Orbital elements are taken from MPC 70362:
103P/Hartley
Epoch 2010 Oct. 11.0 TT = JDT 2455480.5
T 2010 Oct. 28.2670 TT MPC
q 1.058693 (2000.0) P Q
n 0.1523112 Peri. 181.2025 +0.7555165 -0.6375872
a 3.472547 Node 219.7600 +0.6030180 +0.7666396
e 0.695125 Incl. 13.6184 +0.2560548 +0.0758048
P 6.47
From 631 observations 1986-2010. +0.00 +0.0000