 0.0000069 +0.55880676 +0.38835509

A1 +1.13914 +/- 0.007804 [1E-8 AU/day**2]
A2 -0.16726 +/- 0.010678
A3 -0.26485 +/- 0.007645

From 2715 observations, 040827-050714, mean residual 0.48"


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