[Yosemitest]

Check out this data from Kasuo Kinoshita, http://jcometobs.web.fc2.com/ [Orbital elements of the comet 209P LINEAR].
The numbers are beyond my comprehension, but you might can use them.

[dr_lew]

The numbers are beyond my comprehension, but you might can use them.

As you say, these are orbital elements, i.e. each row gives the parameters for an ideal elliptical orbit which describes the current motion of the object.

The format is explained at his My elements format link. Not many have use for these, and I am not in that number, although I have gone there.